Odd shape of sub enclosure

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=74471
Printed Date: May 05, 2024 at 10:14 PM

Topic: Odd shape of sub enclosure

Posted By: baca_85
Subject: Odd shape of sub enclosure
Date Posted: March 14, 2006 at 1:50 PM

EDITED BY MODERATOR

Hey, this is the first time I ask a question so if I do it wrong I apologize. I have a 2001 Nissan frontier and Im trying to install 2 12" Phoenix golds in the back but the space is very reduced. I was thinking of building the enclosure to fit perfectly in place without removing stock parts of the vehicle but that gives it a strange forms with too many edges, drops and curves. The cubic inches would be ok for my subs but, do you think the strange shape would give it a bad sound

PLEASE DO NOT USE AN EDITOR LIKE WORD TO COMPOSE YOUR POSTS!

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Replies:

Posted By: One_Evil_Necro
Date Posted: March 14, 2006 at 2:23 PM

You should be fine with the strange shapes =)

Posted By: stevdart
Date Posted: March 14, 2006 at 4:20 PM

The stranger, the better...and you'll fit right in with this crowd ;)

Seriously though, the tremendous amount of added effort in designing and building this box will be worth it for the custom look you'll achieve. For a spectacularly weird shape, the best way to figure air volume is to actually build the enclosure to fit using cardboard that is duct-taped together. Put it together just as the normal box would be built and even cut the holes for the subs (razor knife for this step!). When done, pull it out of the truck and fill it with the smallest size packing peanuts you can find.

You will have a volume of packing peanuts that you can measure in liters, or convert to cu ft. If you respond to this reply and want to go this route, I'll link to a converter online that you can use. You would also have to account for the difference in wall thickness between cardboard and MDF, and I can show you how you can accomplish that.

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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.

Posted By: Francious70
Date Posted: March 14, 2006 at 10:53 PM

Honestly, strange shapes are better than cubes. The back wave from the cone will riccochet off the rear wall in a cube, and then smack the back of the cone, causing resonance. Audible?? Probabally not, but why worry when it's just as easy to make an odd shape.

Posted By: mukrainetz
Date Posted: March 15, 2006 at 6:22 PM

I have the same issued, and if anyone is still reading this post I have attached a photo of my box in progress. Ask any questions youd like. I used basically the same principle as setvdart says with the cardboard. I spent hours cutting and hot gluing cardboard together to get a shape that fits exactly - even built exact size subs and amp so I knew I would have no problems later..... The amount of cuts are insane, the angles as well be prepared to waste a few pieces of mdf if thats what your using just from cutting a wrong angle. The picture is pre-amp rack and pre covering which I wont be doing for a while. Make some comments.
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Posted By: Francious70
Date Posted: March 16, 2006 at 10:05 AM

Looks good. Got any other pictures, what vehicle is it going in?

Posted By: mukrainetz
Date Posted: March 16, 2006 at 2:52 PM

Sorry if this goes in twice but the last post didnt show up.

The setup is going in my 2006 Toyota Yaris in the hatch. It fits perfect between the wheel tubs. I didnt want to cut up my car and it has to be removable. It tucks in behind the back seats, under the stock parcel shelf and between said wheel tubs. You dont see it unless the hatch is up.

The amp rack is 3/16 x 1.5 inch steel which will bolt to the box at a slightly steeper angle between the two subs.

Ive also included a pic of the amp.

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