Hi im trying to make a speaker box for my subs but i dont know how to do cubic messuerments im not sure how much space i need for each one im putting them in a 1993 jeep wrangler and how or whats the best way to run my amp to my speakers or subs and what size amp should i use thanks a bunch
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The unit only requires .5 Cubic feet of volume for the enclosure. It would be best to figure out how much space you have to work with and then make a box to fit that space. If not measure the whole front of the speaker across the face. Allow 1/2 to one inch on either side. Lets say it is 12 inches. You need 14 to mount it easily, you can use less though. So you now know that your box has to be 14x14 length and width. Measure the distance from the magnet to the edge of the rim of the front. Lets say 5 inches, you now have 14x14x5. That comes to 980 cubic inches. To convert to feet you divide 980 by 1728 which is .56 cubic feet and that would be enough.. Measure (inside area, not the outside), make sure there is clearance for the magnet on the back so it is not touching the bottom of the box you need.
Well, 1.6 cubic foot for a 15 is not nearly enough. A ported box for 1 15 should be in atleast 3 cubes by itself. I suggest building a new box yourself or getting someone else to do it for you. If factory specs on those subs is no larger than 3 cubes per sub then I'd get the box built to 3 cubes per sub after all displacement and tune it in the upper 30's range. Putting big subs like that in a small sealed enclosure can and will damage a sub. and if you try to port an enclosure that is too small to begin with that will also hurt the woofer. Do it right or learn the hard way.
almost any 10 will use .75 cubic feet up to 1.25 cu ft. thats about the size of a milk crate give or take. a sealed box will give you the cleanest tightest bass. A ported box will be louder but also larger at the cost of decreased power handling ability and sound quality. If your subs are designed for small enclosures use a sealed box around .75 to 1.00 cu ft.
It depends on the size of the subs- 8z 10z 12z 15z? whether or not you port the box is up to you- a ported box is generally louder than a sealed box -as you are coupling and tuning the sound from the rear of the driver with the sound generated from the front of the sub- but the box is also generally larger as well.Then aside from your preference of ported/sealed you have to account for the recommendations of the manufacturer as to whether the sub/speakers are meant to be placed in a ported or sealed enclosure. Most 10 inch subs do well in a box that yields .75 cubic feet to1.0 cubic feet.most 12z do well in 1.0 cu feet to 1.5 subic feet and 15z do well in 1.5 to 2.5 cubic feet. I have a set of 15z that require 4.25 cubic feet per sub-so its important to look into the manufacturers recommendations. The easiest box to make would be a sealed enclosure-and the sound quality generally yields a tighter more accurate bass sound along with increased power handling capability- try going to rockford fosgate .com and look into the woofer box wizard its a program that calculates air space for whatever size box you have room for-hope that helps you-good luck
Wow you are in luck, I used to be an Audiobahn dealer. Designing sub enclosures is my fulltime job. So here you go.-
If you are looking for sound that is very smooth, and has a very low end shaking everything setting off car alarms. You will need a PORTED BOX that is 3 CUBIC FEET FOR EACH SUB WOOFER. It actually calls for 2.7cu.ft but after you add speaker displacement and bracing it should be at least 3 cu.ft. The port can be either round or square made of plastic or 3/4" wood respectively. My port suggestions are dependent on how much space you have. The shortest round port might make some noise (too much pressure!). So think about that first. Anyway the short port is 3" diameter and 15.5" long. The longer port is 4" in diameter and 28.25" long. The rectangular wood port can also be either (port measurements are inside diamensions) 3" w x 3" w x 18.5" long (short port) or 2 w x 10.5 h x 48' long. The second longer wood port is recommended most but will take up a lot of space. The fact that you have to subtract the port volume from the box makes for space issues in cars. Also the second wood port sounds better and won't make much wind noise, but takes up .75 cu.ft worth of space. So in plain english your box will have to have an internal volume of 3.75cu.ft. An example of this could be made of 3/4" thick MDF, have 1" x 1" internal bracing and measure (box dimensions are external and assumes the use of 3/4" MDF) 12" h x 18" w x 30" deep. The port is an integral part of the box fitting inside. I'm sorry I can't provide any drawings to make things easier. Now this box size is one that I ran through a computer program I use. So it is not the same as the manufactures recommendations. I will list those as well.
The second box is an example using a round short port and also uses 3/4" MDF, 1 x 1" bracing, the 3" dia x 15.5" long port, and measures 12" x 18" x 24" externally.
If space is an issue try checking out the information below. -I got it from Audiobahn-
If for some reason it doesn't show up or you need assistance let me know. Good luck and enjoy your new setup-I'm sure you'll be happily disturbing the peace soon!
Model # AW1006T
Air Space (Cu. Ft.) 0.65
Port Size (Inches) 2 x 6.5
Port Vel. (%) 48.31
-3dB (Hz) 31.5
Tune Freq. (Hz) 40
Sub Disp. (Cu. Ft.) 0.21
Port Disp.(Cu. Ft.) 0.01
Total Vol. (Cu. Ft.) 0.75
Air Space (Cu. Ft.) 1.4
Port Size (Inches) 3 x 6.75
Port Vel. (%) 24.19
-3dB (Hz) 30
Tune Freq. (Hz) 39
Sub Disp. (Cu. Ft.) 0.21
Port Disp.(Cu. Ft.) 0.024
Total Vol. (Cu. Ft.) 1.5
Air Space (Cu. Ft.) 2.4
Port Size (Inches) 4 x 6.25
Port Vel. (%) 14.39
-3dB (Hz) 29
Tune Freq. (Hz) 39
Sub Disp. (Cu. Ft.) 0.21
Port Disp.(Cu. Ft.) 0.04
Total Vol. (Cu. Ft.) 2.5 EBP 74 80 80
Sealed NR NR NR
Minimum (Cu. Ft.) 0.5
Maximum (Cu. Ft.) 1 SPL (dB) 80
All sealed boxes already include the displacment for the subwoofer. NR = (Not Recommended)
do you want the box ported or unported (holes or no holes) if you don't got a lot of room than you dont want a ported box. keep in mind the box has to have the correct amount of cubic air space or you could seize your sub... if you're building it make sure you use OSB board (oriented strand board) or MDF board(medium density fiber) your sub needs .7cubic feet of air space in an unported box
If you can access the inside of the sub box by removing the speaker, you may be able to measure the 3 dimension of each side of the enclosure. 1 cubic foot is 12x12x12 inches cubed. That is 1728 cubic inches per cubic foot. If you measure the inside dimensions of one of the enclosure sides as 10x14x8 inches, then that is 1120. 1120 divided by 1728 is 0.648 cubic feet. Alternatively, you could estimate the volumes of each side of the box by measure the outside, figuring out where the box divider board is, subtracting the width of the boards used to make and then calculate. Otherwise, I do not know the enclosure that that sub comes in. Good luck. Let us know how it goes.