Should I port this?

Printed From: the12volt.com
Forum Name: Car Audio
Forum Discription: Car Stereos, Amplifiers, Crossovers, Processors, Speakers, Subwoofers, etc.
URL: https://www.the12volt.com/installbay/forum_posts.asp?tid=87464
Printed Date: May 12, 2025 at 2:13 PM

Topic: Should I port this?

Posted By: John64
Subject: Should I port this?
Date Posted: December 19, 2006 at 7:26 AM

Hey guys, I just finished a nice sealed enclosure for my Alpine SWR 1521D, I have it wired to 4 ohms on my Alpine MRV 1507 (bridged). The enclosure turned out to be around 2.8 cubes after all displacement. It sounds real nice, but I would love to see what it can do ported. What would your recommendations be for port size and length? I would like to do 2 ports. The sub is facing the rear, but the ports would have to face the passengers. Your input is welcome.

Sub specs are:
Fs:23hz
Vas:98L
Qms:9.84
Qes:.4
Qts:.38
X max:16.5mm
X peak: 33mm

posted_image

Replies:

Posted By: John64
Date Posted: December 19, 2006 at 7:40 AM

Sorry, pasted wrong item in.^^^^^^^^^^^^^^^^^^^^^^^

Posted By: jeffchilcott
Date Posted: December 19, 2006 at 9:23 AM

If you were going to port the box, I would say have it fire up alone with the woofer. Thats one powerful amp you have there, but carful not to over drive the sub!

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2009 0-1000 Trunk WR 154.0DB 2009 1001+ Trunk WR
2007 USACI World Champion
2007 World Record
2006 USACI Finals 2nd Place

Posted By: mike12volt
Date Posted: December 20, 2006 at 9:12 PM

Alpine One of these subs would have the specs. you need. Those are just a newer version of the one you have.