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In this video I go through what makes a good subwoofer, as well as specs to look out for. Features mentioned: 0:00 Introduction 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)