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Buzzing just won't quit: Can someone please help?

Hello,
First let me thank you for taking the time to read my post. I’ve been trying to get this buzz out of my system that I just can’t lick. It’s really starting to drive me nuts. Here is a spectragraphic image of the sound https://imgur.com/a/xREqG. Here’s a WAV of the sound: https://drive.google.com/open?id=0B_YygM_VDhV9RWlPMEVudjBnb28 

My system:
Bryston BP17 preamp
2x Schiit Vidar poweramps, running in monoblock
Sonus Faber Venere 3.0 speakers.
Velodyne DPS10 sub
Schiit Gungnir MB DAC
Music Hall MMF 2.3 TT
Marantz NR-1604 AVR, w/ Roku, CC, and Blu-ray
Samsung Plasma TV
No cable

Facts:
- All devices are on the same circuit.
- The buzzing comes through on LR channels (powered by Vidars) and powered subwoofer, BUT NOT through the surround sound speakers, which are powered by the AVR.
- Poweramps, preamp, AVR, and TV are all on the same plug (via ATC power conditioning strip)

What I’ve tried:
-I have physically disconnected EVERYTHING except the poweramps and the speakers. Everything was unplugged and disconnected EXCEPT the poweramps to the speakers (Wall > Vidar amp (no input) > Venere speaker). Subwoofer unplugged/disconnected. This made no difference.
- I’ve tried an Ebtech HumX hum eliminators on the amps. Did nothing (though it did wonders for my plasma TV).
- I’ve tried switching around to different wall outlets (though all are on the same circuit).

What I’ve determined so far:
- The problem ISN’T the Schiit poweramps. I know this because I hear the buzz coming through the sub, which has its own power.
- The problem isn’t due to the 10000 devices I have because it occurs even when the entire system is disconnected except amps and speakers (with no input in the amp).

So what can I do? Is there some kind of fancy "power conditioner" thing I can buy? One of those Blue Circle Thingees? If I buy a power conditioner, does it have to have regeneration? Would something like a Panamax M5300-PM or something like that be adequate?

Please help me!
naseltzer

Showing 2 responses by elevick

elevick
2,636 posts
 
Since you hear this through your sub too, I would try this:  Take either the sub or your power amps and speakers to the other end of the house.  Or, you can run a really long extension cord.
This will tell you if it's the whole house or just that breaker.  If it's your house you would take a different route than if it's just one circuit.
The Nordost is way better than the thingee (way more expensive too) but neither can clean up a totally bad electrical feed.
No more advice from me until I know more about the rest of the home.

elevick
2,636 posts
 
Dirty power can stink.  PS Audio regenerator?

BTW:  I have a whole house surge due to several hits on the poles and the transformer for the block is in front of my house.  Last time the main surge blew, so did my ps audio quintet.  The whole house is pretty hefty and kept the bulk of the lighting out but not enough to save the ps audio.  It was well worth frying the ps audio to save my system.
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