world27owns Posted May 25, 2015 Author Report Share Posted May 25, 2015 I might be able to fit a new one in it facing forward or rear. I just would lose some cubes so was not sure if that would be a better route unless it was that crucial. When I got my box in I had to have three people help lift it in due to the angle I had to go in to prevent tearing the top of the sub. If I can get it out without seeing it cause any damage to the sub I will try and get it out as is otherwise I will have to sawsall it out. But my height was also 15 inches plus a 1/2in trim ring in order to clear the port so i have some room to work with. My next build I will definitely re think doing an 18 in the trunk, but for this year I am at least attempting to get some higher DB's out of it before I go that route. Link to comment Share on other sites More sharing options...
Joe X Posted May 25, 2015 Report Share Posted May 25, 2015 There's this type of design (sub reverse mounted) to fit a 18" in a trunk, since you have 15H I think it's feasible : Only problem is that is harder to build. Link to comment Share on other sites More sharing options...
diegoclass2010 Posted May 25, 2015 Report Share Posted May 25, 2015 There's this type of design (sub reverse mounted) to fit a 18" in a trunk, since you have 15H I think it's feasible : Only problem is that is harder to build. i like this build it! Link to comment Share on other sites More sharing options...
world27owns Posted May 25, 2015 Author Report Share Posted May 25, 2015 You guys are scaring me. 18 sp4 recommends 6cubes min for ported. I have 20inches clearance in the trunk but with previous box I was only able to get a height of 15 and length of 30 I had less then an inch of clearance to angle it in I though it wasn't gonna go in. Link to comment Share on other sites More sharing options...
Karkov Posted May 25, 2015 Report Share Posted May 25, 2015 single layer 3/4" MDF for a 18" FI SP4? yes, lots of box flex dude 2007 Chevy Tahoe (SOLD) 12 ~ FI Audio X series 10" w/BP option 2 ~ DC Audio 5.0K @0.67 3 ~ DC Audio 5.0K @1.0 2 ~ PPI 3 way sets (not installed yet) 1 ~ RF T400-4, 1 ~ RF T600-2, 1 ~ RF T600-4 4 ~ CT Sounds 5.25" Strato comps (rear fill only) 1 ~ XS Power D4800 1 ~ XS Power D3400 8 ~ XS Power XP3000 160 stock alt, Mechman 370 Elite, 185 DC Power 320+ Sq. Ft. Sound Deadener Pioneer AVH-X5500BHS Youtube: https://www.youtube.com/user/knfjdkghjudfhsgkjdhf/videos?sort=dd&view=0&shelf_id=0 Link to comment Share on other sites More sharing options...
world27owns Posted May 25, 2015 Author Report Share Posted May 25, 2015 The top had another piece inside 28.5 x 36.5. But ya I am starting to realize that now. Link to comment Share on other sites More sharing options...
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