Custom Box making instructions
10-05-2001, 02:10 PM
#2
Senior Member
Join Date: Jan 2001
Posts: 778
Re: Custom Box making instructions
Originally posted by Nismo
Does anyone know any sites that have the blueprints for various enclosures?
Does anyone know any sites that have the blueprints for various enclosures?
Don't necessarily have blueprints, but if you go to JL audio's webpage that "tutorials" to box building techniques and practices.
Polk used to give blueprints for their speakers in specific enclosures, but I don't know if they still do that or not.
Most likely you are going to have a hard time unless you look for those designs for your specific subs. There are too many variables to have specific blueprints for all subs.
10-05-2001, 10:12 PM
#3
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Posts: n/a
Way too many variables for every car, every sub, etc. And the all important "Me" factor. That's the most important thing when custom building a sub. The fact that it sounds great because you designed it that way. I recommend you read at least one of the following: Great Sound Stereo Speaker Manual, David Weems, or The Loudspeaker Design Cookbook, Vance ****ason. Both are widely recognized as excellent starter to mid level enclosure techniques. And farely easy reading. If you don't have 20 credits of calc then skip those sections and rely on others for crossover design and construction. I do that even with around 20 credits of calc just because I don't use that math now that I am out of school.
10-06-2001, 07:51 AM
#4
Senior Member
Join Date: Nov 2000
Posts: 1,985
golden rule
Most go by the rule of 0.6:1:1.6 as a ratio of the sides for a ported box. Get the speakers recomendation for are needed and stick +/- 20%. Get some quality MDF board and screw in every inch. Be sure to seal your box well with caulk, and don't forget where the wires enter. If the box is to be ported get some PVC. For a ported box the size is not as important as with a bandpass. I've done a lot of experimenting with boxes and first I earned stick to the manufactures reomendations espicially if they give you box volume or an actual box size. Next important is a good seal and a strong box. As for the 20 credits in calc I'm 8 short.
10-06-2001, 08:23 AM
#7
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Join Date: Nov 2000
Posts: 1,985
=box volume in cubic feet
Originally posted by loudmaxima
umm...
L*W*H
----- =air space
1728
umm...
L*W*H
----- =air space
1728
This will give you box volume in cubic feet from the L,W,H when they are in inches.
12in/ftx12in/ftx12in/ft=1728ft cubed
is where the 1728 comes from.
If you use this use the inside box L,w,h, that is take away the width if the material. You only want to measure the air volume. And as loudmaxima said also subtract the volume of the port and speaker.
10-06-2001, 07:07 PM
#8
Senior Member
Join Date: Sep 2000
Posts: 272
blaupunkt has a program u can download its called blau box it is a real simple box program... but u need the parameters of the speaker u have or goin to buy.... u can make a band pass box, sealed encloser, vented, and wedgeshaped...
10-07-2001, 10:38 AM
#9
Guest
Posts: n/a
Re: golden rule
Originally posted by theMax
Most go by the rule of 0.6:1:1.6 as a ratio of the sides for a ported box. Get the speakers recomendation for are needed and stick +/- 20%. Get some quality MDF board and screw in every inch. Be sure to seal your box well with caulk, and don't forget where the wires enter. If the box is to be ported get some PVC. For a ported box the size is not as important as with a bandpass. I've done a lot of experimenting with boxes and first I earned stick to the manufactures reomendations espicially if they give you box volume or an actual box size. Next important is a good seal and a strong box. As for the 20 credits in calc I'm 8 short.
Most go by the rule of 0.6:1:1.6 as a ratio of the sides for a ported box. Get the speakers recomendation for are needed and stick +/- 20%. Get some quality MDF board and screw in every inch. Be sure to seal your box well with caulk, and don't forget where the wires enter. If the box is to be ported get some PVC. For a ported box the size is not as important as with a bandpass. I've done a lot of experimenting with boxes and first I earned stick to the manufactures reomendations espicially if they give you box volume or an actual box size. Next important is a good seal and a strong box. As for the 20 credits in calc I'm 8 short.
10-08-2001, 08:00 AM
#10
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Posts: n/a
No, you don't "need" any calc. But don't expect it to sound optimal. Each speakers specs vary in general by at least 5-10%, and who knows if the manufacturer actually gave you the specs for the right speaker. The pro's, and the people of Madisound, actually test the parameters of speakers and crossover components for a smooth, accurate response. If you have a school physics lab you may have access to all the test equipment you need, other than the test box that you will need to build.
10-10-2001, 07:13 AM
#15
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Posts: n/a
Originally posted by Aussie Maxima
recommend building fibreglass boxes for subs. I have mine in the rear quarters in the boot firing in. these work very well as they dont take much space. it is also air tight.
recommend building fibreglass boxes for subs. I have mine in the rear quarters in the boot firing in. these work very well as they dont take much space. it is also air tight.
Do you have any trouble getting the lid to close? I mean with the vents in the bottom of the quarters sealed?
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