Ground Cheater plug or....

Someone clearly needs to produce an "audiophile" cheater plug for 50 bucks or so :-)

Here's another option & one I use myself on my CDP. Buy a Volex cord which is very good for around $7 from Newark & cut the grounding pin off w/some stout wire cutters. I do prefer to have my amp grounded. PS Audio & TG Audio sell ungrounded cords I believe.

On some PS Audio power cords you can remove the grounding pin.

Grimace, you can get hum in many ways.

Sometimes it is because the system components are plugged into different breakers.
My JL Audio subs will hum because they are plugged into a different dedicated circuit and they are on the opposite side of the breaker box than the rest of the system. But once the rest of the system is wired up and powered on the hum goes away completely.

But many times it is caused by cable TV connections.
Be it interconnects, power cables etc. You can buy isolation adapters that connect to the cable coax that will eliminate that hum.

With all that being said, and if all else fails, hum can drive me absolutely crazy. If it could be determined which component is causing the hum, then I would disconnect the ground in the outlet that component is plugged into.

I've been through all the components. The hum remains even if the ICs are disconnected from the amp. There are a lot of items in that room though: lamps, TV, ROKU box, DVD players, two seperate power supplies. The only thing I haven't tried is taking the amp to a different room/circuit breaker, mostly because I'm too lazy to haul the entire system along to test it.

RDav... you shouldn't assume that because someone is using aftermarket cables that they foolishly dropped a mortgage payment on them. There's nothing "uber" about my PCs, but at about $100 bucks they were an audible improvement over stock cords. Sorry if your hearing isn't that good. Maybe you should take up knitting.