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Memphis Audio SRXE212V Dual 12" Bass System with Audison SR 1.500 D-Class Mono Bass Amplifier - Creative Audio
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Amazon.com: Alpine SWT-12S4 Car Speakers, Black : Electronics
Audison SR Series SR 1.500 1000W Mono Amplifier with VCR-S1 Sub Volume Remote Control and 2 Prima Series APS 10 S4S 10" 800W SVC 4 Ohm Woofer - Creative Audio
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Alpine SWR-10D4-25cm - 10"" Subwoofer" | eBay
Alpine - SWR-T12 Subwoofers Type-R Ultrapiatto da 30cm.