my amp is Adcom GFA-555 MKII

hmm

just now the sound changed again lol.. hmm overall is nice but just lack of abit high frequency extension.. probably its due to the obbligato copper caps..

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Added on October 6, 2009, 12:58 ami know a bit only.. may b not as u... hmm i see ur setup oso got mods wat.. i tot u know some of it too?

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Added on October 6, 2009, 1:06 amhey ... i got some updates regarding to my esi Juli@ sound card.. previously i use SANYO oscon for all of the caps...

after power amp burned in.. sound lack of high frequency extension...

the oscon cap was located as input bypass b4 the 5V regulator.. it is replaced by Rubycon ZL 10v / 220uf instead of oscon.. only 1 cap need to be change...
ZL i is a kind of brighter resolution.. too much of ZL is no good for EAR loll.. especially with bright systems...

now temporaily the high frequency just being release from the prison or FRIDGE LOL..

thank you...

This post has been edited by vir___killer: Oct 6 2009, 01:09 AM

i dun dare to touch the DC biasing stuff.. Cos tat must need to a CRO for it la.. Wrong bias can burn the transistor..
haiz i put back my juli@ rubycon ZL cap to oscon edy.. cos it sound dull bcos of the blackgate has not full burned..
now still waiting for my blackgate N to be stable 1st.. i ask my fren he say it has to be 500hours like VCAP..
so.. just stay calm lo..

by the way, i m preparing my next project DAC with TUBE OUTPUT STAGE ehehe.. sounds good HA??

I want to make it like this.. but mine will using most audiophile parts for it.. HEHE..

This post has been edited by vir___killer: Oct 9 2009, 10:32 PM


Attached thumbnail(s)

i think 12AT7(ECC81)

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Added on February 13, 2010, 7:52 pmi sell out my stupid solid state adcom gfa-555 and harman kardon citation 25 edy.. haha now change to tube.

now my amp is this

100% TUBE SOUND SATISFACTION

This post has been edited by vir___killer: Feb 13 2010, 07:59 PM