box design

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=73089
Printed Date: May 02, 2024 at 11:49 PM

Topic: box design

Posted By: wanabecarguy
Subject: box design
Date Posted: February 18, 2006 at 3:11 PM

i have an escort wagon and am trying to put 4 12's in the hatch but am having troubles with the design. what is a good gap between the box and the hatch? i am putting the vents facing the hatch and having the subs fire upwards to the roof.

any help would be great

Replies:

Posted By: kirktcashalini
Date Posted: February 18, 2006 at 7:54 PM

Do you need all the seats? You can't get rid of the back seats and build a wall, if not I completely understand, I am just wondering. 4 12s, vented and firing at the hatch is going to probably destroy something on a escort, assuming you are using quality woofers and amps, which I hope you are since your building the box yourself. I dont know how big the main trunk is on one of them, but 4 12s isnt all that big, if you can squeeze them closely in the box, maybe a zig zag pattern or soemthing.

'   O O
' O O   <- but more in each other up and down? I dont know but good luck.

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99 Blazer LT.   Yellow Top. Big 3. Infinity Kappa Speakers All Around. Jensen CD/DVD flip out. 2 Infinity Kappa Perfect 12DVQs powered by a Alpine PDX600.1 (in one custom box, building a FG box)

Posted By: stevdart
Date Posted: February 19, 2006 at 2:58 AM

I designed this system for four subs some time back for someone to fit into a tight space. It uses two separate enclosures to make it easier to build them and put them in the car. Of course, size specs can be changed to suit your sub/ box spec, but just for the principle of it, here it is:

posted_image

Besides the "box-wrangling" factor, the benefits of this over a single, 4-driver upfiring config is:

maximizes use of the available height of the hatch space
reduces the gravity sag on the drivers
allows for the combination normal/inverted look
directs the waves toward the upper back part of the vehicle

But there is more effort needed to do this because of the difference in box volumes that are needed to be calculated because of the differences in driver displacement. Wiring for the combination normal/inverted has to be thought out and executed properly. And your woodworking and calculating skills have to be higher to achieve these angles.

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Build the box so that it performs well in the worst case scenario and, in return, it will reward you at all times.