I've read many posts regarding this topic. It seems many prefer to hook up their system to a dedicated 20amp circuit to meet their system's demands. Looking at my system, I became concerned that my 15 amp circuit wasn't sufficient. My system contains a Pre/Proc, three high current 2 channel amps (two Hafler DH200's, one Parasound HCA75) powering 5 speakers of average efficiency, a Yamaha DSP-1 sound processor, one DVD player, one CD player, one VCR, one MD player, 40" 16x9 rear projection HD ready TV, SVS 16-46PC+ powered sub. ( I think I mentioned everything). Total room volume is approx 5500 cubic feet (room has high ceiling). All these components are powered through a single 15 amp outlet. I decided to see how much current my setup draws under real world conditions. After all, it's extremely unlikely that all my components would be drawing maximum power at the same time. Armed with a amp meter, I put in on the hot lead in the breaker box, turned on all my components, put in Lord Of the Rings, and cranked it up as loud as I could stand it (which was VERY loud! The battle scenes sounded spectacular!) The result? Maximum draw was only 4.7 amps. I was very surprised, and glad, that it was this low. Looks like in my situation, a 15 amp circuit is plenty. It would be interesting to know if those of you who installed 20amp circuits actually tested to see it was really needed. JimmyK PS - My applogies if this post is in the wrong section.