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2x RCF SUB8004-AS 18" Professional Subwoofer W/ 2x RCF ART945-A Active Speaker
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QSC KS118 3600W 18 inch Powered Subwoofer | Sweetwater
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Active HIFI Subwoofer 6.5 Inch Woofer 100W Audio Speaker for Amplifier Home Theater Loudspeaker Stereo Strong Bass Music Player
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Eastech Philips Active Subwoofer Speaker 6.5" 4-oHM 100w | eBay
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200W 12-inch Active Subwoofer Speaker Home High-power Home Theater HiFi Fever Audio Super Subwoofer High Fidelity Audio Box
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Amazon.com: Focal Sub One Active Subwoofer Black : Electronics
JBL EON715 15-inch Powered Speaker and EON718S 18-inch Powered Subwoofer PA Bundle | Sweetwater