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Amazon.com: 4x Harmony HA-P12LS16 Replacement 12" Pro PA 800W Subwoofer - Speaker 16 Ohm Sub : Musical Instruments
Amazon.com: AudioPipe TXX-BDC4-12D 12 Inch 2,200 Watt High Performance Powerful Dual 2 Ohm DVC Vehicle Car Audio Subwoofer Speaker System, Black : Electronics
Harmony HA-P12LS8 Replacement 12" Sub Pro PA 800W Subwoofer/Speaker 8 Ohm Woofer - 90oz Magnet : Musical Instruments - Amazon.com
Amazon.com: 12'' Portable Wireless Bluetooth Speaker System - Built-in Rechargeable Battery, Wireless Microphone, USB/Micro SD/FM - 80 Watt - FM Radio with Digital LED Display, PWMA1299A : Electronics
Amazon.com: (2) Rockville 12" 1200W DJ PA Speakers+Sub+Stands+Crossover+Powered Mixer+Cables : Musical Instruments
Amazon.com: 5 CORE 12" inch Full Range Subwoofer Car Audio Dual Cone Speakers Give High Powered Sound Quality, 23 oz Heavy Bass Replacement Premium DJ Subs RMS 75W Peak 1200W, 8 Ohms