Sansui AU555a and a basic restoration

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yak66

Member
Joined 2014
I just bought a Sansui AU555a
I do not know his story
I know, there are many 3Ds
I read enough
I did not find the electric scheme - diagram
I would like to do only a basic restoration (for now)
The problem is that the low frequencies seem not very precise and defined.
do you have any advice?
Thank you
 
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mbz

Member
Joined 2013
Run the amp as a separate PRE/POWER amp to try and localise problems
(bass response...) as a pre or power issue. Expect power amp stage.

Specifically for bass response, change main filter caps 2200uf/63V to
something like 6800uf/63V Nichicon KW. Also the coupling caps C819, 820
1500uf/63V to something like 3300uf/63V KW. I made these changes on an
AU-505, seems ok.
 
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