Help with McIntosh Repair Facility


My MC452 is having an issue with the right channel that's a little weaker than the left.  Not by much but definitely noticeable.  Have been trying to diagnose the issue and everything so far points to the amp. I'm using XLR and have changed ICs , preamp tubes, cleaned amp inputs, etc.. but the head scratcher is if I switch the right and left IC inputs on the amp the sound or output is balanced. The meters are in alignment as they should be. The only issue is of course the right and left channels are opposite now.   I've spoken with an authorized repair center and bench testing is $350 and worse case scenario the board needs replacing plus labor can hit $2500 which in my opinion is ridiculous.  Has anyone experienced this issue or have any ideas or know of a reputable or more cost effective repair facility? I'm in Lexington KY.  Thanks in advance.  

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I live in Kentucky,got a good contact. He's retired now but,he might have some suggestions. The bottom cover may need taken off and check the terminals. My MC 500 got a little lose. How long has this been happening. Do you disconnect it often?

Mntyh please shoot me a PM. I do not disconnect it often. Only recently trying to figure this issue out. I’m in Lexington.

 

Took the top center cover off today looking for anything obvious but all connections were tight. I just dusted and wiped down what I could but issue still exists.  

I live in Lexington too, what about Barney Millers? They are a McIntosh dealer now.

They used to have a good service department as well.   

 

@loveallaudio I called Barney Miller and they can't work on it. Actually talked to the service department and he really offered no suggestions other than McIntosh.  

 

Where in Lexington are you?  I'm in Hamburg.