Wharfedale 10inch cude subwoofer that has a feedback hum when con

Jul 26, 2009

- Hi vandergoot,

It really does sound like an earth loop issue, especially if its doing the same on another amp.

If you not happy about disconnecting the earth, the try leaving the earth free on the input cable. Test it by putting a pin/clip or something to the centre ring of the input and only touching the tip of the rca plug. That way the earth is off. If it sounds much better, then it is an earth problem, you may not have a choice but to disconnect the main earth from plug

The other possibility is that the earth on the sub is not connected correctly. Try earthing the outside ring of the RCA while its all plugged in to any metal screw etc just with a short piece of wire.

Not ideal ways either way but might get lucky. If it doesnt help, will have to go in. Probably not to serious (broken track/loop) so should be fine but get a quote first!

Best of luck