This was an interesting design for this guy.

Design calls for 2 boxes.

One specifically for daily driving music and another for straight competition.

The designs are for an SUV.

Setup-

4 Sundown SA-8s off of 2 Sundown SAE-1200ds

Daily Driver-

3.6cuft tuned to ~31hz

Now for the almighty SPL box.

A true spl box is one that can be continuously modified until maximum output is found.

This doesn't just mean port length tuning but firing direction too!

The following box design is an interchangeable baffle. Yep, you read that right, interchangeable baffle with 4 position port firing locations capable PLUS the capability of fine tuning this box from 32.5Hz - 62Hz.

Please Note, THIS IS AN SPL BOX. DO NOT ATTEMPT TO PLAY MUSIC WITH THIS BOX OR YOU COULD RIP THE SUBS TO PIECES!

Also, when testing with this box, if you come across a part of testing where you found the right port length but the subs are bottoming out, contact me about building a larger corner piece at the back of the port to reduce volume low enough to prevent such action from happening.

Here is SPL box-

So, how does the interchangeable baffle work?

If you look at the floor of this box, you will see 4 cutouts for the 8s. ALL 6 sides of this box are dual layered 3/4" wood.

The top floor piece is cut for 4 8s. The bottom floor piece is NOT GLUED but just secured into place for testing and is a solid sheet of wood.

The top to this box will be 2 layers of wood BOTH cut out for the mounting of the 4 8s.

ONLY GLUE the bottom layer of the top to the box. The top top part of the box is just secured into place, not glued at this time.

Test with this firing position with subs up to the left and port firing to the left.

Next, turn box around 180 degrees and have port firing to the right with subs up to the right.

When u are done with that testing, remove the top top piece and the bottom bottom piece and swap them!

Now you can flip the box upside down and be able to test with port firing to the front left or the back right instead of before- back left or front right.

this is a multi test design to prevent from wasting money and time on building multi designs.

Once all testing is complete, GLUE the remaining top and bottom piece into place.

Like always, if you approve, let me know via PM.

You got skills my man. Always thinking outside the box.

hey Rusty, got your other design for ya.

2 12" Treo's 3.2cuft tuned to 35hz-

Email me for the approval.

Edit- there will be corners in the port, just didnt put them in there.

I got one for ya!

Edited December 20, 200915 yr by DD9915D!!!