Yep I know they are running off a samson 1000. The 500's are front firing, ported on the front, and have that dsp stuff so maybe they have more kick than the svs. They are on the low end of the list tho. I would rather the 600 or the svs ultra 13, or maybe one of those ED audio subs. I keep looking at the price of the ed a5-350. Only 600 bucks and has a 15" with roughly the same amount of power I have now to a 12....then I would have extra $ for a sm-1. Then there is the a7-600 that has dual 15's and 1300w. But that sucker is BIG....but not as big as the dual 18 one!