Welcome to the North American Subaru Impreza Owners Club Tuesday May 30, 2023
Home Forums Images WikiNASIOC Products Store Modifications Upgrade Garage
Go Back   NASIOC > NASIOC Subaru Models > Baja Forum

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.

* As an Amazon Associate I earn from qualifying purchases. 
* Registered users of the site do not see these ads. 
Thread Tools Display Modes
Prev Previous Post   Next Post Next
Old 10-16-2011, 11:46 AM   #1
Scooby Newbie
Member#: 43545
Join Date: Sep 2003
Location: St. Louis
2000 03 Baja
Collision Tech / Painter

Thumbs up custom Sub box for Baja

I built a variation of the sub box already posted.

First I used the dimensions from this thread :


(I used caulk to seal up all the seams while constructing it, it's too skinny to caulk after it's built.)


Then I eliminated the rear portion that sticks thru the bed opening.

once I had the small "truck box", I mocked it up, and threw it behind the seat.

with everything in place, I traced the opening of the bed pass-thru.

Then I ran a peice of 1"3/4 tape on that line, and traced it.

This moved the hole to be cut, inward about 2".

I used a gigsaw, and cut this panel out. Then put it on stilts about 4" out from the back of the box.

I draped the enclosure in fleece (sweatshirt material will also work), and stapled to the original line I traced of the rear access pass-thru.

Then I stapled it to the sides of the box, too.


Then came the stinky, itchy stuff.

I slathered the thing with 2 quarts of liqud fiberglass resin, and after 20 minutes it was hard and ready to sand.

I buzzed it all down with 80 grit on a DA, then slathered it again with 1 qt.

Buzzed it again with 80 grit on a DA, then smeared the whole thing with body filler to smooth it.

Sanded, filled, and sanded again. Finised with 180, primed, sanded with 320, and painted it.


The next day, with dry paint, I added some strips of threshhold that I painted black. I got them from Home Depot, and cut to size.

This added a bit of protection and ruggedness because it is in the bed of a truck after all.


Oh, I also sunk the speaker in flush against the front of the box. Do this while building the box, not after it's done!

I covered the box in charcoal felt, and added some furniture footings to push against the rear seat and keep the box tight against the weatherstrip of the bed.

I installed radio shack binding post terminals on both sides, and stuffed a good size chunk of pink fiberglass insulation inside, on both sides of the enclosure.

Then I hooked up my 10" Dual Voice Coil Sony Xplod speaker.

Interior cubic dimensions are just under 1 cubic foot, 0.9. Perfect for a 10"!

box can fold down if needed, and can come out in a matter of seconds.

Last edited by Jungle_44; 10-16-2011 at 11:54 AM.
Jungle_44 is offline   Reply With Quote

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Custom Sub box for 08 sedan? Calum W. Car Audio, Video & Security 2 06-10-2008 07:59 PM
WTB: Dual 8" custom sub boxes for Impreza coupe Danny Boy NESIC Private Classifieds 5 01-01-2007 03:09 PM
wtb custom sub box for sti dwaynesti VIC Private Classifieds 3 09-19-2006 12:45 AM
FS JL Audio 127 with custom sub box for STi trunk wrx what Mid Atlantic Impreza Club -- MAIC 9 01-03-2006 10:51 AM
Custom sub box for max hatch space in WRX wagon nixima Car Audio, Video & Security 24 05-08-2002 06:21 AM

All times are GMT -4. The time now is 01:10 AM.

Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2023, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2023 Axivo Inc.
Copyright ©1999 - 2019, North American Subaru Impreza Owners Club, Inc.

As an Amazon Associate I earn from qualifying purchases.