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Amazon.com: Pyramid 6" Car Audio Speaker Subwoofer - 300 Watt High Power Bass Surround Sound Stereo Subwoofer Speaker System w/ Molded P.P. Cone, 86 dB, 4Ohm, 40 oz Magnet,1 inch KAPTON Voice
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Amazon.com: Audiopipe TS-CVR6 Subwoofer 6-inch Woofer 150 Watt Max 4 Ohm DVC 1.5” 4-Layer Dual Voice Coil BASV : Electronics
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