Choosing the right Subwoofer

In this video I go through what makes a good subwoofer, as well as specs to look out for.
Features mentioned:
0:17 - Power handling/Impedance
1:57 - Size
3:05 - Brands
4:32 - Fs (Resonance)
5:29 - Xmax (Excursion)
7:04 - EBP (Efficiency Bandwidth Product)
8:14 - SPL (Sensitivity/Efficiency)
10:05 - Vas (Equivalent air volume)
11:39 - Qts (Peakiness)
12:39 - BL (Motor force)
13:23 - Mms (Moving mass)

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