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Pretty Persuasions - InDIY Coax Build Thread

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  • Pretty Persuasions - InDIY Coax Build Thread

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    Javad Shadzi
    Bay Area, CA

    2-Channel Stereo system in the works with Adcom components and 4-way towers

  • #2
    Fabulous! Love the concept. I'm also very curious to hear your impressions of those MCM woofers.
    Co-conspirator in the development of the "CR Gnarly Fidelity Reduction Unit" - Registered Trademark, Patent Pending.

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    • #3
      Originally posted by tom_s View Post
      Fabulous! Love the concept. I'm also very curious to hear your impressions of those MCM woofers.
      Thanks for following along Tom! Yes will do, seems like a very nice unit at a rock bottom price.
      --
      Javad Shadzi
      Bay Area, CA

      2-Channel Stereo system in the works with Adcom components and 4-way towers

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      • #4
        Looking forward to more!
        See my projects on Instagram and Facebook

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        • #5
          Excellent - has been too long since a JavadS build thread!!! Thanks for sharing, looking forward to following along.

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          • #6
            Convinced me

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            • #7
              That is one cool looking kerf corner. Good luck with the glue up and finishing process.
              Plumber's Delight: http://techtalk.parts-express.com/fo...notech-winners
              Linehopper: http://techtalk.parts-express.com/sh...Esoteric-build
              Plan-Tanic: http://techtalk.parts-express.com/sh...ght=Plan-Tanic

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              • #8
                Last edited by JavadS; 12-31-2017, 05:22 PM.
                --
                Javad Shadzi
                Bay Area, CA

                2-Channel Stereo system in the works with Adcom components and 4-way towers

                Comment


                • #9
                  amazingly gorgeous build. nice job.

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                  • #10
                    Hey Javad,

                    Nice work so far, I enjoy watching your progress as you go along.

                    I have a question on the kerf cuts. I've done a few of these in the past and have had issues with what has since been called "Faceting," or flat spots (similar to the facets on a jewel) showing up on the areas which have not been cut. These are amplified when a glossy finish is applied.

                    I don't see any on your project, and was wondering how you avoided it? My father tells me of a "Kerfing" saw blade he saw a woodworker use when he was young.....which was tapered so that the tip of the blade was more narrow in width, getting thicker, farther away from the cutting edge... designed specifically for doing just this. I stopped using this technique for curves, so I never looked further into it.

                    I've done a few things with kerf cuts in MDF, and if you just bump one of those little strips of wood the MDF just flakes apart, basically making it no better in those areas than 1/16" MDF, which isn't going to be very strong as we know. I'm sure solid wood performs much better in that regard.

                    It seems to me that since you are using solid wood, you could do a light sanding to 'round' the curve to perfect anyway if there was any slight faceting going on. Now that I'm thinking about it, the fact that your curve is perpendicular to the grain is really giving it some resistance to keep the curve rounded and not crease on the corner of the cut. Trying to bend what looks like about 3/32's of an inch of poplar against the grain would probably be hard to do without cracking it if it were not for the fact that the 'backer' pieces are keeping things held together. Sorry, just thinking out loud here...

                    Also, It's nice that the construction adhesive you used actually provided enough strength to keep the "C" shape in tact without any other support. That's gotta give you a nice feeling that it's going to help strengthen things up.

                    Anyway, basically what I'm trying to say is.... it looks fantastic so far. I'm a big fan of using real wood, though I almost never do!

                    Happy new year!
                    TomZ
                    *Veneering curves, seams, using heat-lock iron on method *Trimming veneer & tips *Curved Sides glue-up video
                    *Part 2 *Gluing multiple curved laminations of HDF *Cello's Speaker Project Page

                    *Building the "Micro-B 2.1 Plate Amplifier -- Part 1 * Part 2 * Part 3 * Part 4 * * Part 5 'Review' * -- Assembly Instructions PDF

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                    • #11
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                      Javad Shadzi
                      Bay Area, CA

                      2-Channel Stereo system in the works with Adcom components and 4-way towers

                      Comment


                      • #12
                        Javad, I have never done kerfing, but plan to do so soon. Could you post the link to the online calculator you mentioned? Also, you mentioned you only used it to get into the right ballpark, how was it overall... Did it get you pretty close to where you needed to be or were your manual refinements pretty significant?

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                        • #13
                          Originally posted by a4eaudio View Post
                          Javad, I have never done kerfing, but plan to do so soon. Could you post the link to the online calculator you mentioned? Also, you mentioned you only used it to get into the right ballpark, how was it overall... Did it get you pretty close to where you needed to be or were your manual refinements pretty significant?
                          You bet see https://www.blocklayer.com/kerf-spacingeng.aspx
                          --
                          Javad Shadzi
                          Bay Area, CA

                          2-Channel Stereo system in the works with Adcom components and 4-way towers

                          Comment


                          • #14
                            Javad - excellent use of innovative techniques and writeup as usual.
                            I had to read about the midrange truncated trapeziod cuts several times, but I think I get it now.
                            The chop saw is just cutting a 45 degree angle as usual, but the board is positioned at an angle so
                            the miter on the slanted sides comes out perfectly. Complex stuff for my head!

                            I imagine it's like anything else, once you do it a few times it becomes clear. <g>

                            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!
                            SB13/Vifa BC25SC06 MTM DCR Galeons-SB13-MTM
                            My Voxel min sub Yet-another-Voxel-build

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                            • #15
                              Originally posted by JavadS View Post
                              Tom thanks for the comments and thoughts! You think like I do, sequentially from one issue to another as they relate to each other.

                              I think like this for weeks leading up to a project and all through it testing ideas in my head before I ever actually try them.

                              There is some Faceting but it’s very light and it is sandable, so Poplar is really an ideal material here and performed much better than plywood and MDF during my tests. MDF is very weak too when it’s thin (corners too) so I’d use it very carefully.

                              Yes I’’ve thought that a pointed blade would be amazing for kerfing but haven’t seen one on the market, a blade that formed an angle would be great as it would allow the kerfs to miter together which would also be stronger.

                              You’’ll notice the shape of this speaker closely resembles my Strafi speaker so this is another experiment in creating a speaker baffle with a generous roundover (3”” radius).

                              Thanks for the conversation Tom!
                              Javad
                              Javad, I'm a novice at serious woodworking. And being that, left on my own, I would have filled the kerfs with wood glue prior to bending into shape - well not completely and wiping up after the bend. As I'm sure you know, the glue joints on softer wood are stronger than the wood itself.

                              What do you think? Some got ya' as to why you shouldn't?

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