Centered port with single sub setup?

[chambiec1 10+ year member]

Hey guys. My car is a '92 Pontiac Bonneville. In the back it has a folding armrest, with an access to the trunk (I believe they call it the ski hole?). Like so:

As of now, I have a standard slot ported box, 4.5^3FT at 34Hz, sub and port back:

Since my car has the hole through the rear armrest, I have wanted to try to utilize that somehow with a new box build. What I want to ultimately achieve is to have a centered port, firing through the rear armrest, with my sub firing back(or up if needed). Problem is, I don't know how to go about designing a box like this, or if it is really even possible to get it to sound decent, and ultimately be louder than my current setup.

I drew up this shitty diagram of how I would want things to be layed out:

Now my question is about the design of this. Could anybody give me a little help/insight on how to even begin the design process like this. Or better yet, if someone has an existing design that they have done similar to this, that would be a big help.

Let me know what you guys can do, or if my idea is just wack.

-Casey

Click to read more...

 

[chambiec1 10+ year member]

And just for clarity, if it will work out, I would like to keep it the same size/dimensions it is now.

4.5^3 FT

36W x 17H x 18D

Tuning would be around 32-34 Hz

 

[Falder 10+ year member]

That'd be pretty sweet if it works out.

 

[chambiec1 10+ year member]

That'd be pretty sweet if it works out.

I hoping it does... and if it does, I am hoping the output will be better than my current box.

 

[jnralp00 10+ year member]

probably be better to fire your sub up in this case.

 

[Ken448 10+ year member]

have to wonder what kind of sound comes from JUST the port, and JUST the speaker..

 

[Nova76 10+ year member]

this is the same thing i wanted to do with my box design but i dont have a fold down armrest i just took my back seat out haha its a nice way to let all the bass in but i think the way you have it in that pictre should work just have the port going straight back if needed then have it turn so its faceing the sub inside the box

 

[rumple4skin 10+ year member]

talk with boxdesigner he has said tons of shit about all different box's. if it can be tuned to a frequency worth a shit he will tell you your specs

 

[chambiec1 10+ year member]

have to wonder what kind of sound comes from JUST the port, and JUST the speaker..

Que¿

 

[miker 5,000+ posts]

This is my next build, but with an aero.

 

[rumple4skin 10+ year member]

no shit well post something on it after you get it done i would like to do this aswell but the box makers in my home town are morons

 

[chambiec1 10+ year member]

This is my next build, but with an aero.

Care to elaborate a little?

 

[miker 5,000+ posts]

Care to elaborate a little?

I'm building a 2.5 c f box with a 25.25in x 6in tube coming out the back and porting through the center ski hole.

 

[chambiec1 10+ year member]

I'm building a 2.5 c f box with a 25.25in x 6in tube coming out the back and porting through the center ski hole.

Any design pics? I'm just trying to keep my options open.

Is the aero going to be internal or external? What about sub placment?

 

[dbhittin 5,000+ posts]

sub up/port into arm rest.. did that in my caddy.. worked awsome.. u can also take the rear speakers out of the deck, if their there.. that helps