Request box building help
Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=30335
Printed Date: May 20, 2024 at 5:27 PM
Topic: Request box building help
Posted By: tmstl
Subject: Request box building help
Date Posted: April 14, 2004 at 8:21 AM
Hey guys. I have a couple of questions regarding box building. This is the first one that I have built (or attempted to build). I have looked at a couple of progs. out there to help me. I recently came across https://www.bcae1.com/ which has an applet to help figure out dimensions. The Support Engineer has given me the following specs. He stated that the total volume should be 0.75 cubic feet. I am planning on building a sealed box for 2 10" subs with 3/4 MDF. Any help on dimensions would be greatly appreciated! FUBR-10
• 1800 watts power handling
• 600 Watts RMS
• 160 oz. magnet
• 2” ASV voice coil
• SPL 90 dB
• Fs: 40.1 Hz
• Vas: 0.81 cu.ft.
• Qms: 3.47
• Qes: 0.60
• Qts: 0.5124
• Xmax: 0.6"
• Sealed box: .5 cu. Ft.
• Ported box: 1.15 cu.. Ft.
• Tuning: 39 Hz
• Port Size: 3”(dia)x8.6”(length)
• # of ports:1
Replies:
Posted By: DYohn
Date Posted: April 14, 2004 at 9:41 AM
I would recomend building an enclosure with two sealed chambers, one for each woofer, and making each chamber approximately 0.5 CUFT. A simple rectangular enclosure is the easiest to build when you are just starting out. Build one with interior dimensions for each chamber of about 12X12X10 would do the trick. Be sure to seal all joints with RTV or some other sealant and to use wood glue and plenty of screws to hold the enclosure together. ------------- Support the12volt.com
Posted By: TAudio
Date Posted: April 14, 2004 at 9:43 AM
First off what kind of car are you building in. If this is a trunk mounted box build one with a slanted back (a little more complicated but better internal acoustics). Your box will need to be at least 24" wide and 12" high. (1" spacing around each sub). I just built a box for two 10"s the other day dimensions 28" wide, 12" high, 14" bottom depth, 12" top depth. The coustomer wanted it all in 1 chamber so with no internal braces this is about 2 cu. ft. or 1 cu ft per box . If you shortened this design to 24" you would have about 1.7 cu ft or .85 cu per sub (remember you have to subtract the volume of your sub from these numbers to get total volume). You could shorten the top depth some if you wanted less space. If you add an internal divider (separate into 2 chambers) this would also decrease your volume. Use 1 5/8" course thread drywall screws for fasteners and pre drill all holes (reduces chiping and crack outs) Make sure you seal every joint up good with clear silicone caulk once you have put the pieces together.
good luck
-------------
If quiters never win, and winners never quit, who the heck came up with the idea that you should quit while your ahead?
Posted By: alex75
Date Posted: April 14, 2004 at 10:52 AM
I just built a new box (not my 1st but 1st in a long time) for a pair of Audiobahn 10s. I pretty much just used the diagrams and tips from this site along w/ specs. from the AB website. The box is the perfect size and perfectly tuned. I'm certainly no expert, but it was mad easy with help from this site! Make sure to use a circular saw or tablesaw to make your cuts. Taudio and Dyohn have all your bases covered! Oh yeah, don't forget to seal all your MDF w sealant (silicon or polyurethane). Another trick I always do is use square head or hex head screws to attach the subs to the box. Most would be stereo thieves don't carry the specific tools necessary to remove.
Posted By: 00neon
Date Posted: April 14, 2004 at 10:56 AM
alex75 wrote:
I just built a new box (not my 1st but 1st in a long time) for a pair of Audiobahn 10s. I pretty much just used the diagrams and tips from this site along w/ specs. from the AB website. The box is the perfect size and perfectly tuned. I'm certainly no expert, but it was mad easy with help from this site! Make sure to use a circular saw or tablesaw to make your cuts. Taudio and Dyohn have all your bases covered! Oh yeah, don't forget to seal all your MDF w sealant (silicon or polyurethane). Another trick I always do is use square head or hex head screws to attach the subs to the box. Most would be stereo thieves don't carry the specific tools necessary to remove.
whats the AB website? im looking to build a box for my jl 12w3v2 w/ a slant front where the sub would mount, but all i need is measurements...............i cant find them anywere..........anyhelp? ------------- 1 JL 12 w3 D4
1 MTX 421 D Monoblock
1 Sony Xplod 75x4
Front: Alpine SPX-177A
Rear: JL audio VR690-CXI
Posted By: tmstl
Date Posted: April 14, 2004 at 11:39 AM
Man, you guys continue to amaze me!!! Thanks for all of your help and responses. I am going to start this weekend.
Posted By: kickerstang
Date Posted: April 14, 2004 at 11:53 AM
you can figure out your own dimensions man, just take the boxes L x W x H = your total area(but remeber if you are using 3/4" MDF you need to subtract 1.5 from each number example: your box is 12 x 12 x 12, you would multipy 10.5 x 10.5 x 10.5) ok, once you find your total, like 10.5 x 10.5 x 10.5 =1157.625, divided the total by 1728, this will give you your airspace in cubic ft. like 1157.625 would be .67 ft3. just play around with some different number until you get measurements and airspace that fit what you are trying to do.
-------------
what!?!?! you want some??
Posted By: alex75
Date Posted: April 14, 2004 at 1:11 PM
By AB website I meant Audiobahn. For JL subs check out the official JL Audio website. Most manufacturers will give specific specs for their products-like recommended sizes for ported and sealed boxes. Ust the diagrams this site offers to figure out dimensions for a wedge box.
|