2 B2 IS10 box question

[Kris4b11]

For a while I had my eyes on B2 Audio and just loved the way their products looked. My new car is white so that just grabbed my attention even more. Right now im debating on going with 2 IS10's or 1 HN12, Does this box look ok for the 2 10s? I wanted to do a 6" octoport.

[Shenker]

Youre going to want to bring up that port area/ft to around 14 if you can. And you might want to bring that tuning up just a little bit, thats pretty low for a sub that has a rated Fs of 38, maybe bring it closer to around 36 if you can, changing port area might do that for you though. and also If im not mistaken I think octoports require different calculations? I dont know if they work the same as using a round port, Then again I could be mistaken on that. Other than that looks good!

[CleanSierra]

Port area per foot doesn't mean dick. Total port area is what you're after. For single 12 or 2 of those 10s, that should be plenty of port.

Round ports are different than octoports also, as mentioned. I've built a few octoport boxes and there is a good calculator for area here:

http://rechneronline.de/pi/octagon.php

That formula will give you cuts and angles as well, which is 22.5°.

As far as tuning preference goes, it's just that, preference. Just for a piece of mind, I measured the HN10 with my IM-SG and found the Fs to be different. It was closer to 34Hz.