Nice install man, but you're 15" L7'd are only getting 800 watts each?? More power dude. You could hit the 155 db mark. Although since I pulled my system out of my contour (after my last one I swore I'd never own another car stereo with any real power due to the rattles I got. And I only had 2000 watts!), I can't comment on how good the soundstage is within the vehicle. My corolla which had my 1 kilowatt system in it, seemed to almost suck up the bass.
