I thinking about getting the carvin cyclops, I have a good deal on one of them. did anyone try it, and can tell me about this combo? the owner told me that I might have to change the speakers, I though maybe I can use the 18th sound 8", and eminence 15" that are in the fearful cabs. do you guys this it might be a good idea? plus could anyone answer a few questions: *what's the bi-amp thingy? *if the power amp delivers 600W in 4ohm, or 2ohm? *the overall ohm rating for all 3 speakers is 4ohm, or 2ohm? Thanks.