I have a Carvin Pro Bass 150 (read 150 watts) that I bought off of a buddy of mine. It has a 10" driver, effects pedal (worthless for the most part) and a vinyl cover and I paid $200 U.S (it's in new shape).. I can't figure out why they stopped making the PB 150 like mine and started making the PB 100. Guess they wanted to keep costs down??? I could probably do well and buy a single 15" Carvin cabinate to sit along side of my PB150 and drive that. Would that work or would I overload the amp too much by driving the 10" and the 15" at the same time(pardon my ignorance, I'm a noobie)? Thanks!!!