in my opinion, mine would only do about 130, in a dual ported 38 hz box in an olds alero, with 800rms amp. I think they suckeddd really bad on sq, and they werent that loud with an spl setup, so i sold them.
Steven i strongly think that u must of not had everything right. Mine are really loud with pretty good sq. I tuned both boxes to 32hz and damn the lowz play really loud and with good sq. If i play late nite tip, i can be heard from quite a wayz.