i have a splw-15 and the specs are>
Fs 29.0 hz
vas 1.6 Cu. ft.
Qms 4.37
Qes 0.352
Qts 0.326
Xmax 0.9"

now my question is what does all of this me especially the Xmax is that almost an inch both ways or .9 out and .9 in so the true Xmax would be almost 2 inches i am thinking about getting a profile ca1200 to push it i have a pyramid 1600 pushing it now and it does ok but from reading stuff in this forum they are $hi++y amps so i think the profile will be much better any help out there