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Alpine Type R Ported Box

Printed From: the12volt.com
Forum Name: Fiberglass, Fabrication, and Interiors
Forum Discription: Fiberglass Kick Panels, Subwoofer Enclosures, Plexiglas, Fabrics, Materials, Finishes, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=131355
Printed Date: May 02, 2025 at 10:40 AM


Topic: Alpine Type R Ported Box

Posted By: advanex
Subject: Alpine Type R Ported Box
Date Posted: May 05, 2012 at 10:05 AM

Alpine Type R 12" (Dual 4ohm)

The biggest dimensions I can fit in the space is 18" x 9" x 26". This is going in a boat, so I'm not sure what frequency to tune it to. I'm assuming a ported enclosure is the best option for a boat install? And I read that somewhere around 35-40hz would be optimal?

I used the RE Box Calculator, and it gave me a design, but I'm not sure where to cut in the subwoofer. Do I have to have an "L" shaped port? I also looked at the Digital Designs box, but it's a little to big. It has a straight port.

Any suggestions or links to readings would be appreciated.

Would a sealed box be out of the question?



Replies:

Posted By: advanex
Date Posted: May 07, 2012 at 8:29 PM
Well, I created my own with the help of the RE Box calculator. This is where I am currently

posted_image

Just trying to figure out if I want to invert the sub or not. The black box was the original box. It was roughly .91 cubic feet with 5 3/4" holes drilled in it, and a gaping hole where the cables came through the box. It was horrible, but hopefully I'll get it straightened out!


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