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My two-way Vifa towers are coming along... *PIC*

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  • My two-way Vifa towers are coming along... *PIC*



    Provided Link: Vifa Tower Project


    Using some Vifa D27TG-45 tweeters and Vifa PL21WO-39 woofers that I've had sitting around way too long for my first from-scratch crossover design. I have to say I'm quite pleased with the results so far. I can certainly hear the coloration of the poly woofer, but I haven't found it offensive yet. It's almost like the sound of an old Marantz receiver. This is a very warm and relaxed speaker, perhaps lacking in impact, but not lacking in detail or bass.

    I'll post more details as things progress. And since this is my first shot at design, I would certainly appreciate any suggestions.

    Geoff K.


  • #2
    Re: My two-way Vifa towers are coming along...


    Very nice indeed... I especially like the driver placement. Having the woofer higher on the baffle allows excellent internal damping. I'm working with a poly driver in my first design, and they do have a certain coloration that reminds me of [vintage] Denon, Sony JFET amps, Luxman, and -Marantz-............Great job!

    GC

    > Using some Vifa D27TG-45 tweeters and Vifa
    > PL21WO-39 woofers that I've had sitting
    > around way too long for my first
    > from-scratch crossover design. I have to say
    > I'm quite pleased with the results so far. I
    > can certainly hear the coloration of the
    > poly woofer, but I haven't found it
    > offensive yet. It's almost like the sound of
    > an old Marantz receiver. This is a very warm
    > and relaxed speaker, perhaps lacking in
    > impact, but not lacking in detail or bass.

    > I'll post more details as things progress.
    > And since this is my first shot at design, I
    > would certainly appreciate any suggestions.

    > Geoff K.

    "HiFi doesn't come in bits and pieces"
    Economic Socialism is the liberty of owner/operated businesses that Princes of forced capitalism fear most.

    Comment


    • #3
      Re: My two-way Vifa towers are coming along...


      Look good!,I see you couldnt wait for the glue to dry before mounting the speakers!I did that once and ran them,the speakers pressure pushed the glue out and I had leaks everywhere, also,get rid of those slotted screws!anyway you will like that tweeter,I have used those and they really sound nice,Nice work! A.H.
      http://smg.photobucket.com/albums/v655/aaronhero/
      http://groups.msn.com/aaronsspeakers/pictures
      [email protected]

      Comment


      • #4
        Re: My two-way Vifa towers are coming along...


        Thanks!

        Actually, the glue had dried overnight (I made that mistake once before), I just hadn't cleaned it up at all. I used a different brand of glue, it's a little more watery and I'm not sure I like it. The screws are junk, just to hold things in place for this first listening. Besides, they are way too shiny.

        That reminds me of a question I had. On the inside of the woofer cutout, should I use a 1/2 inch roundover or a 45 degree chamfer to open things up? Is there any difference, other than the roundover leaving me more material for my screws to bite into?

        Geoff K.

        Comment


        • #5
          Re: My two-way Vifa towers are coming along...


          I've seen alot of guys chamfer most of it away except where the screws mount,I've seen pics of this here,maybe someone knows where to find them.I dont know how much difference it will make with a 3/4" baffle but it can't hurt!

          A.H.


          http://smg.photobucket.com/albums/v655/aaronhero/
          http://groups.msn.com/aaronsspeakers/pictures
          [email protected]

          Comment


          • #6
            Re: My two-way Vifa towers are coming along... *PIC*




            > Thanks!

            > Actually, the glue had dried overnight (I
            > made that mistake once before), I just
            > hadn't cleaned it up at all. I used a
            > different brand of glue, it's a little more
            > watery and I'm not sure I like it. The
            > screws are junk, just to hold things in
            > place for this first listening. Besides,
            > they are way too shiny.

            > That reminds me of a question I had. On the
            > inside of the woofer cutout, should I use a
            > 1/2 inch roundover or a 45 degree chamfer to
            > open things up? Is there any difference,
            > other than the roundover leaving me more
            > material for my screws to bite into?

            > Geoff K.

            Geoff, either one would work...I used a 1/2" round-over for the relief in the pic, with a 3/4" baffle. I installed the inserts and then carefully routed between them. I do this on all woofer mounting holes. Nice work! What XO did you come up with?

            John A.

            "Children play with b-a-l-l-s and sticks, men race, and real men race motorcycles"-John Surtees
            Emotiva UPA-2, USP-1, ERC-1 CD
            Yamaha KX-390 HX-Pro
            Pioneer TX-9500 II
            Yamaha YP-211 w/Grado GF3E+
            Statement Monitors
            Vintage system: Yamaha CR-420, Technics SL-PG100, Pioneer CT-F8282, Akai X-1800, Morel(T)/Vifa(W) DIY 2-way in .5 ft3
            Photos: http://custom.smugmug.com/Electronic...#4114714_cGTBx
            Blogs: http://techtalk.parts-express.com/blog.php?u=2003

            Comment


            • #7
              Re: My two-way Vifa towers are coming along... *PIC*



              Provided Link: Vifa Towers


              > Geoff, either one would work...I used a
              > 1/2" round-over for the relief in the
              > pic, with a 3/4" baffle. I installed
              > the inserts and then carefully routed
              > between them. I do this on all woofer
              > mounting holes. Nice work! What XO did you
              > come up with?

              > John A.

              Here's the XO. A simple first order and zobel on the woofer and a 2nd order LR and pad on the tweeter making for a crossover point around 1900Hz. Not that I really understand what I'm looking at, but the phase looked ok, the reverse-null looked good and the impedance barely dipped under 8 ohms. From what I've been told I'm really stretching the range of that woofer, but other folks seem to like these Vifas in extended range applications.

              Comment

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