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

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 >_>

Owner? Is this mine one u mentioning?
Looks similar...

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.

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

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

xneakers : SALUTE

your caps replacement is...=P super power...

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...

xneakers after finish mod ur onkyo remember to write a review before and after to share with us........

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

Pictars? Dude you have any ops for us? Ordering online is damn exp...

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!

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

Gud gud, I wanted the 4562. Where you bought them? Yuheng also want 4562, lack of stocks...

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?

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

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

ad dy2000 and lme 4562 also lme49720...hehehe..wanna try..well...i only live with burrbrown opa....

You can post to me anytime, but can I return it to you are 16 July? I will be at KL that time.