world27owns Posted May 24, 2015 Report Share Posted May 24, 2015 Went out to my first comp today. The highest I hit was 139.9 on a 34 hz burp. I think there might have been some major flaws in my box design looking for suggestions for another box. I am not opposed to any suggestions at this point but due to trunk size the sub will have to face upward. Just looking to get a little louder. Setup 05 Chevy Malibu 1 18 FI SP4 DC Audio 2k A3 (2000rms) Sky High Big three (2/0) OFC Sky High (1/0) OFC ran to back XS D3400 (starting) XP3000 (Rear) Box (3/4 MDF) Exterior Height 15in, Width 38in, Depth 30in Port 34hz (opening facing inside cabin on bottom of box) Height 2in, Width 36.5 in, Length 18 in The top (sub holding side) was braced with another sheet of mdf 36.5 x 28.50 The port side was also braced the same way The port itself had 2 3/4 x 3 in mdf "leg" supports in the rear When I first played it I had about 1-3 inches of flex on bottom of the box which I was able to reduce by putting in multiple 3 inch lag bolts. Link to comment Share on other sites More sharing options...
Joe X Posted May 25, 2015 Report Share Posted May 25, 2015 No subs up in trunk cars. Link to comment Share on other sites More sharing options...
world27owns Posted May 25, 2015 Author Report Share Posted May 25, 2015 How do I make the 18 work then? if I cut back on length and am able to fit it in the trunk should I face rear or front? Link to comment Share on other sites More sharing options...
ToNasty Posted May 25, 2015 Report Share Posted May 25, 2015 Slant or switch to a 15 ***Super Sellers List***http://www.stevemeadedesigns.com/board/topic/25829-super-sellers-buyers Link to comment Share on other sites More sharing options...
Triticum Agricolam Posted May 25, 2015 Report Share Posted May 25, 2015 Your port had a really high aspect ratio (2:36.5), not the more efficient port shape. That layout does't make the box any stronger either, which is probably why you were having flex issues. Whatever you do next, I'd orient your port differently. "Nothing prevents people from knowing the truth more than the belief they already know it.""Making bass is easy, making music is the hard part."Builds: Link to comment Share on other sites More sharing options...
world27owns Posted May 25, 2015 Author Report Share Posted May 25, 2015 I feel like I lost a lot of DB from the bottom flexing having no bracing at all (besides bottom to port). What about a setup like this with a port on one side facing in 3 common walls. Exterior Height 14 Width 38 depth 32 Port inner Height 12.50 width 5 length 8.5 35.97hz 7.43 cubes after displacement (minus bracing to be determined) Actually bracing with mdf vertically on the inside Link to comment Share on other sites More sharing options...
diegoclass2010 Posted May 25, 2015 Report Share Posted May 25, 2015 yea bro the 18 is gonna be hard to make it work. switch to 12s or 15s. i also have a malibu. the only other way i could see this 18 working is in 4th order using your spare tire as the seal side and firing thru the rear deck or thru the fold down seats. Link to comment Share on other sites More sharing options...
world27owns Posted May 25, 2015 Author Report Share Posted May 25, 2015 I am pretty much stuck for while until I could save up to get a 15 or 15's. I currently do have it firing through the fold down seats. As I lack the box building expertise (didnt brace current box) I haven't even attempted to look into a 4th order. Spare tire has been removed since box build though so its currently unused space. Link to comment Share on other sites More sharing options...
Triticum Agricolam Posted May 25, 2015 Report Share Posted May 25, 2015 Like others have said, you will have better luck switching out your 18" for something you don't have to have firing up. If you are going to go to the effort of rebuilding your box you might as well make what ever changes you need to to do things right. Otherwise you will just be trying to find the least detrimental way to do things incorrectly. "Nothing prevents people from knowing the truth more than the belief they already know it.""Making bass is easy, making music is the hard part."Builds: Link to comment Share on other sites More sharing options...
diegoclass2010 Posted May 25, 2015 Report Share Posted May 25, 2015 go thru my build log so you can get an idea of what i was talking about... http://www.stevemeadedesigns.com/board/topic/190498-chevy-malibu-rebuild-4th-bandpass-trunk-video-page-7/ Link to comment Share on other sites More sharing options...
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