We do it all the time at work, NOT at 1 ohm though, building may burn down with that kind of current running. If you tune the box lower you can get more xmax out of the woofers, moving more air makes for higher dbs. Too much xmax and the woofer wil bottom for sure with that kind of voltage.
This doesnt work everytime, my box was tuned to 26 and was loudest at 55hz, you'd also have to figure in the response of the car or home for that matter
