If the dimmer is the problem, you should remove the dimmer, no line conditioning treatment is as good as removing the source of the problem altogether. Try getting a few lamps for the room to give you different levels of total lighting in the room. If you guys really want to hear how bad dimmers are for your system, turn a clock radio to an AM station and then turn your dimmer up and down. If you really must have a dimmer, get one of the stepped dimmers, as a fixed resistor does less damage than a variable resistor, but still damage. For the record, I have no dimmers in my entire house, one dragged out argument with my wife, and years of improved listening as a result, well worth it.
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!