James, to answer you question about "power enhancement", what I mean was that some companies will actually incorporate some kind of separate transformer meant to be connected in conjunction with power amps i.e High current outlet banks. These high current output banks are used to supply more current to the amplifier to make up for the increased resistance, due to the other components utilizing the power source and also to supply additional power to the amp when call upon to reproduce dynamic bursts of power with movie scores.