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Amazon.com: 5Core 8" Inch Subwoofer Replacement DJ Speaker Car Loudspeaker 100W 4 Ohm WF 8110G : Electronics
Harmony HA-P12LS8 Replacement 12" Sub Pro PA 800W Subwoofer/Speaker 8 Ohm Woofer - 90oz Magnet : Musical Instruments - Amazon.com
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2X Harmony HA-P12LS8 Replacement 12" Pro PA 800W Subwoofer - Speaker 8 Ohm Sub : Musical Instruments - Amazon.com
Amazon.com: Pyle 6.5 Inch Mid Bass Woofer Sound Speaker System - Pro Loud Range Audio 300 Watt Peak Power w/ 4 Ohm Impedance and 60-20KHz Frequency Response for Car Component Stereo PLG64 : Electronics
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: Pyramid WH88 8-Inch 250 Watt High Power Paper Cone 8 Ohm Subwoofer