Low level buzzing coming from tweeters.


I now have a low level buzzing coming out of my tweeters even when i am in mute. It happens even with the amp on and preamp off never had this before.Any suggestions would be great.Thanks in advance.
ebm
Switched the amps between the tweeters & woofers. Buzz was originally from the tweeters. The buzz now came from the woofers, tweeters silent.. Gotta be the amps?
 I have a pair of atmosphere m60s and had that problem and it turned out to be an input tube.  I also have a LuTron dimmer in my room and whenever the lights are on I get a little buzz as well.
@atmasphere Thanks for the confirmation.

@analogluvr  At your suggestion, I changed the input tubes. No luck. I also have a Lutron 4-zone dimmer, but no change with the lights on or off.

Very frustrating, as you can imagine.
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