Do you have an update on this issue?

I just got my new Audiobytes this week and have the same "hum" coming from my sub. I isolated the audiobyte system, plugged directly into 3 different wall outlets and a power scrubber from home theater setup. Still get a hum no matter where I plug the unit in. I've contacted Axiom and I'm waiting to hear back. I'm interested if your new driver got rid of your problem?