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Help! Is my new McIntosh MA12000 broken?

Hi, can you please help me?

I bought my first McIntosh amp, MA12000 and it is making a pretty loud hum.

It does not come from the loudspeakers.

The hum comes from the amp itself. 

With or without any sources connected to the amp make no difference to the hum.

I`m a bit surprised that such an expensive amp is so noisy. 

Do you think there is something wrong with the amp or is it supposed to make that humming noise?

Any and all answers are very much appreciated.

hifilover87
toro3's avatar
Ag insider logo xs@2x
toro3
301 posts
 

I had significant transformer hum from my small tube amp when I moved to a new residence years ago. Purchased the Emotiva CMX-2, which completely addressed the issue. Worth a try. 

 

 

hgeifman
2,110 posts
 

+1, “Contact your retailer and have them take care of the problem for you”. 

This might be better than my previous suggestion of using a DC Blocker. Your Retailer should know the best way to handle this. Please keep us posted.

steve59's avatar
steve59
1,640 posts
 

unit should be dead silent, return it for inspection and don't accept any BS excuses.

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mofojo
2,171 posts
 

Sounds like a pain but at least the eventual outcome was good. 
 

to those talking DC on the AC lines. Curious…. Can that be measured with a meter or need something like a scope? 

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