Hello Could someone explain to me how Amplifier Power Transformers work? I´m confused from reading some posts on here as it appears that some amps/receivers output one set of figures but only consume a smaller amount of power. e.g an amp outputs 5 x 100 watts into 8 ohms but only consumes 400 watts of electricity. I assumed rightly or wrongly that power transformers transformed the electric current to give more power when needed. Some people say that an amp cannot output a certain wattage if it doesn´t consume that much in the first place. Very confused by the whole thing to be honest so if someone could put me right. Many thanks.