How much overlap is there? I run a 1x15 (8ohm) and 1 2x10 (8ohm) powered by a Peavey power amp for 450 watts/cabinet. They're both full range cabs but I thought I might experiment with biamping and biasing the 15 cab lower and the 2x10 higher. Knowing how far the slope goes on either side of the crossover freq would help me determine where best to set the crossover point.