My wife has a kicker setup in her ford focus. I'm still not big on kicker, i think the brands a bit over priced. But for what was paid for her setup its worth it. She has a zx1500 on 1 D4 Kicker L7 square firing out of her trunk. She competed with it and did a 142.8db @ headrest, 143.7db @ dash, 144.6 @ floor (kick), 120.4db outside (6ft from car) & a 149.8db @ port entry. Keep in mind these are averages not burps. She officially burped a 144db @ headrest. Shes not a serious competitor or none but thats pretty good for a daily driver on a stock alt and stock batt (only 1 batt underhood). I like the L7 but it seems to get hot and smell after harldy anytime of playing. The amps not clipping or none but still a decent sub.

I love these subs I have two hooked up to a 5000 watt RE audio digital amp. Then I have the Re audio XT800 4 channel on mids, highs and tweeters. These are amazing subs I have to say the box was a pain in the butt, it was done in 3 peices cause of room issues but in all they are in a 7 cubic ft box/sealed.