OpenTube

How to Design Transmission Line Subwoofer Enclosure

CarAudioFabrication

381,388 views

Ever wonder How to Design a Transmission Line or " T-Line " Subwoofer Box Enclosure ? A transmission line is known for it low bass frequency response and flat accurate response, but is it ideal for custom car audio? After all there are many other choices like ported, sealed, fourth order bandpass, sixth order bandpass and more....

Enjoy the content? Subscribe!
⬇️ Want more? ⬇️
✅Car Audio Tutorial Library - https://www.caraudiofabrication.com/l...
✅ Box Designs - I help you build your own box! - https://www.caraudiofabrication.com/b...

Here at Car Audio Fabrication I teach you how to Master Car Audio in an effort to Design, Build, and Install your ideal car audio system. Whether you are a hardcore basshead or a HiFi focused audiophile I would love to have you subscribe and join our community!

Website: https://www.caraudiofabrication.com/
Facebook: caraudiofabrication
Instagram: caraudiofab
TikTok: caraudiofab

Music:
Switch It Up - YouTube Audio Library
Dark Lotus Sting - YouTube Audio Library

Use of information from this video is at your own risk. You MUST view the full disclaimer here: https://www.caraudiofabrication.com/d...

Car Audio Fabrication – Master Car Audio – Design, Build, Install

20 Comments

@CarAudioFabrication Creator 9 years ago Pinned

Who's ready to see the build video? Let's see if we can get this video to 1,000 likes for the next video to be released! Thanks for watching! - Mark

@christianmontero808 1 year ago

This will be the only time you will ever be serious in math.

@supreemproductions 8 years ago

My passion for building enclosures using mathematics is the only reason why I graduated college. My classmates always griped about how “boring” math is, but when they came to me to build an enclosure, they finally understood a real-world application that affected them directly.

@rock3rd 2 years ago

Dog food demo was so on point, couldn’t explain any better great video

@TimoBirnschein 4 years ago

I love the dog food graphics! Amazing :D

@Tim_of_all_trades 3 years ago

Great video! As a ham radio operator, the concept of a transmission line box for audio really resonates with me. Thank you for making it easy to understand!

@operationsusfoods1354 4 years ago

5:43 the 9 is because he is using an 8 inch subwoofer

@mattb9664 9 years ago (edited)

Mark's onscreen voice is maturing.

@blaube 8 years ago

I had already known much of this because I have been studying this subject since the 90's. But this was the best simplified explanation of TLine vs ported boxes I have heard to date. Well done.

@omark2423 1 year ago

Great advice as always.

@felixokeefe 9 years ago (edited)

In some more advanced TL theory is stated that the speed of sound is slowed when passing through fibrous material such as poly-fill. This reduction in speed is dependant upon the sound frequency in question. It involves some extra math. However with proper stuffing it is possible to build a much smaller (read shorter line) TL subwoofer cabinet.

@tonyfoxxbuilds1920 8 months ago

0:45 "at first glance" you're router table/ cabinet door on/off switch is gah dang genius.... subscribed

@wadehensley5005 9 years ago

The first time i ever saw the bose wave radio ad in a magazine showing the port layout inside ive been wondering how it would work in a vehicle. thank you so much for making this video and explaining the pros and cons. Much appreciated man!

@DelpsDayOff 1 year ago

Thanks for the video, i was just about to build a T-line and looking all over at examples this was the only layout that fits the shape of the space i needed it for, i dont know crap about the math behind these.. i just put one together with a dayton audio nd105-4-4 and will be posting a video soon. Thanks again

@FaraiThePropertyGuy 9 years ago

The dog is called "Hertz"

Insert jokes and puns here...

@advanced8526 1 year ago

Dude I am in the middle between work designing a t line enclosure for my old rockford fosgate punch hx2 sub for my 45+- x 45+- garage. Ai simulation and specs equate to box being 62.5" tall and 19.5"wide and 15.5" deep. I love it. Cant wait to get it going in reality.
Thanks for this video it helps alot

@paolozak3014 6 years ago

The dog food explanation ! ...perfect 😎

@merwynvincent 6 years ago (edited)

we were talking abt science and maths..... and suddenly u decided to do some magic 8:45 !!!!!!!!!!!!

@mikestutt 8 years ago

Genuinely one of, if not the most useful video I have ever seen on YouTube. How did I not find this channel earlier! Always wanted to know how Bose get so much bass from a small speaker and this pretty much sums it up. Top man! 👍🏼

@lunchie80 7 years ago

This is a very simple TL box. The woofer is at one end meaning the peaks and dips are pretty big. Moving the sub down the line can help smooth the response quite a bit. You can also taper the line(bigger at one end) and also play with damping at various points in the line.

This is a good explanation but there are many more variables that can be tuned in a TL.