my box?

[Colossus281 10+ year member]

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

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[ryanthie 10+ year member]

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.

 

[dbeez 5,000+ posts]

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

 

[Colossus281 10+ year member]

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?

 

[Colossus281 10+ year member]

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

 

[SMS 10+ year member]

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.

 

[dbeez 5,000+ posts]

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.

 

[Colossus281 10+ year member]

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.

 

[DoesDad 10+ year member]

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

 

[Nut Hair Trick 10+ year member]

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

 

[Colossus281 10+ year member]

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.

 

[Colossus281 10+ year member]

Someone? Is that right?

 

[Colossus281 10+ year member]

Bump

 

[Colossus281 10+ year member]

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?