Does anyone know where the sub woofer is located? I have a 2015 Rushmore Franklin. It doesn't sound quite right, a bit of a rattle.
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2015 Rushmore Franklin, 1999 Ford f-250 Super Duty (too many mods/improvements to list)
2008 Lincoln MKX
2000 Jaguar S type
2007 Harley FLHTCUI