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Amazon.com: Pyramid 12 Inch Car Subwoofer Speaker - 700 Watt High Powered Car Audio Sound Component Speaker System w/High-Temperature Kapton Voice Coil, 88 dB, 4 Ohm, 80 oz Magnet - Pyramid PW1277X : Electronics
Amazon.com: DS18 SLC-8S Subwoofer in Black - 8-Inch Speaker, 400W Max Power, 200W RMS Power, Aluminum 4 Layer Voice Coil, Black Steel Frame, SVC, 4 Ohm Impedance, Ferrite Magnet (1 Speaker) (SLC8S) : Electronics
Amazon.com: Polk Audio DB+ 10 Inch 1050 Watt 4 Ohm DVC Marine & Car Subwoofer | DB1042DVC : Electronics
Amazon.com: DB Bass Inferno BIW2 12S4 Single Voice Coil Subwoofer : Electronics
Amazon.com: Pyramid 6" Car Audio Speaker Subwoofer - 300 Watt High Power Bass Surround Sound Stereo Subwoofer Speaker System w/ Molded P.P. Cone, 86 dB, 4Ohm, 40 oz Magnet,1 inch KAPTON Voice
Amazon.com: PRV AUDIO 6MB200 v2 6.5 Inch Speakers Midbass Woofer 8 Ohm, 100 Watts RMS, 200 Watts Program Power, 93.5 dB 1.5 in Voice Coil for Small Custom Enclosures Pro Car Audio System (Single) : Musical Instruments
Amazon.com: MTX TN10-04 Audio 10 inch 300 Watt Car Audio 84.9 dB 4 OHM Single Voice Coil Subwoofer (4 Pack) : Electronics
Amazon.com: MTX Audio 10" 300W 84.9 dB 4 OHM Single Voice Coil Subwoofer | TN10-04 (8 Pack) : Electronics