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Pair Alpine SWR-1542D Type R 15" 4000 Watt DVC 4 Ohm Car Audio Subwoofers Subs - Walmart.com
Custom Ported/Vented Sub Box Subwoofer Enclosure for 1 15" Alpine Type R Subwoofer - 3.1 CF - 32HZ : Electronics - Amazon.com
FS: Alpine Type R 15" Subwoofer (1542 dual 4ohm) - Car Parts - PakWheels Forums
Measurements for a Sub Box for an Alpine Type R
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Custom Ported Sub Enclosure Box for a 15" Alpine Type R SWR-15 ~ 1/2" PLEXIGLASS | eBay
Beginner Alpine Type R custom box build - YouTube
Sealed / Recessed Sub Box Enclosure for 1 15" Alpine Type R SWR-15 Subwoofer | eBay
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Amazon.com: Compatible with 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014 Ford Mustang Coupe Alpine S-W10D4 Type S Car Audio Subwoofer Single 10" Custom Sub Box Enclosure Package : Electronics