theres alot of people here reccomending an 810, now those replicate fantastic lows, however they are back breakingly heavy and inconvienient to move around. i would suggest a sympol 410, which is what i use. i soon hope to get a 210 to put it at ear leval for rehersal and gigs. i run a recently bought carvin BRX 10.4 NEO through an older carvin r600 series II head. im getting around 128 db from this 410 alone, with the 600 watts going into it, the cab is 1200 watt handleing. so if it was powered with something more you could only get higher on the decible scale (whith every doubleing of power, around three decibles are added on) ampeg heads have a fantastic tone but their cabs are a waste, the carvin 410 i have runs around 560$ so its cheeper than the average cabinet of that quality. carvin uses custom made eminence speakers, so they are better than any "not so great" celestion speaker most other companys use. oh and by the way, the carvin 410 replicates the low b without any problems.