ODBsCrackPipe Posted July 28, 2015 Report Share Posted July 28, 2015 I need help with a ported Sub box for my 2015 GMC Sierra Double Cab (Four Door Extended Cab). I would love if someone had blueprints so I can build it myself. If it could be Down firing with the 2 ports facing forward, but I wont be picky. --Thank You Everyone MAX size (Front Height 11" , Back Height 7.5" , Depth 16.5" , Width 55") - Recomended Ported Box Size- 1.0 Cubit Foot per Sub - I think it should be tuned to 32hz Sundown Audio SD-3 10" Dual 4 Ohm RE : 7.00 ohmsFS : 25.5 HzVAS : 39.3 LQES : 0.50QMS : 3.53QTS : 0.43LE : 7.49 mHBL : 18.57 NAMMS : 152 gCMS : 260 uM/NSENS : 83.1 dB Quote Link to comment Share on other sites More sharing options...
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