Well, thread to show what u cracked out of anything u modded, anything to do with audio-video equipment.
(I cant find relevant thread...)
Will update soon...
DIY HACK MOD, Everything paranormal and ™ infringement
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 Jun 21 2007, 08:11 PM, updated 18y ago
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#1
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Senior Member
3,448 posts Joined: Jan 2003 From: Sarawak  
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Jun 21 2007, 08:17 PM
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#2
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Senior Member
2,205 posts Joined: Jan 2003
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ijan,
you so active le, on holidays aa? how about the arrivals of the parts? still waiting for it? |
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Jun 21 2007, 08:37 PM
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#3
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Senior Member
3,448 posts Joined: Jan 2003 From: Sarawak
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Baru finish, the 'LEGENDARY' HEED CanAmp, so called made and engineered in Hungary..they really need to behungry for more knowledge before engineering anything.
What haf been done..changed the decoupling caps to 3.3uF polyester from a lowly 0.47uF polyester, effectively moving the cutoff point by a full decade. Added dual positive/negative rail regulation to the so called stock 'snubber' regulation, pretty puny stock regulation. Added 2xNichicon KZ caps for rail capacitance after regulation. Removed unnecassary LPF at the feedback. a lot of pcb track hacking and rewiring done. Improvement, well, super silent, no more background noise and statics when the volme knob is at max. Better sound, not as bloated, more balanced, wider soundstage and much much more..so much better than stock. Added on June 21, 2007, 8:38 pmNot active bro kapitan, im werking overdrive..its like 8-5 day werk and go back home, 6-11 night werk (all the mods and manufacturing) all day long!  its tiring..Your part belum sampai, ill inform u upon arrival  Its not only ur EMU, including you, theres another person who is also waiting for his EMU mod.This post has been edited by ijan: Jun 21 2007, 08:38 PM |
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Jun 21 2007, 08:39 PM
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#4
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Senior Member
6,934 posts Joined: Jan 2003 From: Audiophilia valley... 
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He's not focusing on his job la...
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Jun 21 2007, 08:44 PM
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#5
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2,205 posts Joined: Jan 2003
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QUOTE(walabies @ Jun 21 2007, 08:39 PM) He's not focusing on his job la... Part-time or full-time? His partime job is from 8-5 and fulltime from 6-11 le...  |
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Jun 21 2007, 08:44 PM
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#6
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Senior Member
3,448 posts Joined: Jan 2003 From: Sarawak
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Since these are in my records, previously done hack mod on a Zhaolu D2.5A. Mods encompasses DAC Pre-Amp minor upgrade and more towards the stock headamp unit upgrade.
Change the 4xelectrolytic+4xsmall polyester to 4xhuge polyester caps which i love. these caps are cheap and sounds fantastic! Also bypassed sum unnecassary filter and decouplings in the pre amp since stock zhaolu has a lot in redundancy. Also upgrade the power reseveoir caps for the pre amp board. For the headamp, removed extra decoupling and ground decouplings for feedback loops. The DAC pre amp decoupling is enough for everything, a lot of parts were removed here. Bypassed the first 2 opamps since they are redundant and modded 2xOPA637BP to fit into one dual 8-DIP with a dockable module with extrasss on top. I think that is what i can recall.. Aftermath, ask the owner la.. This post has been edited by ijan: Jun 21 2007, 08:45 PM |
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Jun 21 2007, 08:47 PM
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#7
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Staff
9,417 posts Joined: Jan 2003 From: Bladin Point, Northern Territory
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Lawl i see familiar capacitors
Just asking about the HEED, what filter does it use, and can you generally sketch out the circuit fer me....pretty please?  And that opamp, what it is? DC servo? Extra amplification? Unity Gain buffer?! I must know! This post has been edited by empire23: Jun 21 2007, 08:49 PM |
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Jun 21 2007, 08:50 PM
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#8
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Senior Member
3,448 posts Joined: Jan 2003 From: Sarawak
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Next! A simple AV710 mods. This mod was done since the card was with me. hell, HaCK it lorr! Simple la, just removed sum decoupling and changed sum caps with better ones, those are directly related to the 2 channel analogue output thru the wolfson codec. bypassed lots of stuff though..
Aftermath, they sound generally better, better than stock, thats all i haf to say.. This post has been edited by ijan: Jun 21 2007, 09:12 PM |
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Jun 21 2007, 08:52 PM
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#9
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Senior Member
975 posts Joined: Sep 2004 From: Setapak 
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opamp? maybe for voltage gain..the transistor is for buffer (single end..)
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Jun 21 2007, 08:53 PM
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Senior Member
3,448 posts Joined: Jan 2003 From: Sarawak
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HEED schemas, u need to ask the owner, its like a private collection, i make them, he gets royalties, haha! Btw, the opamp, no fancy2 stuff, its just the opamp la, opamp-class a output.
Filter, RC nyiaaaaaa at the feedback ground, LPF filter. Going on...M-Audio Audiophile 2496. This was a head ache since i haf to create a new PSU ofr it. its the longest mod i haf everrrrrrrrrr made and if I was single, iw ould be so throughout the build.. Nothing much, socketed opamps, decoupling changes to my fav 3.3uF polyester. Removed a lot of filters that i deemed unnecassary. Isolated digital and analogue ground. Many more that i just cant remember...However the owner is not very satisfied with it saying that he is having noise issues which i never encountered during my testing period. the DAC will come back to me after almost 6 months in Australie. We will see how..Not to mention the PSU i built rosak due to postage and he had to pay a noob australian 40% of what he paid me...just to solder a transformer back...wtf!  Pictures are not the final pics, much more has been done, will update when i get it back. The second pic has the PSU with it..its MASSIVE! This post has been edited by ijan: Jun 21 2007, 09:14 PM |
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Jun 21 2007, 09:01 PM
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Staff
9,417 posts Joined: Jan 2003 From: Bladin Point, Northern Territory
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QUOTE(ijan @ Jun 21 2007, 08:37 PM) Added dual positive/negative rail regulation to the so called stock 'snubber' regulation, pretty puny stock regulation. Added 2xNichicon KZ caps for rail capacitance after regulation. LOL at the Snubber joke.Anyways, what snubber did they use? RC or Bridge Diodes? |
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Jun 21 2007, 09:04 PM
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Senior Member
3,448 posts Joined: Jan 2003 From: Sarawak
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i dinno it was a snubber till lilghost told me..i was like, wtf made this, where the hell did heed get this kind of regulation..it was like an R..only a piece of R..wtf!
but i do get the notion, having a continuos load for the opamp power only will maintain a better regulation there..but still, WTF! Added on June 21, 2007, 9:05 pmWill update more...banyak lagi things i haf done, but just undocumented and no pictures...hmmm... This post has been edited by ijan: Jun 21 2007, 09:05 PM |
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Jun 21 2007, 09:06 PM
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Senior Member
3,448 posts Joined: Jan 2003 From: Sarawak
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Others who haf modded/hacked sumthing, come on and post up, i din make this thread for me now eh?
 This post has been edited by ijan: Jun 21 2007, 09:09 PM |
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Jun 21 2007, 09:08 PM
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Staff
9,417 posts Joined: Jan 2003 From: Bladin Point, Northern Territory
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QUOTE(ijan @ Jun 21 2007, 09:04 PM) i dinno it was a snubber till lilghost told me..i was like, wtf made this, where the hell did heed get this kind of regulation..it was like an R..only a piece of R..wtf! Technically if you put stable load that doesn't suffer from transient demands and such. But then again, since when was audio transient anyways? A bass hit will always demand more current.but i do get the notion, having a continuos load for the opamp power only will maintain a better regulation there..but still, WTF! Added on June 21, 2007, 9:05 pmWill update more...banyak lagi things i haf done, but just undocumented and no pictures...hmmm... Well, what were they thinking.....i dunno lol, save money from buying LT317T kot?  |
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Jun 21 2007, 09:11 PM
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Senior Member
3,448 posts Joined: Jan 2003 From: Sarawak
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huh, 18V tranny is not even 10% loaded at idle, output was 25.6V at idle, thats like less than 10% load, so its like, super no regulation at all. hoping on massive capacitance to filter the ripple is stoopid.
Neways, since space is constraining, the Heed employs 7809 and 7909 with P2P wiring with heastinks slapped on to the side of the transformer. All IC regs are ST and Pana series. |
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Jun 21 2007, 09:38 PM
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Staff
9,417 posts Joined: Jan 2003 From: Bladin Point, Northern Territory
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Here's some of mine
Only one lah, sorry. Here's a before tant mod, but after the film caps mod, managed to keep it down from 60mV to now 30mV, that's 0.06 percent regulation accuracy. Niceeee. Hoping to add tantalum and higher value rail to rail dc caps! 
Now with 4.7 times more capacitance for the main bypass  
Attach Bleeder resistor, receeve lower transients. 
This post has been edited by empire23: Jun 21 2007, 09:42 PM Attached thumbnail(s) 
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Jun 21 2007, 10:08 PM
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Senior Member
3,448 posts Joined: Jan 2003 From: Sarawak
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A recently finished project, 24V Linear PSU with XLR connectors. Dual regulator design, nothing special with choke inputs. Able to withstand continuos power of 12W for a day, tested with sum power resistors.
However, the owner used them for less than an hour sudah rosak..sumthing went massively wrong, i blame it on my build not on the postage so the PSU is on the way back to me for repairs....sigh Pictures are not final, final pics include heatshrinking and more glue and star earth for the shield+case. This post has been edited by ijan: Jun 21 2007, 10:11 PM |
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Jun 21 2007, 10:23 PM
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Staff
9,417 posts Joined: Jan 2003 From: Bladin Point, Northern Territory
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^ based on what regulator topology?
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Jun 21 2007, 10:49 PM
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Senior Member
3,448 posts Joined: Jan 2003 From: Sarawak
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whaddaya expect, datasheet topology laaa
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Jun 21 2007, 11:02 PM
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Senior Member
947 posts Joined: Aug 2005
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im gonna hijack your thread and show off my infinitely variable 5-25v linear reg. PSU! haha! no i didnt diy it but i had my buddy gary make this for me. i use it to charge and power stuff.
a closeup of the lcd display showing exactly voltage supplied  front panel of PSU housing the variable voltage knob, on-off switch and - + power jack  pic of whole unit incld power plugs  can i consider this a case of my infinitely variable PSU is better than your standard 24v PSU?? just kidding dude. couldnt help myself here.  i respectfully hand your thread back to you  This post has been edited by scottiebabie: Jun 21 2007, 11:08 PM |
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Jun 21 2007, 11:38 PM
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Senior Member
3,448 posts Joined: Jan 2003 From: Sarawak
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auw come on, this thread is not mine, nanti i LOCK baru tau
I just wanna see what ppl haf done, but ppl wont do that unless u do that too, u get what i mean?The 24V psu is a high regulation high load/stress psu thats all. However, i respect ur PSU for the digital output..hehe! How did he do that? it slike stripping a RM20 DMM for the voltage U know how i can contact ur fren Gary, it would be interesting |
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Jun 22 2007, 12:01 PM
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Senior Member
2,864 posts Joined: Jan 2005
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QUOTE Nothing much, socketed opamps, decoupling changes to my fav 3.3uF polyester. Removed a lot of filters that i deemed unnecassary. Isolated digital and analogue ground. Many more that i just cant remember...However the owner is not very satisfied with it saying that he is having noise issues which i never encountered during my testing period. the DAC will come back to me after almost 6 months in Australie. We will see how..Not to mention the PSU i built rosak due to postage and he had to pay a noob australian 40% of what he paid me...just to solder a transformer back...wtf! rclxub.gif Hee hee Sorry for adding to your workload, and about the noise issues... I'm having some real doubts about whether its because of the DAC or whether its my stupid transport/laptop -__- anyway try testing it a bit more first gua.Glue isn't strong enough to hold down a tranny during postage btw >_> |
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Jun 23 2007, 02:42 PM
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Senior Member
6,934 posts Joined: Jan 2003 From: Audiophilia valley...
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QUOTE(ijan @ Jun 21 2007, 08:44 PM) Since these are in my records, previously done hack mod on a Zhaolu D2.5A. Mods encompasses DAC Pre-Amp minor upgrade and more towards the stock headamp unit upgrade. Owner? Is this mine one u mentioning?Change the 4xelectrolytic+4xsmall polyester to 4xhuge polyester caps which i love. these caps are cheap and sounds fantastic! Also bypassed sum unnecassary filter and decouplings in the pre amp since stock zhaolu has a lot in redundancy. Also upgrade the power reseveoir caps for the pre amp board. For the headamp, removed extra decoupling and ground decouplings for feedback loops. The DAC pre amp decoupling is enough for everything, a lot of parts were removed here. Bypassed the first 2 opamps since they are redundant and modded 2xOPA637BP to fit into one dual 8-DIP with a dockable module with extrasss on top. I think that is what i can recall.. Aftermath, ask the owner la.. Looks similar... |
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Jun 24 2007, 11:50 AM
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Junior Member
236 posts Joined: Jan 2003
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hi all after change my x-fi op amp to lm4562 now i am thinking to recap the card with muse or black gate any way i can get it ?ts help pls....
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Jun 24 2007, 11:56 AM
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Staff
9,417 posts Joined: Jan 2003 From: Bladin Point, Northern Territory
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QUOTE(skydna @ Jun 24 2007, 11:50 AM) hi all after change my x-fi op amp to lm4562 now i am thinking to recap the card with muse or black gate any way i can get it ?ts help pls.... Buy from me. Or since i'm going to octave right now, just PM me your request. |
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Jun 26 2007, 12:40 PM
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Junior Member
108 posts Joined: Mar 2007
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Joining...
My current mods (unfinished): Onkyo SE-90PCI (all capacitors except the OS-CON removed)...  I will use the BlackGate F Series & NX Hi-Q, Vishay S102 & Holco resistor, and SideRealKap (all on the way, expect to arrive today). Available parts are Elna Cerafine, Rubycon ZL, and ZA.    My previous project: Altec MX5021: Supply capacitors replaced with oversized one.  The coupling capacitors replaced. The opamp modified with socket and OPA2134PA.  The new XO with Solen for the high pass and cheapo polyprop capacitor for the low pass. Rewired with Canare cables (not shown).  This post has been edited by xneakers: Jun 26 2007, 01:01 PM |
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Jun 26 2007, 01:06 PM
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Junior Member
108 posts Joined: Mar 2007
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Toshiba SD-2960 DVD Player:
D/A coupling and supply capacitor replaced.  Switching PSU capacitor replaced.  Just another shoot  I will try to change the main caps with 4x22uF/630V Solen to see the different... I don't believe in switching PSU, but this time, I will give it a try...  also the Vishay SF5407 diode will replace the standard IN4007... This post has been edited by xneakers: Jun 26 2007, 01:09 PM |
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Jun 26 2007, 03:56 PM
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Senior Member
6,489 posts Joined: Mar 2005 From: Serdang
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xneakers : SALUTE
your caps replacement is...=P super power... |
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Jun 26 2007, 06:31 PM
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Senior Member
3,448 posts Joined: Jan 2003 From: Sarawak
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xneaker, tis is what im talking about, hehe! But i also dun haf hope in SMPS, eventhough the rated switching frequency well over audio range, they are still sum tiny itsy bitsy spike that is kinda audible even thru a good isolated audio circuit..or was that a placebo...
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Jun 26 2007, 11:21 PM
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Junior Member
236 posts Joined: Jan 2003
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xneakers after finish mod ur onkyo remember to write a review before and after to share with us........
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Jun 27 2007, 09:12 PM
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All Stars
12,214 posts Joined: Jan 2003 From: Singapore | Malaysia
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received my modded Heed from Ijan today. Very professional work and it sounded so much better compared to last time. Played with opamps for almost 4 hours now the Heed is powered by dual 637s on a brown-doggie |
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Jun 27 2007, 09:46 PM
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Senior Member
6,934 posts Joined: Jan 2003 From: Audiophilia valley...
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Pictars? Dude you have any ops for us? Ordering online is damn exp...
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Jun 27 2007, 11:22 PM
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All Stars
12,214 posts Joined: Jan 2003 From: Singapore | Malaysia
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I have quite a handful of opamps with me now. Let me generate a brief impression on each of them.
Equipments: as stated in my siggie Songs tested: 1. Corrinne May - Angel in Disguise (Safe in a Crazy World) 2. Johann Strauss II/ Josef Strauss: Pizzicato Polka (Denon Hi-Fi Strings XRCD) 3. Pachebel: Canon (Denon Hi-Fi Strings XRCD) 4. Mozart: Sinfonia Concertante for Violin, Viola & Orchestra in E-flat Major, KV364 (320d) (Denon Hi-Fi Strings XRCD) 5. Il Divo - I Believe in You (Ancora) 6. Arne Domnerus - Limehouse Blues (Jazz at the Pawnshop Disc 1) 7. Diana Krall - Black Crow (The Girl in the other Room) 8. Jane Zhang - 我用所有报答爱(The Banquet) NE5532 - Heed Audio CanAmp's stock opamp - Bass is thin/moderate. Not as impactful as other opamps I'd tested. - Huge loss of details, imaging is below average. Good for classical perhaps, coz it kindda eliminates details such as flipping the scores, tapping feet etc - Vocals are very much cold and sterile. Corrinne May sang as if she just got dumped by her boyfriend. - On I Believe in You, you know you're listening from a pair of headphones. National Semiconductor LM4562NA - Airy - Laid-back sound signature, but vocals are a little forward. - Details are everywhere. Imaging is excellent too. - A bit on the dry side, especially on classical. - Bass is moderate and refined, outperforms the NE5532. - Not musical. It sounds good, but it is not a keeper imho. National Semiconductor LME49720NA - Sounded quite the same as the LM4562NA. It is airy, very detailed and good imaging. - Bass is stronger and more refined than the LM4562NA. - Not as sterile as the LM4562NA, a little warm which makes it much more listenable than the LM4562NA. Analog Device AD823AN - Bass is strong, on par with the LME49720NA - Vocals are quite forward. However the AD823 performs exceptionally well on vocals compare to the other opamps. - A musical opamp. Performs well in classical Analog Device AD DY2000 - Similar to the AD823AN, it has stronger bass. - Its performance on vocals is still very much the best among the rest. BB OPA2107 - Forward vocals - Warm sound signature - Narrower soundstage BB OPA637BP on dual-to-single browndog - vocals are not as forward as the 2107 - i guess all OPAs inherits the warm sound signature? - good details, expansive soundstage too - the most musical opamp among the rest - hard to stabilize. Having some minor issues with my Heed Conclusion: Most detailed award: from NS (i prefer the LME49720NA) Best vocals award: AD DY2000 Best overall performance: AD823AN currently sitting in the opamp socket in my Heed: the 637s haha! |
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Jun 27 2007, 11:31 PM
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All Stars
12,214 posts Joined: Jan 2003 From: Singapore | Malaysia
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QUOTE(walabies @ Jun 27 2007, 09:46 PM) Pictars? Dude you have any ops for us? Ordering online is damn exp... Xmas is near... don't wanna be a bad boy else no present this year. Haha, here's my deal:I'll give you 2 free opamps and yuheng 3 free opamps. Opamps i have in hand: 2x LM4562 3x LME49720 ** 2x LM6172 ** 1x AD823AN 1x AD DY2000 1x OPA2107 1x NE5532 (Heed's stock opamp) 2x OPA2604 (ZL's stock opamps) ** I might swap the LM6172s from my ZL and replace them with a pair of LME49720. If i swapped them, that means i'll have 2x LM6172 and 1x LME49720 available. p.s.: walabies, i guess you only can use the LMs since our D2.5 needs a pair of same opamps. As for yuheng, you also need a pair + another opamp at the front. that makes 2 for walabies, 3 for yuheng. another p.s.: this offer is only applicable to walabies and yuheng |
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Jun 28 2007, 12:10 AM
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Senior Member
6,934 posts Joined: Jan 2003 From: Audiophilia valley...
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Gud gud, I wanted the 4562. Where you bought them? Yuheng also want 4562, lack of stocks...
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Jun 28 2007, 01:39 AM
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All Stars
12,214 posts Joined: Jan 2003 From: Singapore | Malaysia
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bought them? nah, they come in a free envelope
you and yuheng still in JB? I guess it is easier if i just send all my opamps to you by this week? |
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Jun 29 2007, 03:11 PM
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Senior Member
6,934 posts Joined: Jan 2003 From: Audiophilia valley...
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Ah sh1t you dont have much stock. You wanna free us some opaS?
Yaya, post to us  Which one really hits the staging? I wanted a pair of LME49720 (detail freak) but seems like you are using it. If you used them up, let me have the LM4562NA |
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Jun 30 2007, 12:00 AM
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All Stars
12,214 posts Joined: Jan 2003 From: Singapore | Malaysia
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Ok, here's my final list of opamps:
2x LM4562 3x LME49720 1x AD823AN 1x AD DY2000 1x OPA2107 1x NE5532 (Heed's stock opamp) 2x OPA2604 (ZL's stock opamps) 2x OPA2132 (this will not be free, ijan lend me to play with so you'll have to pay him haha From what i was told, the 2132 performs better than the 2107)maybe i can post all of them to you, then after you'd picked your favourite opamps you can pass the remaining stash to yuheng |
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Jun 30 2007, 04:22 PM
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Senior Member
1,472 posts Joined: Apr 2005 From: SumwHeRe In MaLaYsIa
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ad dy2000 and lme 4562 also lme49720...hehehe..wanna try..well...i only live with burrbrown opa....
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Jun 30 2007, 10:48 PM
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Senior Member
6,934 posts Joined: Jan 2003 From: Audiophilia valley...
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QUOTE(yrh0413 @ Jun 30 2007, 12:00 AM) Ok, here's my final list of opamps: You can post to me anytime, but can I return it to you are 16 July? I will be at KL that time.2x LM4562 3x LME49720 1x AD823AN 1x AD DY2000 1x OPA2107 1x NE5532 (Heed's stock opamp) 2x OPA2604 (ZL's stock opamps) 2x OPA2132 (this will not be free, ijan lend me to play with so you'll have to pay him haha From what i was told, the 2132 performs better than the 2107)maybe i can post all of them to you, then after you'd picked your favourite opamps you can pass the remaining stash to yuheng |
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Jun 30 2007, 10:59 PM
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All Stars
12,214 posts Joined: Jan 2003 From: Singapore | Malaysia
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you can post it to yuheng after you'd pick your opamps. I'll get the remaining ones from him during our 2nd meet alright? pm me your postal address |
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Jul 8 2007, 08:37 PM
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Senior Member
6,934 posts Joined: Jan 2003 From: Audiophilia valley...
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QUOTE(yrh0413 @ Jun 27 2007, 11:22 PM) I have quite a handful of opamps with me now. Let me generate a brief impression on each of them. yrh posted me some opamps. Tried some of his recommends, swapping between DACs and DAC pre-amps and critical listening took me almost two days. Equipments: as stated in my siggie Songs tested: 1. Corrinne May - Angel in Disguise (Safe in a Crazy World) 2. Johann Strauss II/ Josef Strauss: Pizzicato Polka (Denon Hi-Fi Strings XRCD) 3. Pachebel: Canon (Denon Hi-Fi Strings XRCD) 4. Mozart: Sinfonia Concertante for Violin, Viola & Orchestra in E-flat Major, KV364 (320d) (Denon Hi-Fi Strings XRCD) 5. Il Divo - I Believe in You (Ancora) 6. Arne Domnerus - Limehouse Blues (Jazz at the Pawnshop Disc 1) 7. Diana Krall - Black Crow (The Girl in the other Room) 8. Jane Zhang - 我用所有报答爱(The Banquet) NE5532 - Heed Audio CanAmp's stock opamp - Bass is thin/moderate. Not as impactful as other opamps I'd tested. - Huge loss of details, imaging is below average. Good for classical perhaps, coz it kindda eliminates details such as flipping the scores, tapping feet etc - Vocals are very much cold and sterile. Corrinne May sang as if she just got dumped by her boyfriend. - On I Believe in You, you know you're listening from a pair of headphones. National Semiconductor LM4562NA - Airy - Laid-back sound signature, but vocals are a little forward. - Details are everywhere. Imaging is excellent too. - A bit on the dry side, especially on classical. - Bass is moderate and refined, outperforms the NE5532. - Not musical. It sounds good, but it is not a keeper imho. National Semiconductor LME49720NA - Sounded quite the same as the LM4562NA. It is airy, very detailed and good imaging. - Bass is stronger and more refined than the LM4562NA. - Not as sterile as the LM4562NA, a little warm which makes it much more listenable than the LM4562NA. Analog Device AD823AN - Bass is strong, on par with the LME49720NA - Vocals are quite forward. However the AD823 performs exceptionally well on vocals compare to the other opamps. - A musical opamp. Performs well in classical Analog Device AD DY2000 - Similar to the AD823AN, it has stronger bass. - Its performance on vocals is still very much the best among the rest. BB OPA2107 - Forward vocals - Warm sound signature - Narrower soundstage BB OPA637BP on dual-to-single browndog - vocals are not as forward as the 2107 - i guess all OPAs inherits the warm sound signature? - good details, expansive soundstage too - the most musical opamp among the rest - hard to stabilize. Having some minor issues with my Heed Conclusion: Most detailed award: from NS (i prefer the LME49720NA) Best vocals award: AD DY2000 Best overall performance: AD823AN currently sitting in the opamp socket in my Heed: the 637s haha! And I have to match two equipments I have here, the MS2i and AegoM, took me lots of time. Below are my personal opinion and preference, just make them as a pleasure reading Stock opamps are using OPA2604AP in its DAC, which sucks up too much details, what I mean a lot is really A LOT!!! So anyone who is using Zhaolu please swap it's opamps at least, a small price to pay for big improvement.NE5532 Since yrh says it's bad, I just dump it aside and never touch it. National Semiconductor LME49720NA Laid back signature, very expansive soundstage, warm, and added credits to my AegoM, Details are freaky awesome  and one of the best imaging. The vocals are more forward than the background. Bass is a tiny bit stronger and detailed than the stock. A little colourful signny. National Semiconductor LM4562NA Laid back sound, but in oppose to yrh, I feel that vocals are laid back, that's weird...  Maybe different rig produce different results.Another awesome detail producing opamp Expansive soundstage again... Dry and sterile, natural. Not as colourful as LME49720. Analog Device AD823AN Refine bass, but it does improve a little bit of here and there but actually I cant differentiate much with the stock OPA. Vocal is laid back, er... different results again. I only have one of this, so this is on my DAC-preamp. I dont like this on my MS2i, dont feel the 'intimate' feeling that I have on my stock OPA2604, in fact I would prefer the stock. Analog Device AD DY2000 Strong and refine bass, vocal is sOOO much better than the 2604 and AD823AN, I was hooked on to this and listened for quite a few hours and finally decided this is my taker for my DAC-preamp. Sounds very intimate with a forwarded vocal and good separation presentation. BB OPA2107 Ok, this is BB (bye bye) for me too, narrowed down my soundstage for my AegoM. Took it out for just testing a few tracks. It's warm and more detail than the stock opa. The DACs are direct output to the AegoM, in the end I took the LME49720 as my DAC opamps and DY2000 for my DAC-preamp board. Enjoy |
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Jul 8 2007, 09:56 PM
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All Stars
12,214 posts Joined: Jan 2003 From: Singapore | Malaysia
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haha, now everyone's Zhaolu is a different beast d. |
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Jul 8 2007, 10:07 PM
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Junior Member
236 posts Joined: Jan 2003
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walabis bro pls find also the LME49860 and AD8599
u all sifu impression is really useful for all those wanna playing opamp roiling....... |
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Jul 9 2007, 12:14 AM
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Junior Member
157 posts Joined: Mar 2007 From: P.J
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walabies,wats ur ZL version?
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Jul 9 2007, 04:54 PM
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Senior Member
6,934 posts Joined: Jan 2003 From: Audiophilia valley...
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QUOTE(skydna @ Jul 8 2007, 10:07 PM) walabis bro pls find also the LME49860 and AD8599 The opamp sifu and supplier here are empire23 and yrh0413, I cant help you much u all sifu impression is really useful for all those wanna playing opamp roiling....... QUOTE(nicholas0507 @ Jul 9 2007, 12:14 AM) walabies,wats ur ZL version? 2.5A. You just sold it?  Need do some modding to unlock it's potential la...  Now it's revived. |
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Jul 9 2007, 05:09 PM
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Junior Member
398 posts Joined: Dec 2004 From: Am Neckar
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QUOTE(walabies @ Jul 9 2007, 04:54 PM) Need do some modding to unlock it's potential la... Now it's revived. I have Zhaolu 2.5C. Can u give some recommendation? |
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Jul 9 2007, 06:37 PM
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Senior Member
6,934 posts Joined: Jan 2003 From: Audiophilia valley...
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QUOTE(slacx @ Jul 9 2007, 05:09 PM) What modding must I do to unlock it's potential? You signature shows that you have swap it's opamps.I have Zhaolu 2.5C. Can u give some recommendation? Lastly you should send for those expert for mods (e.g. Ijan, empire23 etc) » Click to show Spoiler - click again to hide... « |
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Jul 9 2007, 09:52 PM
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Junior Member
157 posts Joined: Mar 2007 From: P.J
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QUOTE(walabies @ Jul 9 2007, 04:54 PM) 2.5A. You just sold it? Need do some modding to unlock it's potential la... Now it's revived.  My LM49720 just arrive in my hand today afternoon...now busy rolling in with LM4752... |
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Jul 9 2007, 10:02 PM
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Senior Member
6,934 posts Joined: Jan 2003 From: Audiophilia valley...
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Happy rolling
Describe the difference in your setups? |
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Jul 9 2007, 10:34 PM
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All Stars
12,214 posts Joined: Jan 2003 From: Singapore | Malaysia
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nicholas0507 how did you roll opamps? Roll all 3 with the same ones?
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Jul 10 2007, 08:32 PM
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Junior Member
111 posts Joined: Apr 2005
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QUOTE(nicholas0507 @ Jul 9 2007, 09:52 PM) Nola....it serve me vey well hey, mind to tell me where to get the LME49720NA? My LM49720 just arrive in my hand today afternoon...now busy rolling in with LM4752...  |
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Jul 10 2007, 09:19 PM
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All Stars
12,214 posts Joined: Jan 2003 From: Singapore | Malaysia
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 NS' samples program of course. |
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Jul 10 2007, 09:36 PM
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Staff
9,417 posts Joined: Jan 2003 From: Bladin Point, Northern Territory
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Here's my completed PPAv2, recently returned from Eokboy.
Currently lacking PSU.  |
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Jul 10 2007, 09:55 PM
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Senior Member
6,934 posts Joined: Jan 2003 From: Audiophilia valley...
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Are you really selling it 1k?
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Jul 10 2007, 10:06 PM
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Junior Member
157 posts Joined: Mar 2007 From: P.J
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QUOTE(yrh0413 @ Jul 9 2007, 10:34 PM) nicholas0507 how did you roll opamps? Roll all 3 with the same ones? currently i only try roll all 3 with the same,well...LM49720 is totally listernable than LM4562.Not LM4562 is less detail,it just produce a little bit different from sound signature...both these opamp can pawn ZL stock opamp easily,detail is every way,major different is only the vocal.LM49720 produce more upfront vocal than LM4562, and the vocal is more refined...i can different it when listern to piano track,every note is more detail and real... will try 2+1 later... Added on July 10, 2007, 10:09 pm QUOTE(walabies @ Jul 9 2007, 10:02 PM) Happy rolling hopefully can listern again sound from AD chip,me only 1 time to listern it before(yrh0143 punya) and almost forget it already... Describe the difference in your setups? Added on July 10, 2007, 10:14 pm QUOTE(Edwin @ Jul 10 2007, 08:32 PM) hey, mind to tell me where to get the LME49720NA? yrh0413 is rite....just go NS web join the samples program...Oh..ya...wana say thnks alot to yrh0413...thanks for sharing about samples program lastime...really appreciate ur sharing thanks..thanks..thanks.... This post has been edited by nicholas0507: Jul 10 2007, 10:15 PM |
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Jul 10 2007, 10:32 PM
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All Stars
12,214 posts Joined: Jan 2003 From: Singapore | Malaysia
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 aiseh man, i accidentally bump into their samples program last time. Then "stole" LM6172s, 4562s, and 49720s from them. |
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Jul 10 2007, 11:46 PM
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Senior Member
941 posts Joined: Nov 2005
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Can we still get free samples from National Semicon or other manufacturers? esp those audio IC we need.
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Jul 11 2007, 12:04 AM
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Staff
9,417 posts Joined: Jan 2003 From: Bladin Point, Northern Territory
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QUOTE(walabies @ Jul 10 2007, 09:55 PM) Are you really selling it 1k? It does cost an average of 800 ringgit a board to build. The PPAv2 is certainly a very high end amplifier, sports a discreet buffer, separate supply rails, multiloop feedback, FET input and noise reduction, class A transistor output and adjustable bias. Comparing it to amps out there, a good equivalent is a Headroom Max in terms of topology, and the Max goes for 4k ringgit.Maybe i'll sell it for 1.2 depending on my needs. Add 200 for a case and casework with nice jacks, add 60 for silver wire and 400 for a STEPS PSU. If you wanna go balanced it should be 400 for casework, 100 for Switchcraft XLR jacks, 800 for 2 seperate PSUs and 120 for a PEM Filter. That's about 3.4k for a balanced setup. But technically you'd have the ultimate headphone amp, even better than a PRII which goes for 1600 Ringgit unbalanced. |
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Jul 11 2007, 01:13 AM
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Senior Member
1,599 posts Joined: Jan 2003 From: Isketambola
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QUOTE(walabies @ Jul 10 2007, 09:55 PM) Are you really selling it 1k? It is truly worth the price. I can no longer go back to my PIMETA. Solid state amps of the same class would cost many times more. We're talking about a maxed-out PPAv2 here.Also I'd suggest uprading the wires. I put in those just for...testing. |
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Jul 11 2007, 02:07 AM
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Staff
9,417 posts Joined: Jan 2003 From: Bladin Point, Northern Territory
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QUOTE(Anwark @ Jul 11 2007, 01:45 AM) anybody here know where can i find opamp lm4562 soic and Blackgate 2200uF 16V at Jalan Pasar and how much will it cost Impossible LOL.You can get the LM4562 SOIC from Digikey and the Blackgates from Octave in Subang. |
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Jul 11 2007, 02:30 AM
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Senior Member
2,491 posts Joined: Jun 2006 From: KL
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QUOTE(walabies @ Jul 10 2007, 09:55 PM) Are you really selling it 1k? QUOTE(empire23 @ Jul 11 2007, 12:04 AM) It does cost an average of 800 ringgit a board to build. The PPAv2 is certainly a very high end amplifier, sports a discreet buffer, separate supply rails, multiloop feedback, FET input and noise reduction, class A transistor output and adjustable bias. Comparing it to amps out there, a good equivalent is a Headroom Max in terms of topology, and the Max goes for 4k ringgit. yeah, a full ppav2 built up from quality components should cost around 1K++ including the casing.. Maybe i'll sell it for 1.2 depending on my needs. Add 200 for a case and casework with nice jacks, add 60 for silver wire and 400 for a STEPS PSU. If you wanna go balanced it should be 400 for casework, 100 for Switchcraft XLR jacks, 800 for 2 seperate PSUs and 120 for a PEM Filter. That's about 3.4k for a balanced setup. But technically you'd have the ultimate headphone amp, even better than a PRII which goes for 1600 Ringgit unbalanced. discreet ppav2 should be cheaper though.. |
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Jul 11 2007, 03:59 PM
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Senior Member
6,934 posts Joined: Jan 2003 From: Audiophilia valley...
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This time really I must try it on the meet
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Jul 11 2007, 04:10 PM
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Senior Member
1,599 posts Joined: Jan 2003 From: Isketambola
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Staggered the Rodersteins too..
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Jul 11 2007, 07:24 PM
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Staff
9,417 posts Joined: Jan 2003 From: Bladin Point, Northern Territory
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Anyways i have a PPAv2, Sexy Red edition coming up lol
Kind of got that idea because all the caps were red.  I kind of wanna put her in a sweet red anodized aluminum casing.....but i can't seem to find one |
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Jul 11 2007, 08:04 PM
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Senior Member
4,234 posts Joined: Nov 2004
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dude
Don't finish your stocks yet!! leave some for me!! I'm still in the middle of completing the list. darn! |
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Jul 11 2007, 08:19 PM
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Senior Member
1,599 posts Joined: Jan 2003 From: Isketambola
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QUOTE(empire23 @ Jul 11 2007, 07:24 PM) Anyways i have a PPAv2, Sexy Red edition coming up lol Should've used Cerafine lytics for the bulk caps too Kind of got that idea because all the caps were red. http://i4.photobucket.com/albums/y122/Empire23/_MG_3740.jpg I kind of wanna put her in a sweet red anodized aluminum casing.....but i can't seem to find one This post has been edited by Eokboy: Jul 11 2007, 08:20 PM |
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Jul 11 2007, 08:23 PM
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Staff
9,417 posts Joined: Jan 2003 From: Bladin Point, Northern Territory
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QUOTE(Eokboy @ Jul 11 2007, 08:19 PM) Should've used Cerafine lytics for the bulk caps too Problem is finding the size for em if i can find em i don't mind using them. |
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Aug 9 2007, 10:30 AM
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Junior Member
108 posts Joined: Mar 2007
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Just finished my Onkyo SE-90PCI mod...
   This post has been edited by xneakers: Aug 9 2007, 10:32 AM |
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Aug 9 2007, 11:45 AM
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Senior Member
941 posts Joined: Nov 2005
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holy shit... is it a sound card ?
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Aug 9 2007, 12:54 PM
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Junior Member
108 posts Joined: Mar 2007
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QUOTE(wui223 @ Aug 9 2007, 10:45 AM) holy shit... is it a sound card ? Yes............. Haven't tried it yet... later lah.. dont have time... I finished around 10pm yesterday... |
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Aug 9 2007, 12:59 PM
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Junior Member
236 posts Joined: Jan 2003
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QUOTE(xneakers @ Aug 9 2007, 12:54 PM) Yes............. erm how much all this cap cost???Haven't tried it yet... later lah.. dont have time... I finished around 10pm yesterday... can intro wht cap and y those cap u using? hope still can plug in ur casing... This post has been edited by skydna: Aug 9 2007, 01:12 PM |
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Aug 9 2007, 01:41 PM
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Senior Member
8,046 posts Joined: Jan 2003
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QUOTE(xneakers @ Aug 9 2007, 10:30 AM) Just finished my Onkyo SE-90PCI mod... Wah!. I think it'll sound different with the huge output caps, but unsure what improvements can be heard with all the other caps. I sometimes think the original surface mounted caps are already good enough and changing them to others may not bring great benefit. The output cap does..though!. |
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Aug 9 2007, 01:54 PM
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Junior Member
108 posts Joined: Mar 2007
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Here's is the list:
* BlackGate F Series in main supply. * Rubycon ZL in DAC supply (upgraded from 330uF to 470uF) * Elna RBP2 in op-amp supply * BlackGate NX Hi-Q in DAC->op-amp coupling * SideRealKap in op-amp->output coupling * Some Rubycon ZA and Elna Cerafine (non-polar) in other sections |
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Aug 9 2007, 02:12 PM
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Senior Member
1,599 posts Joined: Jan 2003 From: Isketambola
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Film output caps on sound cards is win.
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Aug 9 2007, 02:41 PM
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Senior Member
947 posts Joined: Aug 2005
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hey xneakers thats one funki monki mod bro. im amazed there's enuff space in the mobo for those gigantus lateral facing caps! update us on the SQ improvements but do keep in mind that film caps may take quite bit to cook before sounding their best. Congrats!!!
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Aug 9 2007, 03:03 PM
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Junior Member
108 posts Joined: Mar 2007
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I may take 2 PCI slots I guess...
Those caps surely need break-in time... I havent change the op-amp... want to make sure the sonic characteristic first (I changed too many caps, cant figure out the result, could be good, could be bad...) |
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Aug 11 2007, 11:00 PM
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Senior Member
819 posts Joined: Jan 2003 From: Puchong
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I think its going to be 3 PCI slots...great mod though. Update on the results later
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Aug 11 2007, 11:51 PM
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Senior Member
5,211 posts Joined: Feb 2005 From: Konohana
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QUOTE(xneakers @ Aug 9 2007, 12:54 PM) Yes............. I would like to hear the result Haven't tried it yet... later lah.. dont have time... I finished around 10pm yesterday... |
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Aug 12 2007, 08:50 AM
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Senior Member
3,448 posts Joined: Jan 2003 From: Sarawak
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holy shit... haw haw haw!
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Aug 12 2007, 01:48 PM
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Junior Member
108 posts Joined: Mar 2007
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QUOTE(ijan @ Aug 12 2007, 07:50 AM) holy shit... haw haw haw! Wazzzzuppp ijan? |
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Aug 12 2007, 02:58 PM
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Senior Member
947 posts Joined: Aug 2005
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me thinks bro ijan is freaked out about your mod esp. for a mobo soundcard. to be honest, IMO its just a tad over kill if i may say so. but heyy as long as u enjoy it - its alllll good!
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Aug 12 2007, 06:51 PM
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Senior Member
3,448 posts Joined: Jan 2003 From: Sarawak
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no la, im amazed actually! makes me remember sum mods ppl made on gfx card, mounting sum insanely huge heatsink, then god knows how that the gfx can handle the weight. The onkyo looks like mushroom blossoming high end capacitors
the other reason i oooh was the big ass outptu decoupling caps! wish i haf them...ohhh ohhh ohhh. im with the idea that fcking bigger polypropylene, more ohh la la! |
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Aug 12 2007, 10:25 PM
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Junior Member
108 posts Joined: Mar 2007
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QUOTE(scottiebabie @ Aug 12 2007, 01:58 PM) me thinks bro ijan is freaked out about your mod esp. for a mobo soundcard. to be honest, IMO its just a tad over kill if i may say so. but heyy as long as u enjoy it - its alllll good! Overkill? Perhaps... but that didnt cost too much... ZL is very affordable... and so does Cerafine... the BlackGate F Series also quite cheap (it's an old stock stuff)... the 10uF SideReal Cap also very cheap (again it's my old stock stuff)... it costs me no more than 3.3uF Auricap... It looked overkill... but actually... it's quite affordable eheheh... |
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Aug 13 2007, 07:48 AM
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Senior Member
3,448 posts Joined: Jan 2003 From: Sarawak
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wish in malaysia it would be affordable, everything is jacked up here..
how much is the 10uf SideReal cap? if only can arrange cheap shipping from indonesia to malaysia...sigh.. |
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Aug 13 2007, 05:51 PM
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Senior Member
1,056 posts Joined: Oct 2004
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wah u guys are good
This post has been edited by hz428: Aug 13 2007, 05:56 PM |
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Aug 13 2007, 06:53 PM
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Junior Member
108 posts Joined: Mar 2007
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10uF SideReal around $20 I guess... mine is old stock...
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Aug 13 2007, 07:02 PM
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Senior Member
748 posts Joined: Jan 2003 From: KL
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wei ijan or empire23
about sound card ... how much to convert or h@ck my philips aurilum 805 usb sound card ... with better caps and whatever else that u think can be done with it also how much is it to built a better solid wood satellite and subwoofer box stock armageddon 5 kinda sucks for me wanna get a better set up quote me the rough price thx (now rushing to class will on9 from lab chat with u both in msn if u guys on9) |
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Aug 25 2007, 12:29 AM
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Senior Member
5,211 posts Joined: Feb 2005 From: Konohana
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Done something just now, I blow another SB Live! because of modding. Desperate to get a new card, I think of an old creative card from my Celeron 60oMHz Dell machine. I plug it in and it sounds horrible! I mod it, looks normal isn't it (except for the heatsink part)?
 Look closer, you can see (or blurry) LME49720 , it really is. I removed the stupid 4560 and hit it hard with a hammer and change it with this lovely opamp. Sounds a lot better than even the SB Live!. Detail just amazing, best part is, there's no low quality capacitor on this card! |
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Oct 10 2007, 05:01 PM
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Senior Member
1,037 posts Joined: Jan 2006
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QUOTE(yrh0413 @ Jun 27 2007, 11:22 PM) Songs tested: 1. Corrinne May - Angel in Disguise (Safe in a Crazy World) 2. Johann Strauss II/ Josef Strauss: Pizzicato Polka (Denon Hi-Fi Strings XRCD) 3. Pachebel: Canon (Denon Hi-Fi Strings XRCD) 4. Mozart: Sinfonia Concertante for Violin, Viola & Orchestra in E-flat Major, KV364 (320d) (Denon Hi-Fi Strings XRCD) 5. Il Divo - I Believe in You (Ancora) 6. Arne Domnerus - Limehouse Blues (Jazz at the Pawnshop Disc 1) 7. Diana Krall - Black Crow (The Girl in the other Room) 8. Jane Zhang - 我用所有报答爱(The Banquet) [/b] currently sitting in the opamp socket in my Heed: the 637s haha! |
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Oct 18 2007, 09:01 PM
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Senior Member
1,599 posts Joined: Jan 2003 From: Isketambola
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Super-Modded Chaintech AV-710
  Replaced stock G-Luxcon  caps with 22uF BlackGate NX Hi-Q at the output. 100uF Panasonic FMs bypassed with 0.1uF plastic for DAC. Input caps to the PS replaced with 470uF Pana FC. Output caps are 15uF Sanyo OSCONs, one bypassed with 1uF tantalum. Red wire ties 5V regulator output to 3.3V regulator input.  Damn, alcohol for cleaning flux blanked the warranty sticker... Based on thedoctor's AV-710 modding guide on Head-Fi: http://www.head-fi.org/forums/showpost.php...603&postcount=4 For him, modded AV-710 > EMU0404 when used with the PPA. So I'm psyched  The BGs only started burning in, but the power supply mods really cleaned up the sound. |
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Oct 18 2007, 09:14 PM
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Senior Member
3,448 posts Joined: Jan 2003 From: Sarawak
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niceee
but my experience with AV710 is as much as its modded, ur better off with a better stock source. |
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Oct 18 2007, 09:45 PM
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Senior Member
1,599 posts Joined: Jan 2003 From: Isketambola
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QUOTE(ijan @ Oct 18 2007, 09:14 PM) niceee What's a better stock source <RM200? but my experience with AV710 is as much as its modded, ur better off with a better stock source. |
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Oct 18 2007, 11:01 PM
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Senior Member
3,448 posts Joined: Jan 2003 From: Sarawak
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aaaaaaaaaaaaaaaaaaaa
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Oct 21 2007, 05:09 PM
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Senior Member
6,934 posts Joined: Jan 2003 From: Audiophilia valley...
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Ijan is spamming...
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Oct 21 2007, 05:26 PM
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Senior Member
1,635 posts Joined: Jan 2003 From: BASF Asia Pacific
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niec mod you got there goin. good job.
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Oct 28 2007, 02:51 PM
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Senior Member
3,448 posts Joined: Jan 2003 From: Sarawak
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Well, a forumers 1212m Rev.2 mug-ugly-shot..it aint pretty..
 2xSilver mica opamp power decoupling, and extra 1000uF 25V Nichicon MUSE KZ capacitors. My own 1212m mug-shot..soon to be crapped out with a new board..tunggu for part. Planning on putting 4-DIP, 4xsilver mica for each opamp and 2xsilmic 2s..  |
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Nov 19 2007, 10:09 PM
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Senior Member
4,234 posts Joined: Nov 2004
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HOLY SHIT, posted on my birthday and i do not know!!
Deserves a bump and a super praise!!!You're an epic winrar!! Seeing what you just did there, i really want to try some class A biasing and start modifying my EMU1212M, but sayang lah!! The opamp board is home etched? Looks great! |
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Nov 20 2007, 03:39 PM
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Junior Member
53 posts Joined: Nov 2007 From: L2 Lagrange Point
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Anyone modded Edifier speakers over here? ... specifically the S2.1D
I've got a major problem with factory applied epoxy/glue covering half the PCB. Suggestions? |
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Nov 21 2007, 10:03 PM
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Senior Member
3,160 posts Joined: Jan 2003 From: KLANG!
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hey ijan bro and all the sifu here, by anychance you guys can fix a car amp?
i got crack highs for example when pavarotti do his magic.... |
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Apr 16 2008, 03:54 PM
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Senior Member
5,211 posts Joined: Feb 2005 From: Konohana
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Behold! The world first (I think) dual to single adapter! Too lazy to buy the single version of LME49720, so I mod the socket itself to comply with single
The design, the bottom three pin on the right side of the opamp is bent: 
How it looks: 
Inside the DAC: 
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Apr 26 2008, 09:57 AM
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Senior Member
571 posts Joined: Aug 2005 From: 221B Baker Street
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wow wanna ask where u guys buy those Elna Cerafine cap and MUSE ... bcoz here selling not complete value that diyparadise selling mine to share .... tq tq
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Jul 13 2008, 09:43 PM
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Senior Member
5,211 posts Joined: Feb 2005 From: Konohana
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My new mods, single dual to dual single opamp
I solder it down to the socket to make it more secure, plus I put 20nF as a bypass on positive and negative rail to clear up white noise (as I read). Other mod that I done to this DAC is replaced all capacitor on digital circuit with Sanyo OS-CON 100uFx2 per hole (stock is 180uF) plus I change decoupling caps with 0.47uF Philips MKT (on the back of the though, its too big) |
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Jul 13 2008, 09:58 PM
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Senior Member
8,046 posts Joined: Jan 2003
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Goodness me?... your soldering?... could you do better and for goodness sake you could make use of solid core copper wires taken from Astro coaxial cable. Use your flat pliers to make straight links out of the coax. It'll look a lot neater.
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Jul 13 2008, 10:04 PM
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Senior Member
5,211 posts Joined: Feb 2005 From: Konohana
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QUOTE(bsl555 @ Jul 13 2008, 09:58 PM) Goodness me?... your soldering?... could you do better and for goodness sake you could make use of solid core copper wires taken from Astro coaxial cable. Use your flat pliers to make straight links out of the coax. It'll look a lot neater. Sorry, I lack of equipment, I just use anything that I have and what can I find, which is just my hand .....and a solder iron This post has been edited by Najmods: Jul 13 2008, 10:05 PM |
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Jul 13 2008, 10:09 PM
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Senior Member
8,046 posts Joined: Jan 2003
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QUOTE(Najmods @ Jul 13 2008, 10:04 PM) Sorry, I lack of equipment, I just use anything that I have and what can I find, which is just my hand .....and a solder iron Oh well, allow me to advise you that its all delicate inside there and hope you don't do like that all the time where damage to the PCB can be irreversible...more damage than good. Buy a soldering iron with different bits and make use of some solder flux to obtain a better soldering point. Practice makes perfect. Good luck man!. P.S. Truthfully I hate sockets and socketed chips. They just attract more noise. This post has been edited by bsl555: Jul 13 2008, 10:10 PM |
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Jul 13 2008, 10:13 PM
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Senior Member
8,186 posts Joined: May 2005 From: Beaumont, Baile Ath Cliath, EIRE.
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Good advice bsl!
pay attention, 'grasshopper'. (can't resist it!) |
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Jul 13 2008, 10:20 PM
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Senior Member
8,046 posts Joined: Jan 2003
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QUOTE(jazzy939 @ Jul 13 2008, 10:13 PM) Good advice bsl! Yes!.. nuture somebody into a real "modder" not "hacker"!. pay attention, 'grasshopper'. (can't resist it!) |
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Jul 13 2008, 10:43 PM
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Senior Member
5,211 posts Joined: Feb 2005 From: Konohana
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QUOTE(bsl555 @ Jul 13 2008, 10:09 PM) Oh well, allow me to advise you that its all delicate inside there and hope you don't do like that all the time where damage to the PCB can be irreversible...more damage than good. Buy a soldering iron with different bits and make use of some solder flux to obtain a better soldering point. Practice makes perfect. Good luck man!. Thanks for your advice P.S. Truthfully I hate sockets and socketed chips. They just attract more noise. I have still much to learn, I shouldn't mod in the first place, as I have been known to be impatience plus I have shaky hands. But well, my will is stronger than all of the limitation I'll buy the single version of it (LME49710) and solder them directly to the board without any sockets |
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Jul 14 2008, 10:59 AM
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Senior Member
3,448 posts Joined: Jan 2003 From: Sarawak
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Socket mmng intro noise, but offers flexibility and its like big PLUS PLUS to the ppl here apparently, they like trying out different opamps. What uncle BSL said was to do proper P2P wiring, but in his case, dun think the solid core of coaxial cable a good choice, no? its too big, maybe a good single core wire stripped might be okay, or leftover lead of resistors?
As uncle BSL said, practice makes perfect, proper tools help perfections and sum ppl might not agree, but to me, quality of equipment is really a big plus. Nice to see another fella taking a liking to making things to their liking. |
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Sep 15 2008, 03:46 PM
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Senior Member
571 posts Joined: Aug 2005 From: 221B Baker Street
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My Marantz CD5001 CDP mod still not complete yet not enuf parts ....
 My speaker passive crossover mod now waiting to buy for the LPF coil bcoz need to measure the mh value  This post has been edited by abel: Sep 15 2008, 04:00 PM |
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Sep 15 2008, 04:06 PM
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Senior Member
4,234 posts Joined: Nov 2004
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Najmods,
One problem with your mod. The caps should be mounted at the bottom at the PCB with shortest leads as possible. The way you're doing it wastes capacitance and adds uneccessary impedance (hence more noise). Proper bypassing mod should be done under the board or under the socket if you're good enough. EDIT: Why am i replying to a content months ago? LOL. Anyway nice mod bro. Personally I'm too lazy to do caps mod for my equipments. This post has been edited by LittleGhost: Sep 15 2008, 04:08 PM |
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Sep 15 2008, 06:01 PM
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Senior Member
1,347 posts Joined: Jan 2003
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littleghost,
no problem at all..ur reply is good also.. hhehhe now some comment om this mod i have done to my edifier. Posted this in edifier thread..no response loorrr Too bore while fasting...sleep too much also........what i did?? hehehhe mod my beloved Edifier E3100 Here is some info regarding mod i have done to my Edifier E3100.cheap stuff..but? Unbelieveable! Caps: 4700uf 25v Panasonic FCx2 100uf 25v Panasonic FM x3 22uf 25v Panasonic FC x1 0.68uf Epcos polyproplyene caps change ne5532 to socket with OPA2134 some extra padded sponge for extra deepness.hehehhe but i hate the burn in period aiihhh......... Emmm ..........what will happen if i change all that 5% ceramic resistor to metal resistor..emmm wait till im bored againlah......... **stay tune..some opamp rolling... opamp testing now is TLE2082..fuhhh!!  This speaker couple with modded AV-710..... 
This post has been edited by CV6149: Sep 15 2008, 07:45 PM |
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Sep 15 2008, 06:35 PM
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Senior Member
5,211 posts Joined: Feb 2005 From: Konohana
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QUOTE(LittleGhost @ Sep 15 2008, 04:06 PM) Najmods, Thanks for the advice, bro One problem with your mod. The caps should be mounted at the bottom at the PCB with shortest leads as possible. The way you're doing it wastes capacitance and adds uneccessary impedance (hence more noise). Proper bypassing mod should be done under the board or under the socket if you're good enough. EDIT: Why am i replying to a content months ago? LOL. Anyway nice mod bro. Personally I'm too lazy to do caps mod for my equipments. Yeah this thread is old and not many hits, but that is still a good adviceMany has happened since I last done that, I soldered the opamp directly to the socket, and I only uses one opamp per channel to reduce the 'brightness' of LME49720 This post has been edited by Najmods: Oct 26 2008, 01:55 AM |
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Oct 26 2008, 01:57 AM
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Senior Member
5,211 posts Joined: Feb 2005 From: Konohana
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I get a couple LT1363 (single version of LT1364) from Linear themself to try on my DAC. Installed it side by side with LME49720 (not pictured, I singled them and soldered it on the back of the PCB and bias to class A, its quite messy I don't want to show it
)Anything else, I have changed the cheap coaxial cable with a good thick one my father bought at JP, 2 meter long, soldered them directly from DAC to soundcard, before this I use RCA jack and cheap coax cable. Plus, I bypass the output caps properly now, it looks a lot better and soldered the RCA jack on the PCB itself, I want to reduce as much link as possible Any improvement? Yes, and hell a lot of it, I don't know where to start. With direct coax cable from the DAC to soundcard and direct RCA soldered on PCB, the blurry background detail is now very sharp and precise. When I soldered the LME49720 directly, it sounded a lot better, but with LT1363 accompany it (stock is Texas Instruments NE5534), it totally surprised me, its hair raising moments! The vocal locks tight in the middle, with very nice airy sound on the percussion, the guitar sounds fantastic I loved it, its less fatiguing when listening to long hours. I listening to my favorite singer, Marit Larsen now, its like a totally new experience, having vocal on its own layer, its just fantastic (eargasm ) A bit dusty, because I don't put the lid on |
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Oct 26 2008, 12:37 PM
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Senior Member
8,046 posts Joined: Jan 2003
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Whenever you replace NE553x or those jellybean NJM4558,2068,2114 with something better from NS or BB, you can be damn sure to hear a significant improvement. I can never accept any of those jellybeans in any of my hardware that deploy them.
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Oct 26 2008, 08:56 PM
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Junior Member
108 posts Joined: Mar 2007
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My last Aikido project...
Complete parts before connected...  Some combination in the components...  Well, the potentiometer and the output caps for driving my 32 Ohm Grado headphone...  Project on testing... 6N1P+6N6P and 5U4C rectifier...  The 6N6P... Russian, high power tube...  The DIY "monster" transformer... 300V-CT-300V/100mA (B+), 5V-CT-5V/3A (filament), 5V/3A (rectifier)... Completely oversized wire... the 3A rating is minimum, should be ok to be pushed into 5A (no voltage drop so far), still around 5.1-5.4VAC tested on 3A load...  Another shot from another side...  Rectifier changed to 5U3C/5U4GB... Even better sound...  This post has been edited by xneakers: Oct 26 2008, 08:59 PM |
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Oct 26 2008, 09:14 PM
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Senior Member
1,630 posts Joined: Jun 2006
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QUOTE(CV6149 @ Sep 15 2008, 06:01 PM) littleghost, I wonder where u get those caps. I am looking for the same value like yours.no problem at all..ur reply is good also.. hhehhe now some comment om this mod i have done to my edifier. Posted this in edifier thread..no response loorrr Caps: 4700uf 25v Panasonic FCx2 100uf 25v Panasonic FM x3 22uf 25v Panasonic FC x1 0.68uf Epcos polyproplyene caps change ne5532 to socket with OPA2134
Added on October 26, 2008, 9:21 pm QUOTE(LittleGhost @ Sep 15 2008, 04:06 PM) Najmods, I always see the Paper in oil PIO doing bypass for some of the power supply cap. The value is typically small like 0.033 uF doing bypass for the 330 uF power supply and even signal caps (isnt that bypass is for power supply). One problem with your mod. The caps should be mounted at the bottom at the PCB with shortest leads as possible. The way you're doing it wastes capacitance and adds uneccessary impedance (hence more noise). Proper bypassing mod should be done under the board or under the socket if you're good enough. EDIT: Why am i replying to a content months ago? LOL. Anyway nice mod bro. Personally I'm too lazy to do caps mod for my equipments. Can I know whow doesputting parallel a small cap to a big cap is a bypass? This post has been edited by ccschua: Oct 26 2008, 09:21 PM |
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Oct 26 2008, 11:13 PM
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Senior Member
4,234 posts Joined: Nov 2004
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paralleling small cap to big cap isnt really a bypass. That's a failed bypass imo.
Bypassing should be done CLOSE to the circuit, NEXT to the pins. This is to get low impedance for high frequencies as much as possible while avoiding lead inductance and noise pickup. Bypassing is also done for signals in the signal path because electrolytics simply arent low enough impedance for higher frequencies. EDIT: Bypassing for power supply is better known as decoupling. This post has been edited by LittleGhost: Oct 26 2008, 11:14 PM |
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Oct 27 2008, 10:46 PM
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Senior Member
1,630 posts Joined: Jun 2006
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QUOTE(LittleGhost @ Oct 26 2008, 11:13 PM) paralleling small cap to big cap isnt really a bypass. That's a failed bypass imo. "paralleling small cap to big cap isnt really a bypass. That's a failed bypass imo. " Bypassing should be done CLOSE to the circuit, NEXT to the pins. This is to get low impedance for high frequencies as much as possible while avoiding lead inductance and noise pickup. Bypassing is also done for signals in the signal path because electrolytics simply arent low enough impedance for higher frequencies. EDIT: Bypassing for power supply is better known as decoupling. I am confused with this state ment over "Bypassing is also done for signals in the signal path because electrolytics simply arent low enough impedance for higher frequencies. " I see a lot of bypass for power supply cap. These bypass cap is soldered underside of the PCB in parallel. For example I see this 4 units of OSCON 16V 100uF giving power supply to a DAC and receiver chip.  At the bottom of the PCB, the tantalum is added.  Can I know what cap is used for bypass, MICA or tantalum or film cap ? I seem to see a mixture, but not sure of which give wht sound. if bypass what is the value? is it by trial and listen or just take 1/1000 of it. If bypass for signal, is it true that Paper in oil give more warm. Please dont mind me asking, I am just a noob to diy. This post has been edited by ccschua: Oct 28 2008, 12:45 AM |
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Oct 28 2008, 09:06 AM
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Senior Member
4,234 posts Joined: Nov 2004
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QUOTE(ccschua @ Oct 27 2008, 10:46 PM) "paralleling small cap to big cap isnt really a bypass. That's a failed bypass imo. " Firstly, just "paralleling small caps to big caps is a failed bypass". Simply put, it's not enough to just "parallel them" alone. You have to make sure the smaller bypass (decoupling) caps are close enough to the main circuit such as the OPAMP.I am confused with this state ment over "Bypassing is also done for signals in the signal path because electrolytics simply arent low enough impedance for higher frequencies. " I see a lot of bypass for power supply cap. These bypass cap is soldered underside of the PCB in parallel. For example I see this 4 units of OSCON 16V 100uF giving power supply to a DAC and receiver chip. Can I know what cap is used for bypass, MICA or tantalum or film cap ? I seem to see a mixture, but not sure of which give wht sound. if bypass what is the value? is it by trial and listen or just take 1/1000 of it. If bypass for signal, is it true that Paper in oil give more warm. Please dont mind me asking, I am just a noob to diy. This is so that you give as low as possible impedance over a larger frequency of AC. Smaller film caps and other variants have a lower impedance at much higher frequencies comparing to big electrolytics. This is why we parallel them. Of course ideally if we have huge capacitance values of film caps we'll ditch electrolytics completely. However this is not the case and we still need electrolytics because they offer huge capacitance on a much smaller footprint. Looking at the pictures, only one thing to complain, LEADS TOO LONG. Not only you raise impedance but you also increase the susceptibility to magnetic field induced noise. So honestly don't follow whatever that guy did and if you want to make sure the leads are much shorter. Bypass caps just use whatever you see fit. I normally just use a maximum of three stages of caps. Silver micas are VERY good but they are usually too small in capacitance. I only use Silver Micas for the signal path usually for limiting bandwidth. As for power supply decoupling, my favourites are Metal Polyesters, Metal Polyproplenes, Ceramics (X7R, C0G/NP0 grade), and good quality Tantalums. I usually use ceramics and tantalums paralleled to electrolytics these days due to space constraint. Another good configuration would be metal Polyproelenes paralleled to electrolytics. The idea is to parallel these type of caps to electrolytics and yet make them very close to the main circuit that you're decoupling. The type of configurations is up to your tastes and depends on the circuit you're trying to decouple. |
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Oct 28 2008, 09:44 AM
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Staff
9,417 posts Joined: Jan 2003 From: Bladin Point, Northern Territory
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On the point of wires and lead lengths.
Just like i've always said, anything longer 5mm is an antenna. (although the real formula is Lamda = C / Frequency). Thus if you have a 15cm unshielded cable like many do with their Sun/Moon opamps, using the half wave model, generally 15 cm will net you about give or take 10 Mhz noise. The fact the wires are straight adds to the loop size where magnetically induced noise and electromagnetic radiation can go in. On the issue of caps i use large value silver micas but they cost a bomb which is hard to justify in the eyes of most of my customers, but i think Madman's Zero is one of the only mods in which i used them because he told me to go wild. Usually in signal path filters or for DC bypass. Just like any good Electronics person, choose the capacitor that fits the bill. |
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Oct 28 2008, 11:05 PM
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Senior Member
1,630 posts Joined: Jun 2006
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Sorry I jump the component.
DIODE, ULTRA-FAST, 1A, 1000V as compare to FAST UF4007, any gain or not. I was told putting the ultra-fast, <5nS will give tighter bass. Empy, the silver mica is daylight robbery. if it serve a purpose I dont mind. Can I use 220pF for the ZERO DAC signal decoupling or I just stick to the design 22pF silver mica. |
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Jul 9 2010, 09:00 PM
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Senior Member
1,254 posts Joined: Aug 2009
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fun stuff to do over your weekend =)
i did this mod because i cannot afford the expensive capacitors and opapms nobody taught me how to happy.gif just do it at own risk but it was fun! ok here is the original cheapo jamicon,wincap and some nichicon 
if you are noobie at this like me then you might want to do this soldering technique if you leave the solder there for too long, you might burn your precious component to desolder the original caps, first you must apply a little more flux cored solder on each leg real fast (don't let it get too hot) then you heat both legs stimutanously while using your fingers to pull the capacitor out over the other side. If you burn your fingers, it means its getting too hot =) so its a free warning. try to do this real quick (you can practice this with broken stuff if available) apply flux paste a little round the area before soldering helps not burning your components. do not worry about the mess, you can clean up with alcohol later. hehe i forgot that you need to source for capacitors of the same value before actually dismantling your sound card. i got most of my elnas and panasonics from old car cassette head units donated, stolen and discarded. =) i bought a few sblives from garage sales just in case i killed something, but i got right on the 2nd try. YAY! 
earlier, i put in big caps at the output but not really happening cause the sounds strange. you get most big difference if you change the caps at the output but if you change all, of course better la. don't let the 1 bad apple ruin your whole basket right? no? i don't know... i just try to hantam change as many as i can =) ok now comes the hard part. leave a small amount of solder on the holes from the previous cap or add some more until you can 'double' solder to melt both while pushing the new cap in from the other side. make sure you do it fast as not to burn anything. again, practice makes perfect! the suck suck thingy helps when you get to much solder on your crap. 
it might look like a random recap job but i started to replace caps from the big chip thingy to the outputs first because i do not have enough parts =( 
a few burnt fingers later (imanoob). i tested it on a 'disposable' computer. and HEY! it works on the first go! i don't bother to clean up hehe cause im lazy and went sampling sounds to songs on my headphones! wooo hoooo~ sounds great!!! sounds much more awesomer than the stock ones. 
no need long to 'burn-in' caps haha so fast rolling oledi. if you think you can help me improve my mod please do post replies! =) THANK YOU Najmods This post has been edited by beggarmaster2000: Jul 9 2010, 09:18 PM |
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Jul 9 2010, 10:00 PM
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Senior Member
5,211 posts Joined: Feb 2005 From: Konohana
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No problem, now here is some tips. To get the most from SB Live! you must use kX driver. Get it from here. Its a bit hard to use the driver but don't get ahead of yourself. Just use the stock setting first.
First after installing kX driver it will automatically change the default output to the rear channel (the black jack, not the green one). Why? Because the rear channel have separate Phillips DAC which are higher quality than the front AC-97 DAC Your card is CT4830 which is the older SB Live! model but everything should work. I have the newer SB0100 |
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Jul 9 2010, 10:04 PM
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Senior Member
1,254 posts Joined: Aug 2009
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QUOTE(Najmods @ Jul 9 2010, 10:00 PM) No problem, now here is some tips. To get the most from SB Live! you must use kX driver. Get it from here. Its a bit hard to use the driver but don't get ahead of yourself. Just use the stock setting first. version varies la! but i'll watch out for it =) i bought a few of it all no standard lol thanks newayFirst after installing kX driver it will automatically change the default output to the rear channel (the black jack, not the green one). Why? Because the rear channel have separate Phillips DAC which are higher quality than the front AC-97 DAC Your card is CT4830 which is the older SB Live! model but everything should work. I have the newer SB0100 |
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Jul 9 2010, 10:14 PM
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Senior Member
5,211 posts Joined: Feb 2005 From: Konohana
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Yea there is other version of the card as well, SB0220 etc. But the core component are all the same
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Jul 10 2010, 02:10 AM
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Senior Member
1,293 posts Joined: Mar 2005 From: Ladang
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QUOTE(beggarmaster2000 @ Jul 9 2010, 10:04 PM) version varies la! but i'll watch out for it =) i bought a few of it all no standard lol thanks neway watch the price you paid for the mod, if it cross over RM60~RM80, its better to get urself a PCM270X and it's sound better. |
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Jul 10 2010, 07:10 PM
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Senior Member
1,254 posts Joined: Aug 2009
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QUOTE(chchyong89 @ Jul 10 2010, 02:10 AM) watch the price you paid for the mod, if it cross over RM60~RM80, its better to get urself a PCM270X and it's sound better. heheh its almost free cause i scrap from dead stuffs =)
anyway i bought too many sblives just in case i screw up. but i haven't yet! so here is more entertaiment for you guys =) my cousin's xplod exploded YAY so here goes..... 
hmmn sounds MUCH better than original even though not change all yet and i'm getting better at it. so much fun! =) |
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Jul 12 2010, 11:51 PM
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Senior Member
1,254 posts Joined: Aug 2009
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ok i found some more parts for my crap
Attached thumbnail(s) 
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Jul 15 2010, 12:56 AM
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Senior Member
2,293 posts Joined: Feb 2006 From: Sarawak
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Where you guys get those caps and op-amps? Any shop to introduce around pj area?
i'm looking for such components |
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Jul 15 2010, 10:53 AM
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Senior Member
1,254 posts Joined: Aug 2009
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QUOTE(Cosef @ Jul 15 2010, 12:56 AM) Where you guys get those caps and op-amps? Any shop to introduce around pj area? hmmn i am poor, i just use 2nd hand parts scrapped from broken or dead or stolen hahai'm looking for such components sorry, but i hope this helps for your smaller scale mods and i also don't know where to buy those stuff other than rs-malysia and farnell which requires credits card |
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Jul 15 2010, 12:37 PM
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Junior Member
320 posts Joined: Oct 2006 From: KUL
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RS and Farnell got a few payment modes. Beside cc, you also bank in and mail them the bank in slip and M2U. Beside these 2 you can also find online at ebay, lelong, a few other web sites.
You can also find it at Jalan Pasar or Octave. There are many just use search to help you in this forum. |
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Jul 15 2010, 06:18 PM
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Senior Member
1,254 posts Joined: Aug 2009
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too aspensive la and limited range for begginers oct*ve,lel*ng bla bla ^_*
the market for this thing monopolice oleid =( |
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Jul 15 2010, 06:21 PM
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Senior Member
2,293 posts Joined: Feb 2006 From: Sarawak
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Thanks for the info...
Will try to search it again at Jalan Pasar... |
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Jul 15 2010, 06:24 PM
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Senior Member
5,211 posts Joined: Feb 2005 From: Konohana
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QUOTE(Cosef @ Jul 15 2010, 06:21 PM) Thanks for the info... Don't expect to find high quality product at Jalan Pasar. If there is some of those boutique caps/opamp you find, there is high probability that its fakeWill try to search it again at Jalan Pasar... |
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Jul 15 2010, 06:53 PM
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Senior Member
2,293 posts Joined: Feb 2006 From: Sarawak
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QUOTE(Najmods @ Jul 15 2010, 06:24 PM) Don't expect to find high quality product at Jalan Pasar. If there is some of those boutique caps/opamp you find, there is high probability that its fake Yea agree...but fake op-amp i never seen before...op-amp like LT1364 and LM4562 maybe need to try my luck. |
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Jul 15 2010, 06:57 PM
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Senior Member
2,109 posts Joined: May 2008 From: Ipoh/Semenyih
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@Cosef:I think at here can find,around RM20 per piece..for LT1364 IINM.
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Jul 15 2010, 09:35 PM
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Senior Member
2,293 posts Joined: Feb 2006 From: Sarawak
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Jul 16 2010, 04:50 PM
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Newbie
3 posts Joined: Jul 2010
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Does anyone own an Auzen card ? Here's my mod.
This post has been edited by modteam: Jul 16 2010, 04:59 PM Attached thumbnail(s) 
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Jul 16 2010, 05:19 PM
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Senior Member
5,211 posts Joined: Feb 2005 From: Konohana
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Welcome to the forum
Those are fine mods, even you change the tiny and almost-impossible-to-change SSIC opamp! But the adapter for discrete with MCap is a bit too long. Where did you get those components, especially that discrete opamp DX2010? |
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Jul 16 2010, 06:01 PM
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Newbie
3 posts Joined: Jul 2010
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QUOTE(Najmods @ Jul 16 2010, 05:19 PM) Welcome to the forum Yup, abit long, but is intended, cos don't want to affect the resale value Those are fine mods, even you change the tiny and almost-impossible-to-change SSIC opamp! But the adapter for discrete with MCap is a bit too long. Where did you get those components, especially that discrete opamp DX2010? The DX2010 are from DEXA Technologies, brought it from parts connex. Planning to mod the clock by using audio-gd's Low Jitter Clock, but still figuring how to do that. Any ideas? This post has been edited by modteam: Jul 16 2010, 06:07 PM Attached thumbnail(s) 
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Sep 13 2010, 11:38 PM
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Senior Member
2,293 posts Joined: Feb 2006 From: Sarawak
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Just done some Op-Amp mods on the Onkyo SE-200PCI, using LME49720
 Heres the materials Before:   After:    There are a lots of improvement there...sounds really nice now |
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Sep 14 2010, 12:10 AM
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Senior Member
5,211 posts Joined: Feb 2005 From: Konohana
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^Nice mods, since now its socketed, its roll time baby
Some of my recommendation are LT1364, LT1361, and AD8599 (but AD8599 only available in SOIC so you need another adapter) |
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Sep 14 2010, 02:32 AM
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Senior Member
2,293 posts Joined: Feb 2006 From: Sarawak
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QUOTE(Najmods @ Sep 14 2010, 12:10 AM) ^Nice mods, since now its socketed, its roll time baby I had LT1361 on my hand but didn't tested on the sound card yet but on pc speaker i had. LME49720 i found myself it sounds better to me compare to LT1361. LT1361 sound too harsh and lack of details and dynamic when i compare both of it without burning in yet. Some of my recommendation are LT1364, LT1361, and AD8599 (but AD8599 only available in SOIC so you need another adapter) Haven't tried LT1364 and AD8599, the adaptor i can't find it in farnell, what will be the SOIC adapter called? This post has been edited by Cosef: Sep 14 2010, 02:35 AM |
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Sep 14 2010, 02:45 AM
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Senior Member
5,211 posts Joined: Feb 2005 From: Konohana
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QUOTE(Cosef @ Sep 14 2010, 02:32 AM) I had LT1361 on my hand but didn't tested on the sound card yet but on pc speaker i had. LME49720 i found myself it sounds better to me compare to LT1361. LT1361 sound too harsh and lack of details and dynamic when i compare both of it without burning in yet. It depends on application and the location, some might work great, some might not. You could mix the LT1361 and LME49720 on the card. Haven't tried LT1364 and AD8599, the adaptor i can't find it in farnell, what will be the SOIC adapter called? The adapter is called SOIC to DIP adapter. I don't know if they sell it or not here. Looks something like this:  |
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Sep 14 2010, 03:04 AM
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Senior Member
2,293 posts Joined: Feb 2006 From: Sarawak
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QUOTE(Najmods @ Sep 14 2010, 02:45 AM) It depends on application and the location, some might work great, some might not. You could mix the LT1361 and LME49720 on the card. Maybe LME49720 work great on my setups, if hand itchy will try find another one to swap it out The adapter is called SOIC to DIP adapter. I don't know if they sell it or not here. Looks something like this: Thanks for the info, been searching around farnell, seems i can't find it there. Mind to tell us where did you find that adapter? |
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Sep 14 2010, 02:55 PM
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Senior Member
5,211 posts Joined: Feb 2005 From: Konohana
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QUOTE(Cosef @ Sep 14 2010, 03:04 AM) Maybe LME49720 work great on my setups, if hand itchy will try find another one to swap it out You could try here Thanks for the info, been searching around farnell, seems i can't find it there. Mind to tell us where did you find that adapter? |
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Sep 14 2010, 09:59 PM
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Senior Member
2,293 posts Joined: Feb 2006 From: Sarawak
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Thanks for the info....
I think i need to find myself a credit card or paypal now Added on September 15, 2010, 2:39 amTry test again replace the sound card last 2 op-amp to LT1361, the overall details really blurred out, like cannot express the music, hardly listen to the details of every instruments, only the main played out, is that called the octave? Something like echoes of the sound when you pull the string of the guitar. I only got that 2 models to test out so far, and LME49720 i had the best for in hand now.  Anyone tried AD797? This post has been edited by Cosef: Sep 15 2010, 02:39 AM |
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Nov 16 2010, 04:25 PM
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Junior Member
311 posts Joined: Sep 2009
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QUOTE(xneakers @ Jun 26 2007, 12:40 PM) Joining... bro, how did you remove all the capacitors so neatly..not even scratching the PCB?My current mods (unfinished): Onkyo SE-90PCI (all capacitors except the OS-CON removed)... any tips or suggestion? |
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Nov 16 2010, 08:05 PM
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Senior Member
1,162 posts Joined: Sep 2008 From: PJ
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I have read about this fine OpAmp AD797BRZ, available locally at RS Online for less than RM80 each. It has received high regards from the Distortional Test report. (Operational Amplifier Distortion by Samuel Groner).
Perhaps it is a good Amp to mod to ? |
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