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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
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.
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.
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.
andrewkelley
275 posts
 
Just plug in the amp somewhere else. That fixed my buzz. 
afmartucci OP
13 posts
 
I tried. It did not fixed the problem
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