Hi everyone, I just found this place and it looks like I've got lots of reading to do. I've only been playing guitar for a few years, and just recently started to play bass, a Mexi P-Bass and J-Bass. I'm setting up a small sound reinforcement/music production company with some friends here on Vancouver Island and I'm acquiring toys...er tools to outfit it. I recently bought a couple of older Mesa Boogie RoadReady cabs to help fill up the studio. I have a 600 watt 4x10 RR cab with unlabeled speakers in it and a 1x18 cab with a 400 watt EV speaker. I'm waiting to hear back from someone about a Yamaha PB-1 preamp I want to purchase. My logic being that the built-in crossover would split the signal to two poweramps to feed the cabs. My question is: Do I really need to get amps specifically designed to feed bass cabs, or can I use good quality PA gear? Is there a fundemental difference in the way bass amps handle the lower frequencies? My plan is to plug the bass guitar into the PB-1, through a Yamaha GC2020B II compressor, then through a Yamaha Q2031A eq, and finally into a pair of Yamaha P2250 power amps bridged to 500 watts@8 ohms (am I a Yamaha slut, or what?). My other plan was to run the PB-1 into a pair of Yorkville BM400 amps, or a similar pair of affordable power amps. Since different players will be using the gear, I'd like to get something that can be configured to all sorts of playing styles. Any info you experts out there can fire my way would be most appreciated. Thanks.