i know they are 4x10's in the rear pillars i had recently purchased kicker 4x10's and i totally forgot about the watts and they can't be amped. i am now looking at the pioneer 4x10's. are they any good. they are rated 120 watt max. my amp is 75. how can i amp these if i already have two crossovers hooked up to my amp??? the amp is the 300/4 jl audio. someone please help????