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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 11 responses by kentrent

kentrent OP
71 posts
 
McIntosh said to being in for service and who knows how much they’re going to charge. Arm and a leg!!! 
kentrent OP
71 posts
 
swapping cable and its move the left: meaning when i switch the cable to left speaker (with the right jack) the problem deferred to the left channel.  Which means the right channel input jack is something wrong. 
kentrent OP
71 posts
 
Yes, this is the 70th anniversary edition.  McIntosh is not very helpful and not backing up their products.  I called and they dont help me troubleshoot, all they want is for me to sent in for service.   I bought it second hand so they said warranty is not transferrable.  
kentrent OP
71 posts
 
@normansizemore  i spoke with them this morning they told me no warranty since im not the original owner. I’m not sure if this is a defect or not.  So you dont think their repair rate not that more expensive than local McIntosh service? 
kentrent OP
71 posts
 
No guys.  Even not connected to preamp still making popping sounds to the right channel. I’m bringing to mcintosh service center.  McIntosh don’t recommend sent it in because its so heavy and transit across country could damage the amp. 
kentrent OP
71 posts
 
@mrdecibel they didn’t wanna take it. They told me to bring to near by service center.  I want them to fix it but they don’t want to - they basically steer me away from sending in.  Most big companies will honor warranty regardless of how many owners.  Take Apple for example, iPhones warranty follows the phone regardless of how many owners.  I’m just saying this is a $15k amp and it’s only 8 months old.  
kentrent OP
71 posts
 
@normansizemore yes i am very shocked to find out too.  This is an expensive unit and they didn’t offer me any help at all.  They told me warranty is not transferrable and that’s the end.  Even when i asked to sent in they tried to steer me away.  The whole thing i didnt feel like they’re really stand behind their products.  I am very disappointed in the way they handle this situation.  Usually every other company warranty go with the item until end of warranty term regardless of owner.   Anyone else have any input about this?? 
kentrent OP
71 posts
 
@normansizemore that’s exactly i would expect from Mac too. To stand behind their products and people buy an expensive product  they expect stellar service.   Like luxury cars and Toyota.   I’m disappointed in Mac.  Prolly wont buy anything from them anymore.   
kentrent OP
71 posts
 
@basilandco i bought the amp used from another seller.  Not from an actual McIntosh dealer hence why I didn’t get warranty. But im disappointed that warranty doesn’t follow the amp.  Its follow one owner and thats it not transferrable.  Now i left with a defective amp that doesn’t work as it should.  
kentrent OP
71 posts
 
@gphill I already did. Its in the shop and they’re still haven't able to perfected it.   Something wrong with the circuitry and its making the speakers pop and high distortion.  What’s making me upset is they’re keep telling me its normal and i know its not.  Really crappy job and they’re calling themself authorize McIntosh service center.  
kentrent OP
71 posts
 
@gphill who is audio classics?? 
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