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How to: Install an Amp & Subwoofer in your Audi or Any Make - YouTube
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2013 Audi A4 Powered Subwoofer Install - YouTube
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2013 Audi A4 Powered Subwoofer Install - YouTube
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Amazon.com: PIONEER 10" Single VC 1200W WOOFER : Electronics
Pioneer 10" 1300 Watt 4 Ohm Shallow Mount Subwoofer - TSD10LS4 – Sweetheart Deals
