adcom 555 mk 11

nodoubt45 · 2nd January 2010, 12:21 AM

right channel sounds muted but still plays......any ideas where to start?? also, any way to tweak the old girl while im in there for a few more ponies??......thanks and great forum....

SQLGuy · 2nd January 2010, 03:31 AM

See post about two steps up that also talks about this amp.

As for upgrade... the one thing I'd seen done was to replace the stock transformer with a pair of 500VA (or bigger) stacked toroids, to convert it to dual mono. That might raise the 4 Ohm power a bit, but it's still not going to give you too much more. The main benefit would be the extra channel separation at LF and high power. On the other hand, most off-the-shelf toroids are not potted, so you'll probably gain some mechanical noise by going from the stock transformer to a non-potted aftermarket.

2nd January 2010, 12:21 AM	#1
nodoubt45 diyAudio Member Join Date: Jan 2010	adcom 555 mk 11 right channel sounds muted but still plays......any ideas where to start?? also, any way to tweak the old girl while im in there for a few more ponies??......thanks and great forum....

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2nd January 2010, 03:31 AM	#2
SQLGuy diyAudio Member Join Date: Jan 2009	See post about two steps up that also talks about this amp. As for upgrade... the one thing I'd seen done was to replace the stock transformer with a pair of 500VA (or bigger) stacked toroids, to convert it to dual mono. That might raise the 4 Ohm power a bit, but it's still not going to give you too much more. The main benefit would be the extra channel separation at LF and high power. On the other hand, most off-the-shelf toroids are not potted, so you'll probably gain some mechanical noise by going from the stock transformer to a non-potted aftermarket.

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