I have a Peavey 500BH, 210 watt 2-10" powered cab. It is supposed to be bi-amped for bass with a recomended crossover of 250hz to 500hz. My question: does this unit only handle frequencies above this range because of the speakers, or because of the amplifier. Would full range speakers allow it to handle bass by itself, or is it destined to be what it is because of electronics. The specs on it say the frequency response is 20hz to 20khz @200 watts into 4 ohms. I am looking at Blue Marvel® Pro 1056-8 Ohm Bass Speaker on the peavey web site and it says; Usable frequency range: 40 Hz ~ 4 kHz. From what I can gather, the Scorpian speakers that are in it have a range of 80 hz to 4 khz. It appears the cabinet has the range to handle down to 40 hz, but doesn't have the speakers to do it. Would that additional 40 hz offer much improvement to the low end of a 4 string?