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Aperivox, 2014 MWAF

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  • Aperivox, 2014 MWAF

    Aperivox (open voice)

    Attached is the write up for my all Dayton RS 3-way.

    This project uses shielded RS150S-8 mid and RS225S-8 woofer. I used those as that’s what I had available. To answer the question if you can use the non-shielded versions, I’d say they would be very close, but the tweeter padding resistors would need to be adjusted.

    The uniqueness of this design is the use of a high quality aluminum midrange driver open baffle.

    The Dayton RS225 is in a MLTL enclosure. The stuffing is .75 lb. per cubic foot Dacron or fiberglass. I used fiberglass contained inside a thin polyester quilt batting “pillow” shape. The box is ½ inch MDF with 45 degree mitered joints. The center box divider is ¾ inch MDF. The box is finished with sprayed Kona Coffee colored acrylic latex over shellac based primer. The top coat is sprayed satin water based polyurethane.

    The front baffle is glued up ¾ inch stock. The wood is Soft Maple, Walnut, and Cherry. The front of the baffle has a ½ inch round over. The back of the baffle has a ¼ inch round over. There is a routed wire way in the middle for speaker wires. Remember to plug the wire way/ hole when it enters the woofer box. The front baffle is lag bolted to the box. The finish is sprayed oil based satin polyurethane.

    The port is 2.75 inch cardboard tube. The front port has a ¾ inch round over.

    The feet are “furniture legs” from KE Hardware. The feet are mounted on angle blocks that are glued to the MDF sides

    The cross over is mounted on a separate board under the box.

    Judges comments we very favorable from MWAF

    A few people wanted to see the X-O BOM so I'm attaching.

    Let me know if you see any errors or omissions
    Attached Files
    Last edited by jhollander; 07-24-2014, 08:02 AM. Reason: Added BOM for the X-O
    John H

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

  • #2
    Re: Aperivox, 2014 MWAF

    Beautiful woodwork!

    Comment


    • #3
      Re: Aperivox, 2014 MWAF

      Great looking speakers John and a nice write up.
      Expensive caps need time to break in. More expensive caps take a long time. Cheap caps sound great right out of the box.

      Why I don't spray in first gear: http://s1138.photobucket.com/albums/...t=100_2585.mp4

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      • #4
        Re: Aperivox, 2014 MWAF

        Beautiful work, as always John.
        Don't listen to me - I have not sold any $150,000 speakers.

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        • #5
          Re: Aperivox, 2014 MWAF

          No doubt, John, nice wood work! I totally enjoyed them at the show.
          A mains
          The Ventures
          Open Invit8tions
          RSR
          Sound Troopers
          Acorns
          442
          DGBG's
          The Monuments

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          • #6
            Re: Aperivox, 2014 MWAF

            These speakers were truly impressive. I have them marked down in my listening notes as a solid 10 for craftsmanship, clarity, and imaging. Great job!
            Linehopper: http://techtalk.parts-express.com/sh...Esoteric-build
            Plan-Tanic: http://techtalk.parts-express.com/sh...ght=Plan-Tanic

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            • #7
              Re: Aperivox, 2014 MWAF

              Your PDF alone is worth the trip. Love your speaker.
              Kenny
              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.

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              • #8
                Re: Aperivox, 2014 MWAF

                I've updated the first post with the BOM for the x-o.

                Thanks for all the nice comments.
                John H

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

                Comment


                • #9
                  Re: Aperivox, 2014 MWAF

                  John. Do you think the baffle can be done in MDF and painted black or is the solid wood baffle a more sturdy base for the drivers............

                  Comment


                  • #10
                    Re: Aperivox, 2014 MWAF

                    MDF is fine. You could probably go down to 1 inch thick without any issues
                    John H

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

                    Comment


                    • #11
                      Re: Aperivox, 2014 MWAF

                      Here are some further drawing clarifications. The dimensions are now all inches, previously they were cm over inches. I also removed some extra lines that were confusing. Hope this helps.
                      Attached Files
                      John H

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

                      Comment


                      • #12
                        Re: Aperivox, 2014 MWAF

                        The design is a work art. Your attention to detail right down to the documentation staggering. I am really curious what the reponse or mid driver on the dipole baffle looked like if you ran
                        Any simulations on programs like EDGE to analyze the dipole peak or polar plots measuring with the actual baffle speaker response

                        Fred

                        Comment


                        • #13
                          Re: Aperivox, 2014 MWAF

                          Fred in the first post the Aperivox PDF has the measured response on page 3, page 6 has the ABC sim.
                          John H

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

                          Comment


                          • #14
                            Re: Aperivox, 2014 MWAF

                            Originally posted by jhollander View Post
                            Fred in the first post the Aperivox PDF has the measured response on page 3, page 6 has the ABC sim.
                            Originally posted by jhollander View Post
                            Fred in the first post the Aperivox PDF has the measured response on page 3, page 6 has the ABC sim.
                            Your documentation is first rate and better than most telecom documents that I have worked with and written. I am a little curious if you had considered a notch filter at 1KHz and expanding bandwidth of RS 150 operating dipole to maybe 350 to 2.5 or 3KHz. The tweeter cross over looks like it took at lot of finesse to get right. I hate this process am going to start offsetting drivers to get away with order high pass and second low pass for the tweeter and mid. Second to third networks seem twitchy for me to get to sound right. Your results here are in my top ten of beautifully finished all well thought out designs I half seen on the forum. Keep working on those dipoles so we have a dipole guru for us masochist who want to build them.

                            Fred

                            Comment


                            • #15
                              Re: Aperivox, 2014 MWAF

                              Beautiful, innovative and challenging design/build. Thanks for sharing.

                              I think I hear a difference - wow, it's amazing!" Ethan Winer: audio myths
                              "As God is my witness I'll never be without a good pair of speakers!" Scarlett O'Hara

                              High value, high quality RS150/TB28-537SH bookshelf - TARGAS NLA!
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                              My Voxel min sub Yet-another-Voxel-build

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