>Yep US amps are hella sweet, but unless you have a awsome
>electrical system, you won't see the power from those amps.
>Us amsp have unregulated power suplies, which means their
>power output is related to the voltage and current input.
>Theese amps are the way to go if you have several or a high
>output alternator and several deep cycle batteries to go
>with. A typical class D amp can draw as much a 2 times less
>the current of an unregulated ab amp, with similar power
>output, and similar voltage and current imput. Us amp are
>the way to go if you have the cash needed to make them work
>up to their potential..eg..killer electrical system..US amp
>have excellent specs on their equipment, but without the
>proper electrical setup in your car, they would be a waste
>of money IMO. Those are great cheater amps too if you like
>to compete sice they are way underated. A simple trick of
>upping your voltage to 16-18 volts will give awsome results,
>but at some expense of the needed equipment to do so. The
>best bang for the buck will always be the class D amps,
>because of their efficiency, and cost, output power, and
>input voltage and current they require...

I agree with him I had to pay $615.00 for a custom built 200 amp Ohio Generator alternator other then that I have 1 Optima yellow top thats it, no caps, or all that other BS.. If your wanting a top of the line high quality system than go with my scenario if not go with what he said above. Although they do make high end class D amps US Amps make soem which is there bass mekanik line and MMATS. Those are I think the 2 top class Ds. Actually the US Amps that im speaking about above are class T digital amplifiers.