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Pioneer Electronics on Twitter: "The Champion Series Subwoofers feature an enclosed basket structure that is designed to support the steel basket by reducing the spread of vibration that causes bass loss frequency. #
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TS-D12D4 - 12" - 2000w Max Power, Dual 4 Ohms Voice Coil, Aramid Fiber IMPP Cone, Rubber Surround - Subwoofer | Pioneer Electronics USA
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Unboxing and review of Pioneer Champion Pro TS-W3003D4 subwoofer.Heavy built quality made in Vietnam - YouTube
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2-Pc. Pioneer TS-W312D4 12" Car Dual 4-ohm Subwoofer + QPower QBOMB 12" Dual Subwoofer Enclosure Box Bundle - Walmart.com
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