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Buzz on the Twitter

I have just upgraded my amplifter. I was using a MAD m25 after my NAD m17.
since I replaced my amplifier for a Classé sigma amp5. Witch is great. But after I replaced it I noted a Buzz on the Twitter. I replaced back my NAD amplifier and I realized it has alway been there, but I almost couldn’t hear it. Now the buzz is louder and intermittently it gets louder.

what may be the problems?
anyone with same issues?

i am using 
NAD m17
classe sigma amp 5
BW 803d2 for front speaker and nautilus 805 for surrounds

afmartucci
5 responses Add your response
afmartucci OP
13 posts
 
I tried. It did not fixed the problem
andrewkelley
275 posts
 
Just plug in the amp somewhere else. That fixed my buzz. 
kalali's avatar
kalali
1,977 posts
 
“... Now the buzz is louder and intermittently it gets louder.”
A constant buzz could be ground loop related unless you can actually hear a buzz when you put your ear next to the amplifier transformer. A variably intermittent buzz is more like a bad transformer or poor ground connection somewhere in the Audio chain. Try disconnecting the preamp and run the amplifier by itself and see that makes a difference in the loudness of the buzz.
afmartucci OP
13 posts
 
I am using balanced cables and the buzz is still present. I have already tested for ground loop but it is not a ground loop.
ebm
9,311 posts
 
Are you using balanced cables i had a low level buzz when i went balanced it went away.Hope this helps.
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