USED JBL JRX-118SP Powered 18" Subwoofer — Dirt Cheep
Boss Audio Systems 600-Watt 8-Inch Subwoofer & 6.5 In Coaxial Speakers (2 Pair) - Walmart.com
Amazon.com: EMB Professional 12" 1200W SB-12 Replacement Speaker for JBL, Peavey, Cerwin Vega, Gemini, EMB, BMB, Pyle-Pro, Mr.DJ & Many Brands! Protects the woofer and speaker in open installations.
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2) JBL JRX212 12" 1000 Watt DJ PA Speakers+Power Amplifier+Stands+Cables | Audio Savings
Resilient Sounds Team 18" D1 - 5000w RMS Subwoofer
Amazon.com: JBL Club WS1000 10" Shallow Mount subwoofer w/SSI (Selectable Smart Impedance) Switch from 2 to 4 ohm Bundled with Alphasonik Earbuds : Electronics
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JBL CLUB 600AM 600-Watt @ 2 Ohms Monoblock Class D Subwoofer Amplifier with Remote Level Control - Walmart.com
Amazon.com: JBL BassPro SL2 Active Underseat Car Subwoofer with Built in Amplifier - Under Seat 8'' Subwoofer Car with 125 Watt Power Amplifier : Electronics