grounding & hum questions... (1 Viewer)

[Aris A]

I need some advice from all you tech savies out there. I have a Sherwood am9080 amp and I noticed a ground terminal at the back of it. Now do I still need to hook it up to a receptacle or the power cord ground is good enough?

I do have a sub which constantly hum...any suggestions?
Thanks.

Aris

 

[Wayne A. Pflughaupt]

Does the receiver have a phono input? That’s usually what ground terminals are for.

The hum from the sub (assuming it’s not somehow defective) is usually caused by a ground loop. Typical sources are a cable TV feed, a satellite dish that has the grounding block connected somewhere else besides the house electrical ground, and lighting dimmers.

Regards,
Wayne A. Pflughaupt

 

[Aris A]

Wayne,

The AM9080 is a power amp...sorry I forgot to specify. Any suggestions how to deal with the ground loop. thanks

Aris