dr3q Posted June 6, 2013 Report Share Posted June 6, 2013 need help in building a ported box for my 2 alpine type r subs 12" subs are in a prefab box and sounds horrible when turned up more than half way im running them on a audioque 2200d amp its inside my 2001 jeep cherokee the dem for space available is 40.5 inches in length x 17 inches height x 30 inches depth please if any one can help me with box design or set up for what i have it would help alot this is my first box build my self so any info and suggestions please and thanks Link to comment Share on other sites More sharing options...
Joe X Posted June 7, 2013 Report Share Posted June 7, 2013 Ok dr3q the first thing is to set your gains properly like with a DD-1 and check your electrical system to be able to handle the 2200D since that can have an effect specially when you are playing loud, here is a box suggestion, if you need something changed let me know AND check the notes below the sketch: Enclosure Specifications:Fb = 34 HzVb = 3 ft^3External Height = 16.75 inExternal Width = 41 inExternal Depth = 14 inPort Width = 3 inCut Sheet List:* All Dimensions in Inches.* Wood Thickness is 3/4 for all Parts.External Enclosure Parts:2 x Top & Bottom (3 parts) = 41 x 14Left & Right Sides = 12 1/2 x 14 1/22x Front = 19 x 14 1/2Back = 41 x 14 1/2Shared Port Internal Assembly Parts:2 x Front to Back = 11 x 14 1/22 x Extension = 11 3/4 x 14 1/2 Assembly guide (generic dimensions): Important notes:- The 45s if you want to do them are 2 1/2" wide except the one/ones inside the port, if you want that let me know.- All boxes built outside the vehicle need to fit in their way in not just have the right dimensions.- The port needs 3" of free airspace in front of it for proper operation.- Setting your amp subsonic filter to 28Hz is suggested. Link to comment Share on other sites More sharing options...
dr3q Posted June 7, 2013 Author Report Share Posted June 7, 2013 thanks for help just a quick question which box design would i get better sound from the one above or one with subs facing out and side ported ? and my amp says clipping when i turn the music past 35/50 the light pulses to the beat of the song playing ? any suggestions for this cure ? and what should my amp be set to because i dont want to blow the subs Link to comment Share on other sites More sharing options...
Joe X Posted June 7, 2013 Report Share Posted June 7, 2013 As before you need to upgrade your electrical system so that it can be able to source the power the amp produces and set your gains right, there is a device sold here on SMD to do that or you can have it done by some one else, that should be the first problem you need to solve or you could damage your hardware. On the box the one above can definitely work but everyone is different and usually it takes tests to find out what you like best. Link to comment Share on other sites More sharing options...
Big Dogg Posted April 13, 2019 Report Share Posted April 13, 2019 I'm need help with a box for 4 12 Alpine Type R's for the back of a 99 Subaru Impreza outback sport width 37 in height 20 in depth 45 in Link to comment Share on other sites More sharing options...
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