The Lutrons are worth a try as is using a different circuit if you can. None of those worked for me, but shielded interconnects between the preamp and amp completely eliminated the hum for me. Now, it's not easy to find shielded interconnects that aren't a little muffled, but it was the only thing that worked for me, and I did find one that I like.
Amp "Hum" caused by dimmer switches
I just recently got an Acurus 100x3 amp to drive the front 3 speakers of my home theater system and I am disapointed to find out that my room light dimmer switch is causing a very noticeable "hum" that can be heard from the listening position when no audio signal/ low passages are present. I did not have this problem using the amp in my harmon/kardon receiver. I do not want to remove the dimmer and go to an on/off switch and do not have the money for a power conditioner. Am I out of luck and have to resell the amp? I bought it used from this sight so I can not return it. The amp sounds very nice when the lights are not in use. I'd love to get some sound advice! Thanks!