2002 Suburban with Alpine Type R’s
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=87005
Printed Date: October 31, 2025 at 1:03 PM
Topic: 2002 Suburban with Alpine Type R’s
Posted By: suburban boy
Subject: 2002 Suburban with Alpine Type R’s
Date Posted: December 11, 2006 at 3:56 AM
Hey guys iam new around here and got some Questions....I have a 2002 suburban iam going with two wedge style boxes facing each other with (2) 12" type-r's and need a little help. the box size is going to be 23x15x20 (WxHxL) which would give me 1.5 interior volume and a 2 inch vent about 3.5 inchs long tuned to 35hz...How does this sound? any ideas? and were would be the ideal spot to place the port?
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Suburban boy
Replies:
Posted By: jeffchilcott
Date Posted: December 11, 2006 at 11:29 AM
ny my calcualtions that comes to about 3.11 cu ft internal.
what are the total demensions on your port? 2x3.5xwhat?
3.5 inches is really really short, and may tune the box very high
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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: suburban boy
Date Posted: December 11, 2006 at 11:43 AM
hey, even when i did the box calculation here the box gave 1.5 and when i used the port lenght calculator it gave me about 3.5 inches long...can you tell me if iam doing somthing wrong with the calculations? And what would you recommend, Thanks
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Suburban boy
Posted By: jeffchilcott
Date Posted: December 11, 2006 at 12:46 PM
your box is 23x15x20
internal would be 21.5x13.5x18.5=5369.625
5369.625/1728=approx 3.11cu ft
Are you going to use a round port or square vent?
The Calc if you put in your external demensions and .75 for 3/4 MDF then it comes right to 3.1
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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: suburban boy
Date Posted: December 12, 2006 at 3:28 AM
its gonna be round abs port, so i guess 3.11 is what i should shoot for, thanks and how woudl i calculate port length?
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Suburban boy
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