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Amazon.com: DS18 GEN-X124D Subwoofer in Black - 4 Layer Black Aluminum Voice Coil, 12", 900W Max Power, 450W RMS, Dual 4 Ohms - Powerful Car Audio Bass Speaker (1 Speaker) : Everything Else
Polk Audio HTS 12 Powered Subwoofer with Power Port Technology | 12” Woofer, up to 400W Amp | For the Ultimate Home Theater Experience | Modern Sub that Fits in any Setting
Amazon.com: Cadence PXM812X8-8”x12” 400W High Power Car Audio MidBass Driver 8 Ohms : Electronics
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Massive Audio SUMMO64XL 6.5"Single 4 Ohm 400W 1.5" V.C. Subwoofer | Big Jeff Online Inc
EV ZX-4 Lightweight 15In Loudspeaker 400W@8 Ohms Passive Full Range Speaker : Electronics