Axiom Home Page Forums General Discussion Technical Questions EP600

Randy, from what you've described it appears that the front subs and the satellite aren't grounded at the same spot, and that's forming a loop. Using cheater plugs on one or both of the front subs would be a quick fix until the trouble with the satellite was hopefully corrected by them. The sub amp chassis would be ungrounded if the screw was removed. The screw would connect the chassis to the shield of the sub cable and provide a somewhat effective chassis ground through that route.

Make sure the grounding screws that Direct TV put on are really tight.

I will check the work outside tomorrow..All my audio equipment is plugged into a decent Tripplite Surge unit on the same circuit that feeds the theater room as the subs are plugged into, not the same exact outlet. From what I've read you can have two pieces of equipment with 3 prong (grounded) outlets on the same circuit, but the loop forms when you connect those two with another cable, which is also acting as a ground.

The HD receiver only has a two prong plug, so not sure if that is part of the problem. I need to play with some things but as soon as I unplug the HDMI cable to my receiver, the noise goes away, or if I unplug my front subs from the receiver.

I thought of your divorce as soon as I started tying that .

Hey, Cam! The Bunny Ranch is still months away. Don't hurt yourself in eager anticipation.

Randy,
I had ground loop hum issues and the only thing that would fix it was running a wire between chasis of receiver, ground screw on sub, chasis screws on any/all other equipment. This wire just needs to be small 18 guage. I guess this equilized all grounds. All I know is it made my system dead silent and did not hurt bass output. I had made up some test wires with gator clips to find problem. All of this equipment was powered from same circuit through a surge protector.

LOL!

Not sure how I would do that with the 350s, first they don't have a ground screw, and they are in the actual theater room. The rest of the equipment is in the AV closet.

This is how I 'solved' my subs' hum problem. It all eminates from my Cable TV connection - disconnect it from my system & it disappears; however, of course I can't operate that way.

http://www.axiomaudio.com/boards/ubbthre...true#Post357488

I still have to wiggle the surge protector power bar plug in the wall socket to make sure that the ground contact is perfect to eliminate the hum completely. Ground loops are very finicky....

Tom
Comox, BC

for me this is not just my sub, it is my entire system, but I'm sure related. hope to try a little troubleshooting tonight.