hmm, I definitely have to measure, I'd like to try out something bigger than 12"s. I'm guessing they get progressively more awesome as you increase size haha. Any amp suggestions as well? I'm not sure what kind of power these things can handle in a ported box, I was thinking maybe a sundown 2500d or 3000d or even a rf 30001bd. I really don't want to upgrade my 120 amp alt, would battery capacity be good enough to drive around with. This is a daily driver by the way, I'm not sure if I mentioned that before. Thanks for the suggestions thus far.