I actually found an old cheater plug laying around the house. Works great, no more hum. The instruction manual for my Hsu vtf-2 actually recommends this. Mike
My subwoofer makes a low but annoying hum. I can stop the problem by disconnecting the cable to the satellite box, but then I can't watch movies. I read about using a cheater plug but some people posted that it is dangerous. I tried connecting a 75-300 ohm convertor with a 300-75 ohm...