FREE 15" BOX DESIGN: 4 cuft @ 34hz (Sub up, port back)

[SSS 18734 5,000+ posts]

Here is a simple design for member schackel (or anyone else who decides to use it). It's even short enough that it can still be used in most trunks. He will be using two of these boxes for a pair of Fi BL's in his Chevy Suburban.

After all displacements:

3.93 cubic feet

Tuned at 34.3 hz

52 square inches of port

(Displacement of a Fi BL 15 is 0.18 cubic feet)

Start out by constructing the base, sides, and the port.

Finish it up with the two baffles. Outline the port and the walls on the baffles, and make the following measurements. Then find the center of the circle by drawing lines from corner to corner of the resulting rectangle. You can also move the cutouts to wherever you please.

For the other box, just move the port to the other side of the box and flip the baffles.

Click to read more...

 

[terra 5,000+ posts]

why 2 boxes?

 

[SSS 18734 5,000+ posts]

He wants to be able to take them in and out on his own.

 

[on1wheel01 10+ year member]

ok i've always wondered what affect does making the l port wall longer inside the box or shorter

 

[SSS 18734 5,000+ posts]

ok i've always wondered what affect does making the l port wall longer inside the box or shorter

I'm not sure what you're asking. Rephrase ftw?

 

[bonesninja 5,000+ posts]

52 sq. inches of port....not cubic

 

[schrummy 10+ year member]

its .723 cubic ft of port

 

[bonesninja 5,000+ posts]

its .723 cubic ft of port

yeah i know...he has 52 cubic inches of port.....its 52 square inches

 

[on1wheel01 10+ year member]

ok like on the re calc the port l2 one it puts it at 8" automatically

 

[SSS 18734 5,000+ posts]

My bad - glad to see the typo police are here!

 

[bonesninja 5,000+ posts]

My bad - glad to see the typo police are here!

//content.invisioncic.com/y282845/emoticons/pullover.gif.ac2de04a20ebe8c72a715e86e00c8c0d.gif

don't want you confusing the noobixz

 

[schackel 10+ year member]

Thanks A Bunch Sss! Build Starts Tomarrow Wooo!