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  1. #1
    juanmgarza26's Avatar
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    t line enclosure

    I want to experiment with a t line, I have really no definite answer, perhaps there is none, I know it requires quite a bit of space for a properly designed t line, what exactly are the advantages of a t line?







  2. #2
    Jeffdachef's Avatar
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    Re: t line enclosure

    wide bandwidth and great efficiency... IF done right lol.




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    Re: t line enclosure

    I got a pair of rf p1's and I wanna see how these suckers will do in a t line with low power, I came across t lines and want to experiment with them




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    Re: t line enclosure

    like jeff said... really, really efficient and wide bandwidth. there's quite a few threads about t lines on diyma




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    Re: t line enclosure

    Another advantage of wave transmission lines is that they're super easy to calculate. Of course, that's offset by the difficulty in designing the box to fit in your vehicle but on balance, I think it's well worth the difficulty.

    They play well throughout the sub bass region and normally extend to about one octave below driver Fs before going -3dB... which is super low compared with the response of a conventional ported enclosure tuned in the low 30s.

    Drivers with a Qts above 7 and a Qes below 4 are best suited for them but any sub will perform its best in a t-line.

    Here are some resources on them:
    Transmission Line Speakers
    Quarter Wavelength Loudspeaker Design

    Here are a few I've built:
    JBL GTO 10 in Wave T-Line
    https://www.youtube.com/watch?v=FN-s4efefZo



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    Re: t line enclosure

    Quote Originally Posted by bbeljefe View Post
    Another advantage of wave transmission lines is that they're super easy to calculate. Of course, that's offset by the difficulty in designing the box to fit in your vehicle but on balance, I think it's well worth the difficulty.

    They play well throughout the sub bass region and normally extend to about one octave below driver Fs before going -3dB... which is super low compared with the response of a conventional ported enclosure tuned in the low 30s.

    Drivers with a Qts above 7 and a Qes below 4 are best suited for them but any sub will perform its best in a t-line.

    Here are some resources on them:
    Transmission Line Speakers
    Quarter Wavelength Loudspeaker Design

    Here are a few I've built:
    JBL GTO 10 in Wave T-Line
    https://www.youtube.com/watch?v=FN-s4efefZo
    I've always heard that T-lines usually will give you far and away the highest output, it's just a pain in the *** to build them lol




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    Re: t line enclosure

    Quote Originally Posted by UsAmpsFreak View Post
    I've always heard that T-lines usually will give you far and away the highest output, it's just a pain in the *** to build them lol
    Depends on what you mean by build. The actual build process is no more difficult than a properly constructed ported box but, designing them to fit in a vehicle can be a challenge, given that a line for a small sub with an Fs of 30Hz will be about 9' long.

    And calculating one can be done with a simple, garden variety calculator... no software needed.



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    Re: t line enclosure

    Wow the math is really not hard at all, dam a t line for a skar I have laying around would be quite a massive enclosure for one 12




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    Re: t line enclosure

    I wonder how long a t line for 4 8's would be... Brb gonna go try to figure this out lol



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    Re: t line enclosure

    Which 8 are we talkin here?




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    Re: t line enclosure

    Not sure yet, either sundown sa8, IA I series 8, or cadence s2w8.



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    Re: t line enclosure

    Divide 1120 by the fs of your choice of sub and divide that by 4
    (1128/fs)/4 and that will be the length of your t line




  13. #13
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    Re: t line enclosure

    Quote Originally Posted by juanmgarza26 View Post
    Divide 1120 by the fs of your choice of sub and divide that by 4
    (1128/fs)/4 and that will be the length of your t line
    I'm getting 8.09 feet, would it make a difference with 4 subs over 1?



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    Re: t line enclosure

    Quote Originally Posted by jrdnhsnbrg View Post
    I'm getting 8.09 feet, would it make a difference with 4 subs over 1?
    No. The length stays the same. Your line volume will be x4. The length of the line has to do with the fs of the sub. The diameter of the line increases with more cone area




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    Re: t line enclosure

    can you sacrifice length for depth in any way? and i see the 8 inch type r has a T-line box alpine created for it..i heard amazing things of that type r in that box..




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