Never mind my excellent video skills UltraHovercraft. (Click to show)
Looks gorgeous doesn't it. You should hear it!!
I have seen this amp in person!
I hear a Geiger counter in the background.
And a clock.
And heavy breathing. ;)
New video online C.
Is the buzzing clear? Was much better on the original MOV file
Field Recordings... excellent strategy.
Have you learned if there is any change in this sound being produced by changing any combination of feet and the surfaces your amp sits on? Sometimes, when elimination is not possible, minimizing becomes a satisfying and reachable goal.
You may have settled on the perfect placement. But for experimental purposes, try moving the amp onto different surfaces. Why go to the Spa or the Gym? When you could move/pump iron right from the listening room... ask Clayton SF!
Ultra-, my 300B Glenn Amp mono blocks have a mechanical hum like yours. I've heard yours and it sounds just like mine. Same intensity, etc. I have placed my mono blocks on thick rubber discs (usually reserved for wine glasses) and the sound did not change. Cork didn't help either. I have also lifted the amp off its feet and held it suspended for a few seconds (it is heavy) and the sound didn't change either. I even placed spacers under just the front two feet thereby lifting the front of the chassis at an angle of 1-inch higher than the back--no change either.
Why don't you try putting cork or rubber coasters under your amp to to try it out? Your room is smaller which amplifies the mechanical hum. Mine gets drowned out by the traffic going past my apartment on Pine Street. ;)
Rob, are the dimmers are different circuits than your equipment and still causing noise?
Someone needs to make audiophile dimmers. Personally, I hate them. But, my wife is always using them since she doesn't like a lot of light. In my big room I keep the dimmers off.
Amazingly, yes. I have a dedicated 20A "home run" to my panel for the hifi - and it still happens. That dimmer somehow pollutes every circuit in the house.
There are audiophile or what I would call studio quality dimmers but they are not cheap. Here is a link to the Luxtrol brand which is used in some professional recording studios.
That is one of their cheaper models. You may find one cheaper on Ebay. They will not fit in a standard wall outlet box. These are variacs designed to put in the wall not the SCR type that chops off the AC waveform that you can buy at Home Depot. There are some SCR types with a lot of control circuitry that might work but I have not investigate them. Each time someone mention noise issues with dimmers it bring up bad memories I had with the dimmers in the past. Other methods like using track lights with switchable banks may work in some setups.