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...

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.

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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

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

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

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

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!

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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

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

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.

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

whaddaya expect, datasheet topology laaa

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

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...

holy shit... haw haw haw!

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!

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..

niceee but my experience with AV710 is as much as its modded, ur better off with a better stock source.

aaaaaaaaaaaaaaaaaaaa

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..

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.