dstnparr Posted February 18, 2015 Report Share Posted February 18, 2015 I am getting 2 american bass hd 15's for my 2009 ford focus. I am going to have to build the box inside my car and I am not entirely sure what size to make the box. I was thinking that I would go with a 6.8 cu. ft. box after taking off the volume of the mdf and tuning the port to right around 32hz. Does anyone have any ideas that could improve my box or help me hit a higher spl? Link to comment Share on other sites More sharing options...
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