can someone show me an example of a double tuned box

[aaron7114 10+ year member]

A member on here, "Relax" is designing me a box for my L5s. I am wanting the box tuned to 35 hz for daily and 50 hz for comp. However he has never seen a double tuned box so he wanted me to show him an example....then he would design me one.

Anyone help me out here?

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[Anotherguy 10+ year member]

I think you just want changable ports...

 

[aaron7114 10+ year member]

I think you just want changable ports...

Its going to be long rectangle port. Where I can just plug part of it.

 

[yacob.naif 10+ year member]

it's gonna be a SHORT port, with a longer one that slides in

 

[aaron7114 10+ year member]

it's gonna be a SHORT port, with a longer one that slides in

Couldn't it go either way?

 

[Immacomputer 10+ year member]

I have pictures of a "double tuned enclosure" but not what you really want. Removable ports can be a ***** to get right and can be just as difficult to cut and bolt into place.

it's gonna be a SHORT port, with a longer one that slides in

A good designer would make both port lengths close to the same but use port area as the varying factor.

 

[aaron7114 10+ year member]

This is pretty much like the box he is designing me. Not exactly some changes will be made. Its going to be a little longer and its going to be 1 box instead of 2.

That box is tuned to 35 hz. but like i said i want it to be tuned at 50 hz as well.

If I just had him tune it to one frequency could someone on here tell me how much I need to plug to change it to the other frequency I want?

 

[acold7dusta 10+ year member]

i think it will be easier to build two boxes, but thats me

 

[aaron7114 10+ year member]

i think it will be easier to build two boxes, but thats me

its not double tuned. He just tuned it to 35 hz but wanting it at 50 hz as well. That is not the exact box though.

 

[Immacomputer 10+ year member]

This is pretty much like the box he is designing me. Not exactly some changes will be made. Its going to be a little longer and its going to be 1 box instead of 2.
[img ] http://img.photobucket.com/albums/v652/J_rock777/dude3-1.jpg[/img]

That box is tuned to 35 hz. but like i said i want it to be tuned at 50 hz as well.

If I just had him tune it to one frequency could someone on here tell me how much I need to plug to change it to the other frequency I want?

If you "plug" anything on that port, you will DECREASE tuning, not increase it.

 

[aaron7114 10+ year member]

If you "plug" anything on that port, you will DECREASE tuning, not increase it.

Yeah I know. He will have to tune it to 50 hz then figure out how big the plug will have to be to change it to 35 hz correct?

 

[Chevyaudio 5,000+ posts]

You are going to need to make removeable ports to be exact...just stuffing something in there is not a good idea.

 

[aaron7114 10+ year member]

You are going to need to make removeable ports to be exact...just stuffing something in there is not a good idea.

How would I go about doing that?

 

[Chevyaudio 5,000+ posts]

You would have a box with a rectangular hole it it. And two "stand alone ports" That would bolt into the box. Like said above both ports would be about the same length, but the lower tuned port would have less port area. Just search removeable ports, and you should see some threads.

 

[ruger 10+ year member]

might be a cool idea.

get a powerfull 2 channel amp for your subs left channel is a cetian freq

and right is another.

another way is to make a box with 4 areo ports tuned high

then plug them if you want to tune lower.

somthing like this 3cu. 4, 4" ports at 13" long flared

outside of the box tuned to.

4 open ports 55hz

1 sealed port 47hz

2 sealed ports39hz

3 sealed ports 28hz