Opinions on Subwoofers?

[72GMC2500]

i have a pair of Alpine S types in the kickpanels run by an Alpine CDE-9852 head unit and my buddy has a 12" pioneer shallow mount subwoofer in his 79 chevy and i think it should fit under a bench seat with the right box. That subwoofer pounds really good, even with just the one and a fairly cheap MTX amp you can hear it from blocks away, and those pioneers arent all that expensive i'd suggest you check it out they also come in 10's. http://www.crutchfield.com/S-kmfKOkO...0&I=130TSS3041