Alright, I need to go 4-way active with 2 sets bandpassed... I thought my only option was to run a crossover, I didn't realize the SX Kicker amps are bandpassable on every channel? So I can run 2 SX900.4 with the remote instead?!?! Please help! Thank you! Jordan Crossovers 10Hz – 16kHz variable HP frequency adjustable in 1/12th octave steps 30Hz – 20kHz variable LP frequency adjustable in 1/12th octave steps 6 – 36dB/octave variable crossover slopes (up to 48dB/octave on the 650.1) HP, BP, and LP on every channel http://www.diymobileaudio.com/forum...ng-active-setup-using-kicker-sx-amps-dsp.html