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Buzzing from speakers. Where is it coming from?

I can hear buzzing from the speakers's tweeter when I put my ears up to it. Can't hear it from the listening positon. Speakers are Vienna Acoustics connected to a Mcintosh MC402 amp via a Pionner reciever as a pre/pro. The Mcintosh is directly plugged into a wall outlet. The Pioneer is plugged into a Monster power conditioner. I have tried just turning on the Mcintosh with no signal and it still has a buzz. Then tried plugging it into the line conditioner and still buzzing. Lastly, I tried connecting the speaker to the Pioneer and still has buzzing but slightly quieter. The buzzing occures with all speakers. The Mcintosh powers the fronts. The Pioneers powers the center and rears. Any suggetions?
Thanks
vuongd
timrhu
2,779 posts
 
In that case I agree with Elizabeth.
BTW, I'm using class D amps also. They are dead quiet when idle.
erikminer
433 posts
 
If it's a buzz then it's a ground loop of some sort. Or if as you say it's pretty constant I'd look at things like light dimmers, or something else throwing a lot of noise, cable boxes are notorious for that sort of thing.
vuongd OP
6 posts
 
Yes, it is close to my sat. box. I can't move it out of the way though. Thanks everyone!!
erikminer
433 posts
 
Try lifting the ground on the power amp.
magfan
1,583 posts
 
I'm sorry, I don't mean to mock anybody, but people go to incredible lengths to optimize and choose cables, connectors room treatments, racks and any of the hundred and one things affecting sound.
Some items are pretty...shall I say....esoteric? The differences in cables, some would say is pretty small while others call it titanic.
I'd say that any tweeter hiss is on the intolerable side.
A BUZZ from the tweeter? Shouldn't that be a HISS? I'd expect the BUZZ thru the woofer.

Start going thru the list by first disconnecting everything and if the hiss goes away, reconnect 1 item at a time till it returns.

This is the worst thing to track down. I'm betting on the Sat Box, which has lots of RF circuitry and are notorious for spewing it everywhere. My sat box is a good 3 or 4 feet from anything stereo related.
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