they get loud as all f u ck but i think with a lower tune box i would move more air and get alittle more flexing im in to that shit. the subs are still stiff as hell so i would like to get them in to a box that would be lower tune and then i can get them to losen up a bit in the right box. i have the sub sonic set on my amp at 35 hz. im looking in to hiting some of the lower notes. thanks guys