I want to go with the pre/power amp setup and picked out my stuff. I'm going with the Bmax and QSC RMX1450. After lots of looking around I haven't really seen anything bad said about either of those units and the output per dollar looks like a great deal. I'm also using an Avatar B115H with a 210 cab using the Kappa Pro's rated at 500W each. So now it looks as though I have my power requirements covered indefinately and the cabs to handle it. I swear I don't want to have to EVER crank it to 10 again wishing I had just a bit more. I don't really play that loud but I love to have headroom. Should be a good sounding unit too I think. I hope!! To hook up the preamp to the power amp, Can I just use 1/4" jack (typical instrument or speaker cable) cable from the Bmax main out to the QSC in? I know they will connect, but is everything ok as far as voltage level, impedance, balanced/unbalanced or whatever else may apply? And to hook the cabs up- I have a speakon connector on the B115H but not on the 210 cab. Can I use a speakon cable to the 15" cab and a regular speaker cable from the 15" to the 210 (both 8 ohm cabs) to get everything connected and properly operating at 4 ohms?