2K XJ Posted June 3, 2012 Report Share Posted June 3, 2012 Hey guys I recently purchased 3 Sundown SA-8 V2s, and need to build a box for them. Only problem is, I've never built a box before... I'm extremely motivated to learn but I need you guys' help to help me make the design. Box specs for the subs are .5 to .75 cubic feet per woofer .1 cubic foot of dispacement per woofer tuned to 30-35 hertz My specs for the box are really broad. I'm going to be porting them. I have plenty of space in the back of my Jeep. My max dimensions are 42" length x 22" width x 18" height. I would like for the box to stretch across all 42" of the back. I plugged in numbers and 3 subs at .75 cubic feet apiece are 2.25 cubes. A box that is 42" x 10" x 9" is 2.19 cubic feet so I got it pretty close to that, but I have no idea how to do a port. I'm not sure where in the 30-35 hertz range to port it, and have no idea how to design/calculate the port. If anyone with any box building experience could please help me I would greatly appreciate it! Quote 1999 Jeep Cherokee SportLifted on 31'sPopcorn Sounds AX6000.1 w/ AA 500.1 "THE F1X" board4 Obsidian Audio OA15's C pillar wall @ 29hz ^^^work in progress^^^ Link to comment Share on other sites More sharing options...
john253a Posted June 3, 2012 Report Share Posted June 3, 2012 Can't design one at moment as I'm mobile But 25-27sq" of port 1.8cuft net at 32-33hz Don't tun over 33 unless you really need to or no the peek of you ride. Quote Link to comment Share on other sites More sharing options...
john253a Posted June 3, 2012 Report Share Posted June 3, 2012 dont no if your after something like this, or if you want subs up or all forward, but let us no, and well try to help out where we can Quote Link to comment Share on other sites More sharing options...
2K XJ Posted June 3, 2012 Author Report Share Posted June 3, 2012 Thanks John your design looks great its actually pretty much exactly what I wanted to do I just couldn't figure out how to make the port. I just have one question, how big are the pieces for the port? I'm trying to make my cut sheet and with your dimensions I have gotten all the pieces expect these three... Quote 1999 Jeep Cherokee SportLifted on 31'sPopcorn Sounds AX6000.1 w/ AA 500.1 "THE F1X" board4 Obsidian Audio OA15's C pillar wall @ 29hz ^^^work in progress^^^ Link to comment Share on other sites More sharing options...
Joe X Posted June 3, 2012 Report Share Posted June 3, 2012 (edited) The internal depth at the port section less the port width 10.5 - 2.25 = 8.25", if you have a little more depth a simple L port design will be far easier to do though, the port being made with two pieces of wood only. Edited June 3, 2012 by Joe X Quote Link to comment Share on other sites More sharing options...
2K XJ Posted June 3, 2012 Author Report Share Posted June 3, 2012 The internal width less the port width 10.5 - 2.25 = 8.25", if you have a little more depth a simple L port design will be far easier to do though, the port being made with two pieces of wood only. Hah thanks man...that should have been easy for me to figure out...guess not though, lol. But I think I'll stick to this design to keep as much cargo space as I can. Quote 1999 Jeep Cherokee SportLifted on 31'sPopcorn Sounds AX6000.1 w/ AA 500.1 "THE F1X" board4 Obsidian Audio OA15's C pillar wall @ 29hz ^^^work in progress^^^ Link to comment Share on other sites More sharing options...
2K XJ Posted June 3, 2012 Author Report Share Posted June 3, 2012 (edited) OK so for my cut sheet I came up with this... All the pieces being cut from 4' x 8' 3/4" MDF Edited June 3, 2012 by 2K XJ Quote 1999 Jeep Cherokee SportLifted on 31'sPopcorn Sounds AX6000.1 w/ AA 500.1 "THE F1X" board4 Obsidian Audio OA15's C pillar wall @ 29hz ^^^work in progress^^^ Link to comment Share on other sites More sharing options...
john253a Posted June 3, 2012 Report Share Posted June 3, 2012 1/16" off 1 1/8" out 1 19/32" width of each cnr of the port And 1" off 2 1/16" out 2 59/64" width in the sub area Quote Link to comment Share on other sites More sharing options...
2K XJ Posted June 3, 2012 Author Report Share Posted June 3, 2012 1/16" off 1 1/8" out 1 19/32" width of each cnr of the port And 1" off 2 1/16" out 2 59/64" width in the sub area I'm sorry but I don't really understand what that means... could you put it in more simple terms or something? Sorry, I'm kind of a noob to box building... Quote 1999 Jeep Cherokee SportLifted on 31'sPopcorn Sounds AX6000.1 w/ AA 500.1 "THE F1X" board4 Obsidian Audio OA15's C pillar wall @ 29hz ^^^work in progress^^^ Link to comment Share on other sites More sharing options...
john253a Posted June 4, 2012 Report Share Posted June 4, 2012 (edited) Sorry thought you ment the 45's Was typing and driving on way to work The port pieces are 12" high x 8.25" long and rounded on one end The 45's 12h x 1 19/32 wide with 45 going in And 12h x 2 59/64 wide with 45 going in Edited June 4, 2012 by john253a Quote Link to comment Share on other sites More sharing options...
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