Weez
The math was too much so I put them both in WinISD.
I took the extremis numbers fron the DIY cable site, and the M165X from GR. Assume they are right?
M165X Qtc 0.71, 23.4L or 0.85ft3, f3 64Hz, f10 37Hz
in a 16L box, Qtc 0.81, f3 65Hz, f10 41Hz
in a 10L box, Qtc 0.96, f3 70 Hz, f10 47 Hz
extremis Qtc 0.71, 9.4l or 0.33ft3, f3 64 Hz, f10 37 Hz
I guess 24L is just under a cubic foot which isn't that bad, but if you want a small box, the extremis is the way to go.