I have two 8ohm cabinets (1x10 rated 300W and 1x15 rated 200W) two different preamps (SansAmp RBI and BBE BMax SS) and a conventional two channel power amp (Samson Servo 550 215w/ch @ 8ohm, 300w/ch @ 4ohm, or bridged 550w/ch @ 8ohm - NOT bridgable into 4ohm) and an active US Fender Jazz-4. Which method is the best-performing and cleanest/safest way to get the most tone and volume out of the combination for an outdoor gig? There will be a house PA for my use, if needed. 1. Use a splitter from radio shack to divide the preamp signal into two seperate signals, one for each side of the power amp which will drive each cabinet seperately? 2. Use the DI out of the SansAmp RBI into an XLR-1/4" adapter into one side of the power amp into one cab, and use the 1/4" output of the SansAmp RBI into the other side of the power amp for the other cab and have a true bi-amp rig, with seperate level controls for each channel on the SansAmp as well as the power amp? 3. Use the DI out of the BBE BMax into an XLR-1/4" adapter into one side of the power amp and the 1/4" main output of the BBE BMAx into the other side of the power amp for the other cab and have a true bi-amp rig, with seperate level controls for each channel on the power amp only? 4. Use a Radio Shack splitter to divide my Bass Guitar signal into the two different preamps and run each into a seperate channel of the power amp to the seperate cabs to have two distinctly different preamp signals? 5. Should I look for a power amp with a better configuration or capability for the overall application so I can daisy chain the cabinets down to 4ohm - Particularly if I have to reserve one of the XLR's for going to the snake?