Actually, i just got my L7 15's hooked up yesterday.
I got the 2006 models, and they're hooked up to my hifonics bxi2006d, which sadly hardly moves them //content.invisioncic.com/y282845/emoticons/frown.gif.a3531fa0534503350665a1e957861287.gif
But what i WILL say, is that these subs SOUND great! I was expecting a big disappointment from all the complaints i read here about SQ, especially when moving from 2 12" type-x's to a set of 15's, but these subs honestly sound **** good, not just for 15's, not just for l7's, for anything.
Only complaint i've got is these 06's are way way underrated as far as power handling, cause the pair of 15's aren't 1/2 what my single 2002 l7 was as far as output, and i was driving it with a BOSS amplifier......
SQ's definitely much much much improved, tho.