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McIntosh amp probs.
http://4g61t.org/forum/viewtopic.php?f=28&t=5468		 Page 1 of 1
Author:  socrateez [ Sun Sep 28, 2003 2:59 pm ]
Post subject:  McIntosh amp probs.
I have a McIntosh 4 channel amp. 50Wx4 Was given to me a long time ago. I opened it up and the main power trace on the board was melted. I resoldered it and now the amp works. Problem is that it works with only two inputs. I have two tens hooked up bridged to channels 1&2, 3&4. It puts out a rythmic thump thump thump over the music if i plug the signal inputs into channels 3&4. 1&2 sound fine. What could be causing this? Is it fixable? I looked this amp up on the web and seems to retail for over $1200. :o
Author:  pumaproton [ Sun Sep 28, 2003 4:52 pm ]
Post subject: 
$1200 for a 4x50watt? They're usually pretty much free here :)

Sounds like PSU dead, or if it's a shared PSU between the amps then the amps dead. Sounds like a typical amp fault, oscillating at a low frequency.

Chances are someone has shorted the output, blew an amp chip which fried a track as well.

If you want it fixed, give me a PM, I built my own last year.
Author:  socrateez [ Sun Oct 12, 2003 8:46 am ]
Post subject: 
Something else strange. I noticed that i have bass coming only from one channel. High freqs from the other three. Swapping inputs around changes nothing. This thing booms from one channel tho!
Author:  Silforty element [ Mon Nov 22, 2004 4:25 am ]
Post subject: 
mc's were once one of if not the best amps around. old school ones are pretty much priceless
Author:  Loud Brown Kicker Colt [ Mon Nov 22, 2004 4:56 am ]
Post subject: 
I'd bring it to a reputable electronics tech,and have it repaired.
Mac is the shiznit!!
Author:  x-pride [ Thu Dec 23, 2004 11:02 am ]
Post subject: 
Sounds like your circuits are crossed in your amp. By switching the input tells you that your freq. is messed up in your amp. If you really like the amp I would take it in and get it repaired. It might be cheaper just to buy a new amp.
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