Toroidal transformer hum


Please help.

I have a BAT VK-6200 and I can hear a very disturbing hum coming from the amp. It gets so loud at night that I can hear it from 13 feet.
There is no sound coming from the speakers so therefore I ruled out a ground loop problem.

Please advise.
felitopaz
I had the same problem with my Quicksilver amps.
When I called them they told me if I have them on a shelf to put a carpet under amps and that did fix the problem. It was a vibration causing the hum. Give that a try if it works then you can get something better like a set of isoblocks [cork block] and put them under the feet of your amps!
There is no way that one should be able to here a transformer from 13' away, especially a toroid. Yogiboy may be correct about the shelf agrivating it, but I would assume that the previous posts about DC are along the lines. If you can borrow an isolation transformer, that would be my first thought.
Problem Solved. The culprit was the Christmas tree lights.
Thanks to all of you.

Happy New Year!