Amp hums in standby mode when TV is on


Hi, my Sherbourn 5/1500A power amp starts humming whenever the TV in the same room is operating. This occurs even when the amp is in its standby state, and also happens when using the amp(although you can't typically hear the humming at that point because of the sound from the speakers). What's more, as the image on the TV varies in brightness, the intensity of the humming/buzzing also varies. If the TV is off, the amp is dead quiet. I am assuming this is some kind of ground loop problem.

Should I try to plug the amp in with a "cheater plug"? There is a sticker on the back of the amp that indicates that the amp must be used with a grounded power cord.
mtrot

Showing 2 responses by mtrot

Thanks! Yes, I do have cable TV service. Also, this amp hummed in the same manner when it was previously used in another room in the house. There is also a cable outlet in that room.
Thanks, yes it is a mechanical buzzing, very loud at times.

It is my understanding that the power standby feature on this amp is designed such that when it receives a signal and switches on, it is supposed to be somewhat in a "warmed up" and stable status for good sound.

I will also see if adjusting the speaker and/or interconnect cables has any effect, which I doubt.