4th order

[xjkeith 10+ year member]

how do do you find out the volumes for a 4th order box.

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[Buck 5,000+ posts]

Algebra

 

[Buck 5,000+ posts]

Oh you mean how big each side is supposed to be?

 

[randy8876 10+ year member]

I asked the similar question before..... and got the same answer as you (nothing).

I used numerous box calculators available. From downloaded ones to cheesy online ones. Eventually you'll see similar numbers coming up, and I'd bet those numbers will be fairly accurate.

 

[winkychevelle 10+ year member]

The Subwoofer DIY Page - 4th Order Bandpass Systems: Box Calculations

Only thing they for got to tell you to multiply the volumes of the chambers by ten

It just alot of math and you have to add in you displacements

 

[randy8876 10+ year member]

You can also use:

http://www.carstereo.com/help/Articles.cfm?id=27

Or WinISD.

 

[winkychevelle 10+ year member]

You can also use:Bandpass Subwoofer Box Design (Fourth-Order)

Or WinISD.

thats not as reliably as taking the math route of it but i did check it and the volumes match for the chambers but the other numbers are off a hair but it's really close

and i havent tried winisd yet but ill check it and let yall know

 

[Linkz 10+ year member]

I made a spreadsheet with those calculations. Looks like it could be useful.

The values in there now are for a sdc2.5 15".

4th order calculation.zip

Let me know if there are any errors.