Does the Ebtech hum eliminator come in a 20 amp version? If so I cant find it. thanks

Not that I could tell from a quick Google search.

Where/under what circumstances are you experiencing hum?

Reason I ask is I had a devil of a problem with that a few months ago. Turns out the CATV line coming into my home had the ground cut at some point and was the culprit. Until that was resolved, I was able to recify the problem by using cheater plugs on the amps or, later, by using a Mondial M.A.G.I.C. CATV ground isolator on the cable (once I got the cable fixed, I returned the Mondial).

Although the Ebtech says it will not affect the signal, I, personally, would want to avoid putting such a device in the signal path unless I absolutely had to. You'll also need to add another set of interconnects.

I just realized I jumped the gun with a response based on an assumption you're having a gound problem in a home theater system. From seeing where the Ebtech is normally used, that may not be the case.

Is this for a guitar or mixer?