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CT SOUNDS | Tropo 18 D4 | 18 Inch Car Subwoofer |600W RMS | 1200W MAX Power | Dual 4Ω (Ohm) | 3" Voice Coil |Kickass | SQ and SPL | Competition Grade | Massive Sound | Powerful Bass - Walmart.com
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Amazon.com: CT Sounds TROPO-18-D2 18 Inch Car Subwoofer Dual 2 Ohm, 1300 Watts Max : Everything Else
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