Manual service sunfire mk II

eBay...


Price = variable $256 and up, final cost up to the skilled bidder.

http://desc.shop.ebay.com/i.html?_nkw=Sunfire+True+Subwoofer&_sacat=0&_odkw=Sunfire+True+Sub+MK+II+Subwoofer&_osacat=0&_trksid=p3286.c0.m270.l1313&LH_TitleDesc=1

sounds like a grounding issue........Verify grounded properly

guy gevais

hello, the reason for the this is because theres a dead short in the unit someware i'd check the diodes first with a multimeter then the transistors then the resistors then the capacitors

regards
shaun

you have a ground loop issue you could purchase a ground loop isolator, jensen makes them for about 40 bucks.I have discovered that if you have cable tv, unplug the incoming cable in your cable box and see if hum disappears.

Check your cabling to make sure you dont have a ground fault. if you still have humming, buy a "groundless" adapter for your power plug (takes the ground away) and plug it back into the power outlet and I bet your humming will be gone

hello the reason for that is there's a dead short somewhere it could be a transistors also check the diodes as well but make sure the power's off
good luck

shaun

http://www.parts-express.com/pe/pshowdetl.cfm?&DID=7&Partnumber=297-460&ctab=2#Tabs

I had this issue a few years ago and the power cable from one of the inner terminals had come loose. It was still touching but whenever the sub would really pound it would jump off the connection and then reconnect causing it to hum. It was the most annoying thing ever so I finally pulled off the amp plate (super easy) and you could clearly see the loose wire. I had to use a good soldering iron to put it back on since it's a pretty fat wire. If you're not under warranty anymore then pop the back off and see if that's the issue.

-Dylan

you must change light switch now with a new one-and grounding is very very important.