Why is it so many people give the pro audio subs a hard time? I ran 4 rockville 18" subs in a infinate baffle wall configuration in my last home theater speaker set up and was blown away by the performance of it only using one crown cdi1000. No low end filter. Movies like master and commander, the tom cruise one called something like world at war? And u-571 all took my breath away.... and played below anything i could hear bass notes wise (cone movement, but no sound) using only 2 crown cdi1000 amps. I have 4 polk psw 505 subs that never came close in room, 2 svs pb2000 subs that were close... but lacked the chest punch and no viseral body tactile feedback. \nJust to sum it up, (2) crowns@ pon shop prices @ $600 Canadian and (4) subs new @$400 all in, absolutely destroyed anything I've ever heard or felt. Going to build it again in the next build, along with outbound svs subs. Any thoughts?