Picture of Acrylic Subwoofer Enclosure for under a car seat.

Hello hello. First off this is my first instruct-able and as such i welcome and questions and comments that come my way and will entertain them as best i can.

My scooby is kinda small ... so space management is a must and was my main concern for this build. This box can built by any novice (like me) with minimal effort and time for around $100 in material (excluding the sub/amp). Enjoy

Things you will need:

1) 1/4" thick {the thicker the better} acrylic or plexi glass
2) quilt batting
3) acrylic glue {i hear acetone from a saloon works also but not sure}
4) silicone
5) fine pointy paint brush
6) 1"- 1.25"self drilling #8 or #10 screws to attach the sub-woofer.
7) duct tape and sand paper
8) jig saw or dremmel
9) sub-woofer and amplifier
10) drill, basic hand tools, and a socket set
11)  table saw or circular saw will make your life much easier
12)i think that's everything... lets get started!

Step 1: Can you feel.... the bass?

Picture of Can you feel.... the bass?
first do some math and measuring as every car will be different. i have a 2007 Subaru Impreza 2.5i and i came up with an enclosure size of 5and 7/8" total  enclosure height {6.75" tall with sub }  12.5" wide and 14.75" long. 

After you measure find the surface area of the cube with LxWxH for each side (a cube has 6 sides) and go out and procure your acrylic... or lexan... or whatever.

***side note*** i chose acrylic b/c its cheaper than lexan and way better than wood for its size... at least that's what i think i learned from all those forums.

*** fun fact ***  the enclosure is also not supposed to be a symmetrical shape due to re-verb and sound distortion .... something along those lines.... but i have had little if any problems like that with my build.

*** also under my seat i have re routed some cables for the air bag sensor and bent some metal out of the way and gained some extra room***

*** remember to leave height for butt clearance if you ever plan on having a passenger***
cheesehead (author) 2 years ago
Thank you bsodgergren for clarifying. I did not know that. ( obviously ) haha.
bsodergren3 years ago
acetone is what you use to clean up the acrylic glue that you inevitably get over every thing.

you don't use acetone to "glue" or weld acrylic together.

Acetone is also good for cleaning up fiberglass resin.
abadfart4 years ago
thanks i made one of theas out of mdf and it sounds great when added to my stock system
cheesehead (author)  abadfart4 years ago
Happy to hear it went well!
How did you cut your acrylic? i tried a couple months ago to make a little speaker for my room and couldnt get straight cuts with a knife or saw... Nice subaru by the way...
cheesehead (author)  Evinisinhawaii4 years ago
Also hole saw's work very well
cheesehead (author)  Evinisinhawaii4 years ago
Sorry it took so long to reply I have not had time for projects in a while. I used a whole saw and a fine tooth jig saw cuz I didn't need it to be a perfect cut for the speaker hole. For the clean cuts I used a table saw at a low blade setting. ... If it is thin acrylic I would suggest using a razor blade knife to score it and then snap it... Practice first on some scrap piecesd
cheesehead (author) 4 years ago
ahh. well thank you. i love my suby. anyways. i used a table saw to cut most of my acrylic since it was almost 1/4 inch thick. it was very effective ... i also used a hand held jig saw which worked better than expected. thank you for the question. please let me know if i can help with anything else.
cheesehead (author) 4 years ago
note: it fits way better when you don't switch to a diff. sub after the box is completed because it would fit way better if it was even 1/4" shorter.