BIG_KNOCKS Posted July 21, 2014 Report Share Posted July 21, 2014 I have a single cvx15 that I'm playing with and I have decided to build a single reflex bandpass for it. Can somebody help me out with some killer gross internal specs! I need square inch port opening and depth tuned at 45hertz as well I'm a carpenter so the build will not be hard Link to comment Share on other sites More sharing options...
Krakin Posted July 21, 2014 Report Share Posted July 21, 2014 You need a port area of 109.6e-9homesteads, with a rear chamber of 2 bushels and a front chamber of 4 bushels. The port length needs to be 63 barleycorns. That is net volume not gross volume so you need to subtract the displacement of the port, walls, and the sub. Krakin's Home Dipole Project http://www.stevemeadedesigns.com/board/topic/186153-krakins-dipole-project-new-reciever-in-rockford-science/#entry2772370 Krakin, are you some sort of mad scientist? I would have replied earlier, but I was measuring the output of my amp with a yardstick . . . What you hear is not the air pressure variation in itself but what has drawn your attention in the two streams of superimposed air pressure variations at your eardrums An acoustic event has dimensions of Time, Tone, Loudness and Space Everyone learns to render the 3-dimensional localization of sound based on the individual shape of their ears, thus no formula can achieve a definite effect for every listener. Link to comment Share on other sites More sharing options...
boom50cal Posted July 21, 2014 Report Share Posted July 21, 2014 You need a port area of 109.6e-9homesteads, with a rear chamber of 2 bushels and a front chamber of 4 bushels. The port length needs to be 63 barleycorns. The more drunk you get the more you will understand that post. Basically, if you're looking to build a 4th, you're going to do it 4 times before you're right. On 1/4/2013 at 9:31 PM, HatersGonnaHate said: Wow. 184 posts and I think you're a fucking asshole. Link to comment Share on other sites More sharing options...
Krakin Posted July 21, 2014 Report Share Posted July 21, 2014 You need a port area of 109.6e-9homesteads, with a rear chamber of 2 bushels and a front chamber of 4 bushels. The port length needs to be 63 barleycorns. The more drunk you get the more you will understand that post. Basically, if you're looking to build a 4th, you're going to do it 4 times before you're right. Those are legitimate specs for his sub. Krakin's Home Dipole Project http://www.stevemeadedesigns.com/board/topic/186153-krakins-dipole-project-new-reciever-in-rockford-science/#entry2772370 Krakin, are you some sort of mad scientist? I would have replied earlier, but I was measuring the output of my amp with a yardstick . . . What you hear is not the air pressure variation in itself but what has drawn your attention in the two streams of superimposed air pressure variations at your eardrums An acoustic event has dimensions of Time, Tone, Loudness and Space Everyone learns to render the 3-dimensional localization of sound based on the individual shape of their ears, thus no formula can achieve a definite effect for every listener. Link to comment Share on other sites More sharing options...
Phaeton Posted July 21, 2014 Report Share Posted July 21, 2014 You need a port area of 109.6e-9homesteads, with a rear chamber of 2 bushels and a front chamber of 4 bushels. The port length needs to be 63 barleycorns. The more drunk you get the more you will understand that post. Basically, if you're looking to build a 4th, you're going to do it 4 times before you're right. Im pretty happy with my 4th and i only had to build it once. 1997 subaru legacy outback Four 15's in a almost wall Rockford Fosgate t2500-1bdcp Rockford Fosgate T400-4 on tweets Rockford Fosgate T400-4 on highs Rockford Fosgate T400-2 on midrange Rockford Fosgate T400-2 on midbass Optima Yellow top batteries 270A Singer alt (working on a bracket for a second) Lots of Second Skin Link to comment Share on other sites More sharing options...
BIG_KNOCKS Posted July 21, 2014 Author Report Share Posted July 21, 2014 Can I get those specs in square inches? Link to comment Share on other sites More sharing options...
BIG_KNOCKS Posted July 21, 2014 Author Report Share Posted July 21, 2014 Preciate the advice, but can somebody put me on with some internal gross specs that's going to be killer I need port square opening cubic inches and depth for my kicker dual 4 cvx-15? Any more specs? Link to comment Share on other sites More sharing options...
Krakin Posted July 21, 2014 Report Share Posted July 21, 2014 You should be able to figure out those if you are a carpenter. Krakin's Home Dipole Project http://www.stevemeadedesigns.com/board/topic/186153-krakins-dipole-project-new-reciever-in-rockford-science/#entry2772370 Krakin, are you some sort of mad scientist? I would have replied earlier, but I was measuring the output of my amp with a yardstick . . . What you hear is not the air pressure variation in itself but what has drawn your attention in the two streams of superimposed air pressure variations at your eardrums An acoustic event has dimensions of Time, Tone, Loudness and Space Everyone learns to render the 3-dimensional localization of sound based on the individual shape of their ears, thus no formula can achieve a definite effect for every listener. Link to comment Share on other sites More sharing options...
CleanSierra Posted July 21, 2014 Report Share Posted July 21, 2014 Edit - Disregard, this was all me thinking you had 2 subs needing a box Im not the one you want to try to troll. Just a fyi for you. Link to comment Share on other sites More sharing options...
dolarbilz Posted July 21, 2014 Report Share Posted July 21, 2014 9-10 cubic feet, 180(minimum) inches of port and that's assuming a tune of around 48 Hz. So if you're talking about a square port, that's about a 13.5X13.5" square. With 10 cubes internal NET space, this makes your port(sharing no common walls) ~10" deep. Port size: 13.5X13.5X10 Total port area: 182" Tuning frequency: ~ 48 Hz Port displacement: ~ 1.27 cubic feet Box needs to be 4-6 cubes sealed chamber, 10-18 cubes ported chamber. No one can give you specifics because on paper and in the vehicle are two different things. If you want a 4th order bandpass design for those subs and your car, find someone that will take the time and pay them. Can we pay you ;-) Link to comment Share on other sites More sharing options...
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