The switches are less than a year old and I don't know how cheap they are I think they were the $20 ones or something. Anyways why is it you think the ceiling fan switch is still the problem? If the sub is off everything works just fine. I understand the sub is off and can't make a noise, but no kitchen appliances, lights, tv's, av receiver, or anything like that seem to be doing anything weird. Also for what it is worth the outlet the sub is plugged into is on a different breaker than the ceiling fans.