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Amazon.com: 2x Harmony HA-P12LS8 Replacement 12" Pro PA 800W Subwoofer - Speaker 8 Ohm Sub : Musical Instruments
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Amazon.com: 2 Rockville RVP18W8 2400w 18" Pro Subwoofers 8-Ohm Raw Sub Woofers 90 Oz Magnets : Electronics
Amazon.com: PRV AUDIO 10 Inch Midrange Speaker 10MR1000X, 1000 Watts Program Power, 3 in Voice Coil, 8 Ohm, 500 Watts RMS Pro Audio Loudspeaker (Single) : Electronics
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: CT Sounds MESO-8-D2 1600 Watts Max 8 Inch Car Subwoofer Dual 2 Ohm : Everything Else