MB Quart with dual x-overs
 

Attachment 26530Attachment 26531I recently purchased an MB Quart ZA2-1000.4.... It has two x-overs one for channels 1&2 and one for channels 3&4. It is also bridgeable. My question is can i use the lowpass x-over for channels 1&2 and bridge them, to run a 12 inch sub. Then use the highpass x-over for channels 3&4 and leave them unbridged to run two 6x9'S. Or do they all need to be Bridged.. Or all need to be unbridged. Thx in advance for any help.. Attached is photos....

I am a complete noob and was wanting to know if anyone can tell me how i should adjust my amp I am running MB Quart ZA2-1000.4 it will be running 125 watts x 2 RMS @ 4 OHMS into two pioneer TS-A6974R 6 X 9's rated at 160 RMS... and 500 watts x 1 RMS @ 4 OHMS into a Kenwood KFC-W3016PS 12 inch sub rated at 400 RMS in a 2 cubic foot ported enclosure tuned to 28 Hz. It has the following adjustments dual crossovers one for channels 1&2 and one for channels 3&4 Low Pass Filter (range 30Hz-250Hz) High pass filter (range 60Hz-1.2KHz) Bass EQ (range 0dB-9dB) and Level(range 6v-0.2v) ive been told my LPF should be around 80 Hz as well as my HPF also around 80 not sure what the Bass EQ is probably "Bass Boost"?? And not sure about Level probably "GAIN"..... Any help any opinions would be appreciated. THX in advance>