1. ## my box?

Hey guys I need to find out my cubic feet. And what it is tuned to. Subs displacement is .15 I have two so .30. The box is 32w 14.5h 21.5d with port 2w 13h 18d. Thanks

2. ## Re: my box?

Box volume after subwoofer displacement is 4.28 cubes.
And with the calculator I used, I figured you're tuned to around 26.5 hz which is a very low tuning. Not sure if it was accurate with the calculators I used...

Box Volume = Subwoofer Enclosure Calculators, Fraction to Decimal, Parallel, Series, Port Length and Volume Calculators

Port Tuning = Port Length Calculator
And I just kept typing in different frequencies until it said a port length of 18.1 which is right at 26.5hz. This number seems low as hell and I might have just put something in wrong, lol.

3. ## Re: my box?

Your box is 3.89 tuning I haven't messed with yet but probably a little higher tuning than you thought

4. ## Re: my box?

Originally Posted by dbeez
Your box is 3.89 tuning I haven't messed with yet but probably a little higher tuning than you thought
Ya I got 3.78 after displacement of subs and port. Tuned at 28.88hz.
Its a box that I got with my skar audio subs. Its supposed to be tuned to 32hz. And I would think it should be at 4 cubic feet.
if I cut my port back so its at 32hz would that help with the higher bass?

5. ## Re: my box?

If I cut it back to 12.25 I should be at 32.82hz. And 3.95ft right?

6. ## Re: my box?

make a new box. you only have 26 sq" port area. you should have about 14-16 sq in per cu ft. thereby a a 4 cube box should have around 60 sq inch of port area- so a 15" x 4" slot would work much better, also the port would get longer the more area it is.

7. ## Re: my box?

That box is as said above basically junk trash it and build a new better one or have one of us builders build you an accurate box.

8. ## Re: my box?

Originally Posted by dbeez
That box is as said above basically junk trash it and build a new better one or have one of us builders build you an accurate box.
I can build one I just need help with the design.

9. ## Re: my box?

@pro-rabbit or any of the other box guys will sell you plans for around 15 bucks.

10. ## Re: my box?

I got 3.91 cuft tuned to 27.78 hz. Port area is extremely small at 6.65" / ft

11. ## Re: my box?

Can someone check this for me? Box for two vvx 12. 37w 17h 21d
port 4w 15.5h 32d. Port in the middle of the subs. 45 in port. I got 32.64hz and after all displacement 4.07cuft. 62.0in port area.

12. ## Re: my box?

Someone? Is that right?

Bump

14. ## Re: my box?

Originally Posted by SMS
make a new box. you only have 26 sq" port area. you should have about 14-16 sq in per cu ft. thereby a a 4 cube box should have around 60 sq inch of port area- so a 15" x 4" slot would work much better, also the port would get longer the more area it is.
What should the port area be for round ports?

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