Speaker Asylum

Hum from sub

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I have a Denon AVR 2513, sub out through coax to a sub across the room.

The sub has started to produce a hum. No breaks in wires. I made a heavier duty power cord with heavy duty plug.

Switching power off and waiting a time or overnight will cure it, and then it comes back without warning, even when we are just watching TV.

Room has rheostat controlled recessed lighting. Usual stuff.

Where/how do I start to look for the source of hum?

Follow Ups:

RE: Hum from sub - bullethead 18:27:37 05/19/17 (0)