McIntosh MC2152 power amp technical question


My MC2152 suddenly acting up. When I use the XLR input the right channel makes popping sound when power off. To make the situation worst, the sound coming from this right channel is slightly lower compared to left channel which resulted in uneven sounds: left sound louder than right. IF I use the RCA interconnect the sound is fine and no speakers popping noise when powered off. I can settle by using the RCA interconnect and move on but i want to use the XLR input for better sound quality.  

Could it be the XLR right channel input connection defect? Or the electric board holding the XLR right input is defect?  Any technicians here in the community, your inputs would be greatly appreciated.  

thank you in advance for all your suggestions/help. 
kentrent

Showing 3 responses by normansizemore

I used to own a ton of Mac.  Send it in! If it is a manufactured fault they will repair it for free, regardless of how many owners there have been.  If you have to pay for a repair, it will be done right and with a warranty.  Their rates are no more than your local repair shop. At least that has been my experience.  They are awesome to deal with.

N.
I am really surprised at Macs response to your service question.  For decades, no matter who owned the unit, if it was a manufactured defect, they fixed it.  Period.  Additionally, their service rates were always in line with third party service agencies, and Mac service was top drawer.  Obviously, the end of an era for Mac, and a huge disappointment to those that have supported the brand.  
mrdecibel is of course correct.  However being in my late fifties, I harken back to the McIntosh of old.  I have owned a MA-6100, C-26, C-27, C-28, C-29, MC-2300, MC-2105, MC-2505, MR78 and none of it purchased new.
When I bought my MC-2300, it was nearly 10 years old, had a little noise in one channel. I called Mac, they sent me a shipping crate, a box and instructed me on how to pack it.  (I paid for those materials).  They repaired the amp and provided notes and test results.  It had a bad filter cap (about the size of a beer can) which they replaced at no cost.  They also replaced the good caps so that everything was a matched set. My 2300 was an early run, so my cap issue was a known problem which was remedied in later production.
So, because of that there was no cost to me.  That is the McIntosh that I am talking about.  First rate products, impeccable build and stellar service.
They are still the ones I would send my amp too, but their response to you clearly indicates that the old way of standing behind their products is gone.  I guess that it being “Mac” I expected more, I think anyone who’s buys Mac expects more.