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Amazon.com: DS18 HOOL-X15.2DHE 15 Inch Competition High Excursion Car Subwoofer 4000 Watts Rms 4" Dual Voice Coil 2 + 2 Ohm DVC - Powerful Car Audio Bass Speaker : Electronics
Amazon.com: (2) New RE Audio SR PRO 10D4 SRPRO10D4 10" 640w RMS DVC 4 Ohm Car Subwoofers : Electronics
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Amazon.com: RE Audio SXX15D4 15-Inch Composite Cone with Dual 4 Ohm Performance Woofer : Everything Else
Amazon.com: RE Audio SXX15D4 15-Inch Composite Cone with Dual 4 Ohm Performance Woofer : Everything Else
Amazon.com: RE Audio SXX15D4 15-Inch Composite Cone with Dual 4 Ohm Performance Woofer : Everything Else