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Loud Hum

I recently bought two Brystons 7Bst's to power my Revel Salons. I also have a Bryston 1.7 and I am getting a LOUD hum from ALL speakers (I run the center and rears with a Proceed HPA 3 while I purchase other 7BST's). The Proceed did not make the HUM while I was using it to power the two Salons and center channel, but now that I am using it to power the center and surrounds it is VERY loud. My Revel B 15 ALSO has the HUM (although not so loud).

Any suggtestions?

Thank you!
dynasys
rsbeck
887 posts
 
I had a similar problem. I solved it by installing dedicated 20 amp circuits.
You've got a lot of amplifiers drawing juice and when they don't get the juice they want, the transformer hums. Not exactly sure why -- I'm a layman when it comes to the technical side and I cannot recall the explanation I was given.
Everything in my system with a transformer, amplifiers, sub-woofer, and even
AC Conditioner was humming. But, when I installed the dedicated 20 amp circuits, all humming stopped. System is quiet as a stone.
lacee
811 posts
 
I once had a problem with hum. It was caused by Halogen lite bulbs. I asked a few of my knowlegable friends how to get rid of the hum but nothing worked.Since it only buzzed when the lites were on, I thought why not go to regular bulbs. Presto, no more hum. My friends were impressed.
Do you have any halogens in the room or nearby?
lacee
811 posts
 
Try putting the proceed on the same dedicated line as the Brystons. You may have a problem where the lines at the panel are not on the same phase . If the line now running power to the Brystons is on the right side of your panel and the line powering your Proceed is on the left, this could be the problem.Easy to fix yourself, just shut off the power coming into your panel and check that it is off.
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