Announcement

Collapse
No announcement yet.

U-Baffle conciderations

Collapse
X
  • Filter
  • Time
  • Show
Clear All
new posts

  • U-Baffle conciderations

    Hi,
    I am doing a homage build that will require a u-baffle/tunnel behind the mid-range. I am fairly sure it needs to be treated like a OB with a REALLY thick baffle, but my knowledge ends there. I understand the concepts of OB/ U-baffle, but this will be my first ground-up design of one. ,

    Let's say the Woofer will be of a 10-12" variety, the mid 3-4" variety, and tweeter a 3/4" dome. Without stating specific of woofer/mid/tweet combo, what are the general considerations those who have has OB success (sans DSP) of such a design?

    My attempt with this thread is to start broad and narrow the design down as discussion marches on. Yes - U-baffles are less than ideal, but it is a requirement of the design so changing it is not an option. The Statement series sounds pretty darn good, so I know it can be done! Thanks!

    .

  • #2
    U-baffles do suffer from standing waves so just be ready.
    R = h/(2*pi*m*c) and don't you forget it! || Periodic Table as redrawn by Marshall Freerks and Ignatius Schumacher || King Crimson Radio

    Byzantium Project & Build Thread || MiniByzy Build Thread || 3 x Peerless 850439 HDS 3-way || 8" 2-way - RS28A/B&C8BG51


    95% of Climate Models Agree: The Observations Must be Wrong

    Comment


    • #3
      Good luck! A lot theory, but little practical examples.
      Kenny

      http://www.diy-ny.com/
      DIY NY/NJ 2014 https://www.youtube.com/watch?v=FGwA...ature=youtu.be
      Man does not live by measurements alone, a little music helps.

      Comment


      • #4
        Originally posted by Pete Schumacher View Post
        U-baffles do suffer from standing waves so just be ready.
        Thanks Pete, I am actually going to use a 4" diameter cardboard tube that is a little thicker than 3/8". It is inherently more dampened than PVC, or a wood tunnel. I am also going to stuff it a bit.

        I am hoping that will help...
        .

        Comment


        • #5
          John K's excellent web site--Music and Design--has studies of open baffle speakers with theory and simulation/measurement results. Just read a bit and you will be learn about u-baffles and more.

          www.musicanddesign.com/

          Comment


          • #6
            Originally posted by Jim Griffin View Post
            John K's excellent web site--Music and Design--has studies of open baffle speakers with theory and simulation/measurement results. Just read a bit and you will be learn about u-baffles and more.

            www.musicanddesign.com/
            You know Jim,
            This should have been an obvious place for me to look. I have met John a couplenof times at DIY NE and he is a real gift to us. His work on crossovers and polar patterns is a priceless, real-world study.

            Thanks a bunch!
            .

            Comment


            • #7
              This might help (maybe not) http://www.quarter-wave.com/OBs/U_and_H_Frames.pdf
              Sausage With Meat Sause, Please

              Comment


              • #8
                Horn Response can model this. Typically you would want to avoid the cavity resonance as it's difficult to remove.
                John H

                SLS-85, BMR-3L, Mini-TL, BR-2, Titan OB, B452, Udique, Vultus, Latus1, Seriatim, Aperivox,Pencil Tower

                Comment


                • #9
                  Originally posted by jhollander View Post
                  Horn Response can model this. Typically you would want to avoid the cavity resonance as it's difficult to remove.
                  I think I am going to have to dampen the cavity resonance. It is right in the pass-band of the mid(1750 ish. A saving grace is going to be step compensation will be pretty much on the midrange if I choose to cross high, but not out of the 4pi raidiation of the woofer. This will be around 800Hz or so with a 16" wide front baffle.
                  .

                  Comment

                  Working...
                  X