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XMAXX Subwoofer – American Car Audio
Amazon.com: American Bass XMAXXX 15" Subwoofer 8500 Watts Max Dual 1 Ohm X-Max Monster Sub : Electronics
Amazon.com: TIMPANO 12" Sub D2 2500 Watts Max Power Dual 2 Ohm, 12 Inch Car Subwoofer 23.5 mm High Xmax, TPT-T2500-12 D2, 3 in Voice Coil, Competition Sub Woofer for Car Audio