7cuft @ 32Hz, 2 Fi Q 15s *pics*

[CadillacMatt 10+ year member]

Hey guys, just got home from a long day at "work" (mostly building my box on the clock //content.invisioncic.com/y282845/emoticons/laugh.gif.48439b2acf2cfca21620f01e7f77d1e4.gif) This is a 7cuft ported box tuned @ 32Hz, much thanks to Chris at Fisher Customs for working up the design for me!

This is gonna be the new home of 2 Fi Q 15's, which I expect to arrive sometime next week. I used 2 4x8 sheets of 3/4" MDF and went through about 3 drill batteries //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif. Me and my buddy built it today off an on it took us about 4 hours, what do you think?

All cut down

The framework

Starting to look like a box

Double baffles in place

All caulked up

Whew... finished!!

Click to read more...

 

[WildSebring 10+ year member]

Looks good. //content.invisioncic.com/y282845/emoticons/veryhappy.gif.fec4fed33b4a1279cf10bdd45a039dae.gif

 

[bjfish11 5,000+ posts]

Looks very good man. Nice job.

 

[tez4life Premium Member]

x2 to all the above, nice job.

 

[mlstrass 5,000+ posts]

port walls "appear" to extend too deep. How far off the back wall are they? Good size/tuning for the Q's though, you'll be happy with them...

 

[PhatTonyDeMarco 5,000+ posts]

Yeah man, there is like 2 inches of space there, that was a bad idea.

 

[CadillacMatt 10+ year member]

port walls "appear" to extend too deep. How far off the back wall are they? Good size/tuning for the Q's though, you'll be happy with them...

3 1/4" space from the back. And there are sound deflectors in each corner.

 

[mlstrass 5,000+ posts]

that should be 1/2 the port width I'm guessing, so you'll be fine. How much power you going to run to them?

 

[bjfish11 5,000+ posts]

I figured it was just a camera trick. I dont see Chris making the mistake of having the end of the port too close to the back.

 

[mlstrass 5,000+ posts]

that's what I figured also, unless he measured/cut wrong, but he says it's good. just the camera angle.

Those subs will wang in that box...

 

[theothermike 10+ year member]

what the general rule of thumb for having those splitter pieces when u have a dual enclosure with a single port down the middle? the piece thats a triangle in between the port in the middle of the box?

how wide should it be? and the length of the two isoceles sides?

 

[DNick454 10+ year member]

Is there an advantage sound wise to not having a center divider for the port for each sub?

 

[CadillacMatt 10+ year member]

that should be 1/2 the port width I'm guessing, so you'll be fine. How much power you going to run to them?

You are correct. The port width is 6 1/2" so half would be 3 1/4". I'm getting the DVC 1 ohms to wire them at a final 1 ohm load on an AQ2200D, so they'll be getting around 1100wRMS, a tad less perhaps for not wanting to push them too hard (I've had people tell me they run 1500w+ to the Qs but I am not going to be stupid with them //content.invisioncic.com/y282845/emoticons/redface.gif.62fdbfe1a101588a808c4cff71bcb942.gif.)

Is there an advantage sound wise to not having a center divider for the port for each sub?

Not sure maybe someone else would be able to answer that for you //content.invisioncic.com/y282845/emoticons/veryhappy.gif.fec4fed33b4a1279cf10bdd45a039dae.gif

what the general rule of thumb for having those splitter pieces when u have a dual enclosure with a single port down the middle? the piece thats a triangle in between the port in the middle of the box?
how wide should it be? and the length of the two isoceles sides?

This would be a good question for one of the more experienced box builders, but for this setup I started with 4 2" blocks and 45'd them on the table saw.

 

[bdawson72 5,000+ posts]

That box is just like mine in just about every way, shape, and form.

 

[Immacomputer 10+ year member]

Is there an advantage sound wise to not having a center divider for the port for each sub?

Well, you save 3/4" of the total width but there are no sonic advantages. It's always better to have the center divider as it keeps turbulence down when the two port sections meet. The triangle in the back will help with that but a center divider would be much more effective and would allow only one side to be hooked up at a time with no ill effects.

what the general rule of thumb for having those splitter pieces when u have a dual enclosure with a single port down the middle? the piece thats a triangle in between the port in the middle of the box?
how wide should it be? and the length of the two isoceles sides?

The most effective way to do it would be to have the distance from the edge of the port wall be 1/2 of the total port width away from the midpoint of a 45-45-90 triangle. Once you have that point, you can find the lengths of the triangle.

This picture will explain what I typed much better: