single chamber box with 2 subs. How to calculate the port length?

[bigblackdodge]

Ok so heres my situation, i have 2 new alpine type r 10's and have built a box with a little better than 2.75^3 gross and should end up with about 2.5 after the 2 10's displacement. But how do i calculate the port size for 2 subs in a single box? EX. 12v.com slot port length calculator says---> 2"wide X 6"high = 9.77" long Box being 2.5^3 and tuned to 32hz. Would the 9.77" long port be the same for using both subs inside the same chamber/box or would i need to double my port's volume? Do you understand what im asking? help please.

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[bigblackdodge]

Would an aero port be better? What size for my 2.5'3 box with the 2 10's and tune for 32hz. I have up to 8" diameter and can go 8" deep for my port. If you have one for for sell I'll buy it....

 

[bigblackdodge]

Bumpity

 

[Kelvartis]

the 1 port should be fine as long as you aren't getting too much port speed / noise.

 

[bigblackdodge]

Ok well I went with 4" PVC pipe. 8.5" long for a 33-34hz tune. I rounded out and beveled the interior walls of the pipe both ends and made as support to hold the pipe in place so the wind won't move it. Once I get an amp to power my setup I will post my results to help other rookie box builders.

 

[LosIsATool 5,000+ posts]

You will want two 4 inches with that much volume.