I've been working on the next gen of my home subwoofer, figured I'd post it to add to the collection.
Image Dynamics IDQ15 D4 v2
Fs = 21.5
Qes = .309
Qms = 6.1
Qts = .280
Vas = 258 liters
Xmax = 13.5mm (linear excursion)
Xlim = 25mm (spider's very non-linear, so not easily getting to...