Ebtech's Hum X Ground Loop Exterm. Do they work?

I had a similar issue - some hum was presenting itself via my DAC, and it got louder as I increased volume. I was able to get rid of it by removing the ground pin of the DAC's power cable (just as an "advance test" as the above poster mentioned). I then picked up a HumX, replaced the ground pin on the power cord, and plugged that power cord into the HumX (and the HumX into the wall). Works beautifully.

Note that the HumX has a current limit of 2 amps (I think).

I have a couple of Ebtech Hum X's in some of my systems and I believe the older more squarish one has a current limit of 3 amps and the newer more rounder ones has 6 amp current limit.

Thanks for your responses. I think i will try one.

Hi Brian27b or anyone else who may be considering the Ebtech Hum X

I forgot to mention that I've had problems/difficulty connecting the larger straight blade or hospital grade type plugs into the Hum X. Ones from Sonarquest, Wattgate, and Marinco took quite a bit of force for me to connect them. There was one brand that I couldn't fit at all. I think it is the ground plug that is the hardest to get in there.