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MLTL floostander vs. vented bookshelf

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  • MLTL floostander vs. vented bookshelf

    Hi!
    What are the advantages of a MLTL design over a vented bookshelf
    with the same driver (Vifa P17WJ00).
    I'm asking that because I 'm going to build a pair with these drivers.
    but a friend of mine told me that the bookshelf is the way to go.
    I like better floorstanders and think the vifa's will perform very well in
    a MLTL cabinet
    By the way Paul K. calculated the frecuency response with a web design
    and it looks pretty well.
    Thanks in adcanced.

  • #2
    Re: MLTL floostander vs. vented bookshelf

    If you prefer the bookshelf form factor, you can still build the same ML-TL as I modeled, but in a more compact height, simply by folding the line once. What you'd essentially be doing is make the internal height half as tall and doubling the depth (plus the thickness of the internal divider that folds the line).
    Paul

    Originally posted by abn1701 View Post
    Hi!
    What are the advantages of a MLTL design over a vented bookshelf
    with the same driver (Vifa P17WJ00).
    I'm asking that because I 'm going to build a pair with these drivers.
    but a friend of mine told me that the bookshelf is the way to go.
    I like better floorstanders and think the vifa's will perform very well in
    a MLTL cabinet
    By the way Paul K. calculated the frecuency response with a web design
    and it looks pretty well.
    Thanks in adcanced.

    Comment


    • #3
      Re: MLTL floostander vs. vented bookshelf

      Do share the design?

      Comment


      • #4
        Re: MLTL floostander vs. vented bookshelf

        Originally posted by abn1701 View Post
        Hi!
        What are the advantages of a MLTL design over a vented bookshelf
        with the same driver (Vifa P17WJ00).
        I'm asking that because I 'm going to build a pair with these drivers.
        but a friend of mine told me that the bookshelf is the way to go.
        I like better floorstanders and think the vifa's will perform very well in
        a MLTL cabinet
        By the way Paul K. calculated the frecuency response with a web design
        and it looks pretty well.
        Thanks in adcanced.
        Offhand, I can't think of a single advantage of a vented over a MLTL other than the vented enclosure may model smaller in size.

        I'd go with Paul's design. I'm sure you won't be disappointed.

        C
        Curt's Speaker Design Works

        "It is the mark of an educated mind to be able to entertain a thought without accepting it."
        - Aristotle

        Comment


        • #5
          Re: MLTL floostander vs. vented bookshelf

          The original design was described in abn1701's thread titled, "MLTL for Vifa P17WJ help". It was a floor-standing MLTL that someone else designed. I modeled it to answer a question from abn1701 on how much stuffing. That said, if I were building an ML-TL for this Vifa driver, I'd make it taller than the ~30" internal height as originally modeled so that a tweeter located above this Vifa would be at ~ear height. I'd make the internal height be 38" with an internal width of 7" and an internal depth of 6.5". I'd locate the Vifa's center 8" below (internally) the top, and I'd locate the center of the mass-loading port 3" above (internally) the bottom, using a port with a diameter of 2.5" and a length of 4.25". I'd use a stuffing density of 0.75 lb/cu.ft., resulting in a total of 6 ounces of stuffing, uniformly distributed by density in the top (internally) 19" of the cabinet (the top half). Doing so would result in the system response (red line) shown in the attached graph. And, thanks to Curt C. for his nice comment.
          Paul

          Originally posted by ClosetSciFiGeek View Post
          Do share the design?
          Attached Files

          Comment


          • #6
            Re: MLTL floostander vs. vented bookshelf

            Originally posted by Paul K. View Post
            I'd make the internal height be 38" with an internal width of 7" and an internal depth of 6.5". I'd locate the Vifa's center 8" below (internally) the top, and I'd locate the center of the mass-loading port 3" above (internally) the bottom, using a port with a diameter of 2.5" and a length of 4.25". I'd use a stuffing density of 0.75 lb/cu.ft., resulting in a total of 6 ounces of stuffing, uniformly distributed by density in the top (internally) 19" of the cabinet (the top half).
            Paul
            -If Vifa wanted a big hit in the DIY market, they would start producing the P17 again...

            Now that sounds and models like a nicely turned out TL. Paul, as usual, is quite generous with his time and expertize. -But then you all knew that already...

            C
            Curt's Speaker Design Works

            "It is the mark of an educated mind to be able to entertain a thought without accepting it."
            - Aristotle

            Comment

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