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Small center using leftovers

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  • Small center using leftovers

    I currently don't have a center channel speaker, and for the most part I don't really need one for most content. I do have the urge to build something easy, so, I'm going to modify an old speaker box, and make a small 2-way. The drivers have been collecting dust for many years. The tweeter will most likely be a Morel mdt39. The woofer will be a Peerless 4" HDS. My woodworking skills are minimal, but I hope to make the box look a little better than it looks now. I'll add a before picture when I get a chance. This new speaker may later become a 3-way by adding a woofer in a separate box.

  • #2
    Free/near free is usually good, especially when you don't need to scratch build a cabinet.

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    • #3
      Ooooo a custom design!!
      Click image for larger version

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      Constructions: Dayton+SB 2-Way v1 | Dayton+SB 2-Way v2 | Fabios (SB Monitors)
      Refurbs: KLH 2 | Rega Ela Mk1

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      • #4
        Click image for larger version

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ID:	1472850 Existing speaker.

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        • djg
          djg commented
          Editing a comment
          Those may be "before" pics, but they're definitely "after" something.

        • rpb
          rpb commented
          Editing a comment
          I suspect that box has been part of 4 or 5 previous speakers dating back maybe 15 years. It would probably be easier to just start over, unless I stick with a pretty conventional baffle.

        • djg
          djg commented
          Editing a comment
          Duratex would fix it right up. It looks solid.

      • #5
        OK... time to start cutting! That's a Peerless 6.5" HDS driver, and a CSS LD22 tweeter. They will be used later in a larger box.

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        • #6
          Some drivers on hand.
          Click image for larger version

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          • #7
            I have the urge to slope the baffle, and carve some large round-overs. That was not initially my intention, but holding the 4" woofer up to the baffle, it just looks lost. I didn't have significant diffraction problems with the 6.5" woofer, but I'm thinking the 4" might be affected by the baffle more. If I cross low, that might not be an issue. I might make a simple baffle, and measure the woofer before I do anything fancy. These 4" woofers are pretty smooth, or will be, if diffraction doesn't change it. https://www.parts-express.com/pedocs...spec-sheet.pdf

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            • #8
              To djg.....This box has been around. It was altered to play with this one. This one was a new build about a year or so ago..


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              • djg
                djg commented
                Editing a comment
                It looks like a nice sized speaker. I have some Peerless/Vifa sealed 2 ways that are very handy.

              • rpb
                rpb commented
                Editing a comment
                I like the look of small speakers, but I want the performance of larger ones. These were fine with a sub, and "OK" without, but a little thin in the bass. The box is too small to go deep. My plan is to build larger 2-ways for my living room that can handle the bass without a sub. I've built some already, but they look really bulky because they are 1 cu-ft and sit on 24" stands. .

            • #9
              :D

              Keep going, rpb!!

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              • #10
                I should show you guys my ugly speakers!

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                • #11
                  Don't make me share my ugly drumming studio pics!!

                  :D

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                  • #12
                    I used the diffraction simulator to see if I could find a good location for the woofer and tweeter. The seats in my room are at about 20 degrees off axis, so that's what is shown in the sim. I will probably have large beveled edges, but I ran a sim with and without. Vertical response looked pretty good up to 25 degrees or so.

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                    • #13
                      Just visualizing before I cut for drivers. Might use the larger tweeter.

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                      Click image for larger version

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                      • #14
                        I think I'm sticking with the smaller mdt39. I want to bevel the top, and There's not enough room unless I lower the woofer.
                        Last edited by rpb; 07-10-2021, 06:23 PM.

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                        • #15
                          Click image for larger version  Name:	20210711_120521.jpg Views:	0 Size:	823.0 KB ID:	1472950 Baffle is coming along. After it's glued in place, I will make additional passes on the table saw to even it up.

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