Twostrokeking Posted November 19, 2011 Report Share Posted November 19, 2011 Ive been messin around with torres box calc and i have some spare wood layin around. While i save for my new subs i want to build a ported box for my mtx 4000 10" i pretty much got it all figured out between the 12 volt calculator and torres. I want the box tuned to 33 htz. the problem is i cant figure out how to find port width? please help me! Ill be usin a slot port btw. this is my first ported box Quote My Truck BuildSpending money on things I don't need, to impress others I don't know.At the end of the day for me its about the love of customizing anything and everything to limits or even past reasonable.-SkyHighCarAudio Link to comment Share on other sites More sharing options...
mattc3366 Posted November 19, 2011 Report Share Posted November 19, 2011 Just keep playing around with numbers until you get 33hz . That's what I did when I was playing around with it. Quote subwoofers - two eclipse 88120s box - 3.4 cubes tuned to 32 hz amps - aq1200 and pheonix gold zx450 New build : 2 obsidian audio 15s same amp 6.1 cubic foot box tuned to 32 hz in a civic hatch Link to comment Share on other sites More sharing options...
Twostrokeking Posted November 19, 2011 Author Report Share Posted November 19, 2011 Just keep playing around with numbers until you get 33hz . That's what I did when I was playing around with it. haha thanks man but id like to really learn how to do this :/ i am very passionate about it Quote My Truck BuildSpending money on things I don't need, to impress others I don't know.At the end of the day for me its about the love of customizing anything and everything to limits or even past reasonable.-SkyHighCarAudio Link to comment Share on other sites More sharing options...
loudNlow87 Posted November 19, 2011 Report Share Posted November 19, 2011 Just keep playing around with numbers until you get 33hz . That's what I did when I was playing around with it. haha thanks man but id like to really learn how to do this :/ i am very passionate about it Port width..? Just try to stay within a 9:1 Height to Width ratio to avoid tuning shifts. Basically, just make the port height as tall as your box minus 1.5" (for internal measurements). Then just punch a number in for port width that sets you in the correct port area range. Usually between 12"-16" of port area per cubic foot of box volume is a good general rule of thumb. Quote '11 Jeep Patriot New Build Head Unit: Pioneer AVH-P3200DVD Front: Massive CK69 Components Front Amp: Massive NX2 Rears: Infinity Kappa's Subs: 8 Sundown SA-8 v2's Sub Amp: AB 450.1 XS D3100 Come on 150! Link to comment Share on other sites More sharing options...
Twostrokeking Posted November 19, 2011 Author Report Share Posted November 19, 2011 Just keep playing around with numbers until you get 33hz . That's what I did when I was playing around with it. haha thanks man but id like to really learn how to do this :/ i am very passionate about it Port width..? Just try to stay within a 9:1 Height to Width ratio to avoid tuning shifts. Basically, just make the port height as tall as your box minus 1.5" (for internal measurements). Then just punch a number in for port width that sets you in the correct port area range. Usually between 12"-16" of port area per cubic foot of box volume is a good general rule of thumb. okay i did an 11 inch high port, 2 inches wide and that gave me 15.94 inches ^2 of port area per foot. then i put that in on 12 volt slot port length calculator and i got 32.42" long. put that in on torres and it puts me at like 51 hrtz. What am i doing wrong?? Quote My Truck BuildSpending money on things I don't need, to impress others I don't know.At the end of the day for me its about the love of customizing anything and everything to limits or even past reasonable.-SkyHighCarAudio Link to comment Share on other sites More sharing options...
loudNlow87 Posted November 19, 2011 Report Share Posted November 19, 2011 (edited) Just keep playing around with numbers until you get 33hz . That's what I did when I was playing around with it. haha thanks man but id like to really learn how to do this :/ i am very passionate about it Port width..? Just try to stay within a 9:1 Height to Width ratio to avoid tuning shifts. Basically, just make the port height as tall as your box minus 1.5" (for internal measurements). Then just punch a number in for port width that sets you in the correct port area range. Usually between 12"-16" of port area per cubic foot of box volume is a good general rule of thumb. okay i did an 11 inch high port, 2 inches wide and that gave me 15.94 inches ^2 of port area per foot. then i put that in on 12 volt slot port length calculator and i got 32.42" long. put that in on torres and it puts me at like 51 hrtz. What am i doing wrong?? Go to the "# of common port wall" box and put 3. What are you using for dimensions? Edited November 19, 2011 by loudNlow87 Quote '11 Jeep Patriot New Build Head Unit: Pioneer AVH-P3200DVD Front: Massive CK69 Components Front Amp: Massive NX2 Rears: Infinity Kappa's Subs: 8 Sundown SA-8 v2's Sub Amp: AB 450.1 XS D3100 Come on 150! Link to comment Share on other sites More sharing options...
Twostrokeking Posted November 19, 2011 Author Report Share Posted November 19, 2011 Just keep playing around with numbers until you get 33hz . That's what I did when I was playing around with it. haha thanks man but id like to really learn how to do this :/ i am very passionate about it Port width..? Just try to stay within a 9:1 Height to Width ratio to avoid tuning shifts. Basically, just make the port height as tall as your box minus 1.5" (for internal measurements). Then just punch a number in for port width that sets you in the correct port area range. Usually between 12"-16" of port area per cubic foot of box volume is a good general rule of thumb. okay i did an 11 inch high port, 2 inches wide and that gave me 15.94 inches ^2 of port area per foot. then i put that in on 12 volt slot port length calculator and i got 32.42" long. put that in on torres and it puts me at like 51 hrtz. What am i doing wrong?? Go to the "# of common port wall" box and put 3. What are you using for dimensions? 12Hx15Wx20D I am using 1/2" wood. and dont i have 1 common wall because the port will be on the far side? so the side of the box will be used as a port wall? Quote My Truck BuildSpending money on things I don't need, to impress others I don't know.At the end of the day for me its about the love of customizing anything and everything to limits or even past reasonable.-SkyHighCarAudio Link to comment Share on other sites More sharing options...
loudNlow87 Posted November 19, 2011 Report Share Posted November 19, 2011 (edited) Don't use 1/2" plywood. It's gonna flex like crazy. And that box is just too small. By the time you tune it low enough you have about a 1/2 a cube of volume. Go wider. And using the side of box for a slot port is 3 common walls. Edited November 19, 2011 by loudNlow87 Quote '11 Jeep Patriot New Build Head Unit: Pioneer AVH-P3200DVD Front: Massive CK69 Components Front Amp: Massive NX2 Rears: Infinity Kappa's Subs: 8 Sundown SA-8 v2's Sub Amp: AB 450.1 XS D3100 Come on 150! Link to comment Share on other sites More sharing options...
Twostrokeking Posted November 19, 2011 Author Report Share Posted November 19, 2011 (edited) Don't use 1/2" plywood. It's gonna flex like crazy. And that box is just too small. By the time you tune it low enough you have about a 1/2 a cube of volume. Go wider. And using the side of box for a slot port is 3 common walls. shit this is confusing haha. thank you for your help tho Edited November 19, 2011 by Twostrokeking Quote My Truck BuildSpending money on things I don't need, to impress others I don't know.At the end of the day for me its about the love of customizing anything and everything to limits or even past reasonable.-SkyHighCarAudio Link to comment Share on other sites More sharing options...
AmericanLegend Posted November 19, 2011 Report Share Posted November 19, 2011 Make the port square. This is the closest approximation to a circle that you probably feel like constructing out of 3/4 inch wood lol Quote Link to comment Share on other sites More sharing options...
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