sorry if this has been asked, but im having problems searching. i read a book that said all rooms have two electric lines so you can avoid having lights, appliances, etc on the same line as your audio equipment. i checked the diagram on the fuse breaker in my house and all rooms seem to be one line, and so my amps are buzzing bad. so in a nutshell, im looking for a solution. how effective are the hum eliminators? and what about EQing? i know its unprofessional and about the problems associated with it, but i was wondering if there are any techniques to minimize the negative effects. specifically, is there a good way to use a tuner to measure the frequency of the hum so you can know exactly what frequency to knock off without it coming back when people play it through different speakers? ideally, i would like to figure out a way to get my lights off my audio, but im guessing thatd be a major project. thanks.