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2359glenn | studio - Page 340

post #5086 of 9513
Quote:
Originally Posted by Ultrainferno View Post
Never mind my excellent video skills :rolleyes:UltraHovercraft. (Click to show)

Looks gorgeous doesn't it. You should hear it!! :cool:

 

I have seen this amp in person!

I hear a Geiger counter in the background.

And a clock.

And heavy breathing. ;)

post #5087 of 9513
Quote:
Originally Posted by Clayton SF View Post
 

 

I have seen this amp in person!

1. I hear a Geiger counter in the background.

2. And a clock.

3. And heavy breathing. ;)

 

New video online C.

Is the buzzing clear? Was much better on the original MOV file :( 


Edited by Ultrainferno - 9/30/13 at 12:58pm
post #5088 of 9513
Thread Starter 
Quote:
Originally Posted by Ultrainferno View Post
 

 

New video online C.

Is the buzzing clear? Was much better on the original MOV file :( 

 

Field Recordings... excellent strategy.

post #5089 of 9513
Quote:
Originally Posted by Silent One View Post
 

 

Field Recordings... excellent strategy.

 

 

Nos let's just hope there's a cure! :cool:

post #5090 of 9513
Thread Starter 
Quote:
Originally Posted by Ultrainferno View Post
 

Nos let's just hope there's a cure! :cool:

 

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.

post #5091 of 9513

I still have to change the feet to try, but as I don't have any I'll need to buy them first

post #5092 of 9513
Thread Starter 

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... :D ask Clayton SF!

post #5093 of 9513
Quote:
Originally Posted by Ultrainferno View Post
I still have to change the feet to try, but as I don't have any I'll need to buy them first

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. ;)

post #5094 of 9513
A fairly significant number of my audio products will exhibit a mechanical buzzing from the power transformer when the dimmers in my kitchen are on. When they are not - no buzz. Even my Martin Logan sub does this. Not audible at all from the speakers, it's truly just mechanical. And turning the dimmers off solves the issue. It's obviously that the dimmers are polluting the AC in my house BADLY, even to an extent that line conditioners don't seem to block effectively.

So make sure your dimmers are off!
post #5095 of 9513
Quote:
Originally Posted by Skylab View Post

So make sure your dimmers are off!

 

Good suggestion. My dimmer is always on. And it is in the same room as my buzzing amps.

post #5096 of 9513

I don't have any dimmers :rolleyes:


Edited by Ultrainferno - 10/1/13 at 1:53pm
post #5097 of 9513

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.

post #5098 of 9513
Quote:
Originally Posted by dminches View Post
 

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.

post #5099 of 9513
Quote:
Originally Posted by dminches View Post
 

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.

 

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.

 

http://www.musson.com/luxtrol-wbd800-wall-box-dimmer.html

 

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.

post #5100 of 9513

You can also try some other form of damping, like increasing the transformer mass by putting a weight on top.

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