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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: B&C 12FW76 12" Professional Woofer 8 Ohm : Electronics
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Amazon.com: SAVARD Speakers Rap Series 8" inch Dual 4 Ohm Subwoofer : Electronics
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Amazon.com: Massive Audio GTX84 – 8 Inch Car Audio Subwoofer, High Performance Subwoofer for Cars, Trucks, Jeeps - 8" Subwoofer 400 Watt RMS, 800w MAX Dual 4 Ohm, 2 Inch Voice Coil. Sold Individually : Electronics
Amazon.com: 4x Harmony HA-P12LS8 Replacement 12" Pro PA 800W Subwoofer - Speaker 8 Ohm Sub : Musical Instruments
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Amazon.com: Harmony HA-P12LS8 Replacement 12" Sub Pro PA 800W Subwoofer/Speaker 8 Ohm Woofer - 90oz Magnet : Musical Instruments
Amazon.com: Pyle 5 Inch Woofer Driver - Upgraded 200 Watt Peak High Performance Mid-Bass Mid-Range Car Speaker 450Hz - 7kHz Frequency Response 15 Oz Magnet Structure 8 Ohm w/ 92dB and Paper
Amazon.com: Rockville RVW1500P8 1500w 15" Raw DJ Subwoofer 8 Ohm Sub Woofer 70OZ Magnet : Electronics