Originally Posted by jr2012uga
class d amps are just like a/b most of them produce the same frenquencies as a/b amps.
Frequencies wernt the concern here, and iv never seen a monoblock amplifier that goes into frequencies above 250hz anyway...nevertheless power efficiency was the related concern, as for power being free in a car, true.. but the thing to remember is you are limited to the amount of amperage your charging system can put out, if your using a class a/b amplifier for whatever application just know that style of power supply switching is normally at best 50% efficient, which is why you always see in gigantic product packaging 1000WATTS!!! followed by a size 8 font of 500wrms, also a multi channel amp being used for subwoofers is putting more strain on the amp in turn causing more heat due to a heavier load, and being a class a/b will turn itself off to protect from overheating much more easily then a class d style amplifier, im sure most everyone has seen that before.
so without turning this into a flamewar or an army of misdirection just a good tip and relative way to think about it class a/b 50% efficient and class d 80% efficient at best, at least for the majority of the products we have or can afford.