Ok - i agree with most of that - for most people class D fine and has efficiency advantages when running in a car enviroment, but look at the spec/ quality of the focals - i think that car owners wantling to turn their cars into a high fidelity/ quality enviroment would benifit from the (even slight) quality edge that a class AB amp has over a classD - in my experience a classD amp can get a bit harsh/ gritty at the top end when driven hard at high volume levels, and many musicians, sound engineers, hi-fi enthusiasts etc would hear the difference, i realize manufacturers' are continuing to develop classD designs to bridge the gap to class AB - but for me, class AB has the edge in quality
The difference may be small, and the difference between different speakers (sound quality wise) is probably bigger but with class AB amps available for less than a classD, its a no-brainer (for front speakers at these power levels) for subs or very high power (eg competition) systems,(power/ efficiency over quality) classD may be the way to go
- people debate class D vs class AB -
You have good arguments - I do not disagree.
Thinking only money and SQ - Class AB would be preferable.
But in a car with stock electrical system - Class AB delivering 40% of its power consumption in to the heatsink. Voltage drop could compromise sound quality. For me this is a bigger concern - than the difference in SQ between Class AB and Class D. I can not hear the difference - not at home - and probably not in the car.
But maybe, as you wrote - using Class D for sub and Class AB for the front set - is the best choice - a good comprimise of cost, voltage drop and SQ?