Ways to lower tuning?

[rangerboy101 10+ year member]

Any way to lower the tuning on my box? It's currently tuned to 35hz and I'd like it to be more around 30hz. Building a new box is not an option because I really don't want to spend $140 to build an identical box just to have it tuned lower. The box is just a simple slot-port designed by Buck. Thanks in advance.

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[groundpound4200 5,000+ posts]

you're going to have to make the port longer or shrink down the port area.

btw.. what do you want for the AQ in your sig?

 

[rangerboy101 10+ year member]

you're going to have to make the port longer or shrink down the port area.
btw.. what do you want for the AQ in your sig?

I need to update my sig. I sold it already haha sorry. What part of the port do I need to make longer? I'm a newb when it comes to tuning.

 

[surreal 10+ year member]

Per the SA15 specs they like pretty generous boxes.. Im guessing in the box you have it now there is premature rolloff which may be part of the problem.

 

[rangerboy101 10+ year member]

There's nothing wrong with the current box. I just wanted it to be tuned a little lower.

 

[Falcons 5,000+ posts]

There's nothing wrong with the current box. I just wanted it to be tuned a little lower.

dont mess with it if you like it now. its just gonna be a big pain in your ***

 

[Nut Hair Trick 10+ year member]

If he were to add mass inside the enclosure to lower the compression area, while maintaining the same port area, wouldnt this lower box tuning?

 

[bhsdriller 10+ year member]

yeah I think so...

take 2 boxes, one smaller then the other. With the exact same size/length port, the smaller box would be tuned lower?

 

[mast240 10+ year member]

yes, but it would also lower his final airspace, which might screw with things... you could always extend the port out of the box a lil... would have to know exact dimensions on everything to tell you how much tho

 

[rangerboy101 10+ year member]

So it can be done? lol

 

---------- Post added at 05:03 PM ---------- Previous post was at 05:02 PM ----------

 

I'll see if I still have the email from Buck with the pictures/deminsions of the box.

 

[mast240 10+ year member]

i wont say a definate yes... till i see the box... but most times, yes it can

 

[rangerboy101 10+ year member]

I just copied the email. I don't feel like opening up every picture to get dimensions.

This is a pic of the bracing:

1 dollar box designs :: tylercrim2sa-15sfrontbracing.png picture by jtbuck92 - Photobucket

bracing and port wall:

1 dollar box designs :: tylercrim1sa-15internalfront.png picture by jtbuck92 - Photobucket

sub mounting:

1 dollar box designs :: tylercrim1sa-15submounting.png picture by jtbuck92 - Photobucket

overall:

1 dollar box designs :: tylercrim1sa-15overall3d.png picture by jtbuck92 - Photobucket

 

[Nut Hair Trick 10+ year member]

Yeah...

OP, if you could take some MDF, the same height internally of your enclosure, and cut them into say 3 inch strips, you can add them til you get the tune you like. To be more precise, here's an online calculator to figure out how much airspace each section will take up.... Use the bracing calculator, just leave the cutouts at 0 value. It will give you your cubic inches for the added mass... enter you info at the top so you can get an idea how it will effect your enclosure.

Enclosure Volume Calculator (EVC)

 

[rangerboy101 10+ year member]

And just so everybody knows I'm not saying anything bad about Buck or his design. I just wish I would've had him design me a box with lower tuning.

 

[supermaxx123 10+ year member]

Making the internal space less with the same length port equals higher tuning. so either inverting the sub and/or making the port longer on the outside would work