Home Speaker Asylum

General speaker questions for audio and home theater.

Hum from sub

I have a Denon AVR 2313, 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?

Edits: 05/19/17

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Topic - Hum from sub - docw 14:16:44 05/19/17 (4)


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