I just picked up an SW12 today that has a humming noise issue.
First I plugged it into a few outlets around the house and it would hum in every outlet. However, if I touched any one of the line level input jacks the humming would stop instantly and the sub would be dead silent. I remove my finger and the hum returned.
Next, I decide to hook up to the amplifier and speakers. I turn on the sub (and no other components) of course the hum is there. I touch one of the input jacks...thinking the hum would go away...wrong...still humming. After leaving it powered on and no other components turned on for about 5 min, the hum goes away on its own.
Looking for any ideas on how to fix the problem. Why would the hum go away when touching the line level jack with no high level connections. But after high level connections, touching the line level jack does, well "jack" the hum remains?
Any problems leaving the sub on 24/7?
Thanks guys for any help you can offer.
Gary