T-Line box for 2 8s

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=143638
Printed Date: May 11, 2025 at 11:55 PM

Topic: T-Line box for 2 8s

Posted By: bethington
Subject: T-Line box for 2 8s
Date Posted: October 18, 2017 at 8:02 PM

I'm wanting to put 2 8in cerwin vega vega 82.2 behind the seat of my nissan truck. It's small 24 tall, 48 wide, 6 deep bottom and 2 top. I have been beating myself head against the wall on this for some time. Any help would be greatly appreciate. I have a idea but it's on paper since I'm old school and still trying to learn sketchup. I have over 30 years of experience in sound. I have done this professionally in the 90s and even was the sound man for a rock band for awhile. I just haven't worked on designing a T-Line box until now. Tjanks

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Money buys everything but good sense.

Replies:

Posted By: bethington
Date Posted: October 18, 2017 at 8:11 PM

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Money buys everything but good sense.

Posted By: z03mz03m
Date Posted: October 27, 2017 at 9:20 PM

On youtube:

CarAudioFabrication
How to Design Transmission Line Subwoofer Enclosure
https://youtu.be/Q2VL_FHu9AY

I've wanted to design a TL Box for a long time...I'm interested to see what you make.
Have Fun! posted_image

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Dodge Magnum in progress:
Pioneer DEH-80PRS - PPI Amps - Dayton Subwoofer(s) - Exodus Anarchy's - Vifa Tweeters - Kinetik Battery

Posted By: bethington
Date Posted: October 30, 2017 at 4:05 PM

I have studied that video along with hours of others. I finally just put what I have learned along with advice from a very helpful person in the UK and built a test box out of some cheap wood. I haven't hooked it up in my truck yet but in my office it rattles the windows and sounded great. Tuned around 40 but I put it through the test and it still was shaking when I quit hearing it low 20s. I only had about half power on them but am very impressed. Hopefully I'll hook it up this weekend. Also my seat goes all the way back. In a 90 nissan pick up single cab that means a lot.
posted_image

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Money buys everything but good sense.

Posted By: z03mz03m
Date Posted: October 30, 2017 at 7:44 PM

That's awesome looking! posted_image

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Dodge Magnum in progress:
Pioneer DEH-80PRS - PPI Amps - Dayton Subwoofer(s) - Exodus Anarchy's - Vifa Tweeters - Kinetik Battery

Posted By: bethington
Date Posted: November 06, 2017 at 8:37 AM

I have tested the first build and it is amazing. So far I'm pleased with the output of this both SPL and SQ. 2 8s sounding like 10 or 12s. Frequency range is wide from low to mis 20s to my cutoff around 60.hip hop rock country and classical all sound good with little adjustments between them. I can't wait to do a final build.

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Money buys everything but good sense.

Posted By: bethington
Date Posted: November 06, 2017 at 11:57 AM

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Money buys everything but good sense.

Posted By: z03mz03m
Date Posted: November 07, 2017 at 8:34 PM

Right on!

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Dodge Magnum in progress:
Pioneer DEH-80PRS - PPI Amps - Dayton Subwoofer(s) - Exodus Anarchy's - Vifa Tweeters - Kinetik Battery