Hello All. I can not decide between a 2000 Watt Crown amp and a 4000 watt Behringer amp. The Crown has 1/2 the power but has a crossover to send the lows to the passive subs. The Behringer does have a crossover but only for one channel. My Onkyo Receiver does send (thru Sub out) the lows only and even has a x-over cut of 80HZ or so. The problem is that they do not mention a slope and th Crown has a great 48db slope. Please, need expert opinion. I know lots of car audio equipment but this in new for me.