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Can you diagnose a possible ground loop problem with one of those little 3 prong wall plug electrical testers that you plug into the wall and has the 3 lights across the top? I'm working on a sub woofer hum issue.

I have to go a long way to get to my rear speakers. Especially if I want to route it in the least conspicuous way. 50 feet to one and maybe 65 to the other. Does this distance impact the type of cable I should use? Thicker gauge perhaps? I do have some 16 gauge. Is that too small?

New Cable I'm almost ready to let things be. Blue Jeans Cable was fast and the cable was much more substantial than I thought a $38 would be. I also learned that plugging the power cord for the sub into the same surge protector as the aquarium caused some hum. I've plugged the sub...

Hum Free at Last! God bless the BJC LC-1!! It eliminated all the hum I was upset with. I can still hear the sub working, but I have to get right down on it. 90% of the hum disappeared. Thanks to those that helped.

The cheater plug didn't fix it. I'll try the new cable and if that doesn't work, I'm planning to try one of the "ground loop" gadgets.

After Troubleshooting I've taken everything out of the loop one at a time. Plugged the sub into the same wall socket as the preamp. The hum is the same. I unplugged the rca cable from the preamp and when I put my finger near the cable lead, I could manipulate the hum. I'm thinking its...

I have a ML Descent run by a Carver Surround Preamp. The sub is 25 feet from the preamp and is humming badly. I have the cheapest possible cable and know that has to be some of the issue. When I disconnect the cable, the sub quits humming. I can't shorten the cable because of how the room...