If you don't have a 20 Amp dedicated power line then the 2Q is not doing anything a 1.5Q would not do. Also, most complete stereo systems don't come close to drawing 15 Amps from the wall. My front end draws 2.0 Amps and my amps (Pass X600) draw 10 amps. I have a 2Q on the amps and have monster on the front end. Want to upgrade to Q650 for my front end. Everyone is correct. You don't have to strain to hear a difference when you plug everything into a 2Q. It is obvious (even my wife immediately said WOW!).
