monoblocks don use up a lot of power from ur batt but can produce high power.. the bass will b more powerful and u can hear that ur woofer is reacts faster than b4 (if ur current setup is not the max for the woofer)

*class D's monoblocks are not as accurate as class AB's monoblocks..

IMHO, monoblock class D amp no control n not clean, cannot said that monoblock is much more powerful than stereo amp. It determine by rms.

elec xover, not split signal from hu to amp, it is to cut frequency points that u intended to send from xover to amps. Ur hu sending signal (depends on manufacturer's specs) eg, full range out. U need to send some correct frequencies to ur tweets, mids n woofer.