Hello,

I've had an Outlaw 7700 for about a year. I'm using a Denon 4306 as my pre/pro and it lacks differential (balanced) outputs. So I'm stuck using single ended (RCA). I've been fighting with a ground loop and associated hum for the entire time I've owned this amp.

My ground loop mostly goes through my TVs grounded power cord, over an HDMI cable to my pre/pro, over the RCAs to my amp, and back to ground by the amps power cord.

I read somewhere about the Ebtech HumX device. It claims to break ground loops without interrupting the ground. You put it in the power outlet and then plug the power cord into it, just like a typical ground lifter/cheater but this device has some circuitry to leave the ground intact but block ground loop current. I'm not sure how this magic works.

So, I'm thinking about trying this on my 7700's power plug. Is this a good idea or a bad one? Anyone have any experience with doing this? What are the advantages and disadvantages of this approach?

Thanks!
Dan