Velodyne CHT-8 Subwoofer Logo
Posted on Nov 12, 2009
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Sub has started humming with amp turned off. just turned on at wall switch.nothing running

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  • malanna Nov 24, 2009

    Hi fredjones thanks for your assistance, have tried moving sub to different power outlet,disconected all leads from amp and only had it plugged into wall socket and turned it on, after 1 hour it started emmiting noise again, sounds like white noise without any hum at all from the back.sorry to take so long to reply i work shift work.even turning it off with the remote does'nt stop the noise, the only way is to turn off at wall socket?

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  • Posted on Nov 21, 2009
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If the hum is from the back of the unit around the amplifier, it may be the transformer. It could be that the mounting is loose.
It could also be that the transformer is going out.

Disconnect all the inputs to the unit, Still hum?

If the hum stops you have something causing noise to the input.

If you have it on a switched circuit, try moving the power plug to a different outlet that is not on a switch. If hum stops, then you have something on that circuit causing the problem

if all inputs are disconnected and it still humms good chance it is the transformer.

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