Help with McIntosh Repair Facility

Have you tried the different 2 - 4 - 8 ohm speaker taps to see if the low output follows? 

Switch which inputs? You mean to another input or left to right? If left to right inputs cables fixes anything, how does that equal to an amp problem if ANY cable change fixes it. For some reason either I’m not understanding your description of the problem or the problem is a cable. What is the source?

I’ll say it again 500.00 is the norm for a Mac repair. With a transformer add 5-700.00. IF more than one failed I’ve never seen that either.. 50 years with Mac for me.. Currently 30-35 pieces of Mac gear I’m running lowered stock these days. :-)

Is there a RCA vs XLR switch, in the mid position or WRONG position, some weird thing like that? There is no frayed cable or any broken "LOOKING" cable. Input or speakers, not a single strand of wire anywhere is touching?? You ran YOUR hands overs every cable with a cotton glove. It will snag if there is a problem. A pair of cotton gloves is pretty cheap..:-)

Regards

Bobthetechaudio.com.  I have an amp there now undergoing diagnostics.  Bob is very easy to communicate with.  

or audio classics.

I switched the left and right XLR inputs at the amp and the meters are reading the same now. I don't even have to look at the meters and can tell the sound is balanced which is just weird. The cables are fine and no fraying. The XLR/ RCA switch is in the correct position. My source is a LUMIN T2. 

I do agree his prices are ridiculous and I'm looking elsewhere. Definitely calling Audio Classics Monday. The only downside is shipping costs which will be expensive.  

Thanks Laps I'll reach out to your guy also.