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InDIYana build - SuperNova Minimus

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  • #76
    So I had been taking a bit of a risk by assembling and testing only 1 of the speakers for crossover development. Today was the day to put the other one together and see if something was amiss.

    Luckily, all is good. The R speaker was put together and driven with the same crossover test parts. It actually measures flatter than the L by just a tick.

    I soldered leads to both sets of drivers in prep for the final crossover assembly this week. Now it's just waiting for my alternate full baffle step parts to arrive and test, then I should have about a week to listen to these things as a pair before InDIYana.
    Electronics engineer, woofer enthusiast, and musician.
    Wogg Music
    Published projects: PPA100 Bass Guitar Amp, ISO El-Cheapo Sub, Indy 8 2.1 powered sub, MicroSat, SuperNova Minimus

    Comment


    • #77
      Hmmm... I just glued uncut baffles on. You're doing better than me! =)

      I hope to be cutting holes later on this evening...

      Later,
      Wolf
      "Wolf, you shall now be known as "King of the Zip ties." -Pete00t
      "Wolf and speakers equivalent to Picasso and 'Blue'" -dantheman
      "He is a true ambassador for this forum and speaker DIY in general." -Ed Froste
      "We're all in this together, so keep your stick on the ice!" - Red Green aka Steve Smith

      *InDIYana event website*

      Photobucket pages:
      https://app.photobucket.com/u/wolf_teeth_speaker

      My blog/writeups/thoughts here at PE:
      http://techtalk.parts-express.com/blog.php?u=4102

      Comment


      • #78
        Originally posted by Wolf View Post
        Hmmm... I just glued uncut baffles on. You're doing better than me! =) I hope to be cutting holes later on this evening... Later, Wolf
        Holy crap man! Are you always last minute? ;)
        Electronics engineer, woofer enthusiast, and musician.
        Wogg Music
        Published projects: PPA100 Bass Guitar Amp, ISO El-Cheapo Sub, Indy 8 2.1 powered sub, MicroSat, SuperNova Minimus

        Comment


        • #79
          Not always. If you knew what I've been through in the last 2 months in terms of 'life', you might understand. FWIW, I knocked out the cabs in about 6 hours total. I've known the size and volumes and such for months, just have been unable to do the work. I only have to flush/round and cut holes in the baffles, as well as wire posts, and I'm ready for measurements. I have a large stockpile of parts, and drivers are on-hand. I likely won't have them finished for looks by then, but they will attend. If I hadn't done these, I would have nothing to bring, so I had to hurry...

          Later,
          Wolf
          "Wolf, you shall now be known as "King of the Zip ties." -Pete00t
          "Wolf and speakers equivalent to Picasso and 'Blue'" -dantheman
          "He is a true ambassador for this forum and speaker DIY in general." -Ed Froste
          "We're all in this together, so keep your stick on the ice!" - Red Green aka Steve Smith

          *InDIYana event website*

          Photobucket pages:
          https://app.photobucket.com/u/wolf_teeth_speaker

          My blog/writeups/thoughts here at PE:
          http://techtalk.parts-express.com/blog.php?u=4102

          Comment


          • #80
            Originally posted by Wolf View Post
            Not always. If you knew what I've been through in the last 2 months in terms of 'life', you might understand. FWIW, I knocked out the cabs in about 6 hours total. I've known the size and volumes and such for months, just have been unable to do the work. I only have to flush/round and cut holes in the baffles, as well as wire posts, and I'm ready for measurements. I have a large stockpile of parts, and drivers are on-hand. I likely won't have them finished for looks by then, but they will attend. If I hadn't done these, I would have nothing to bring, so I had to hurry... Later, Wolf
            Didn't mean to poke at a bad couple months.... but looking forward to hearing what you're cooking, even if it's naked!
            Electronics engineer, woofer enthusiast, and musician.
            Wogg Music
            Published projects: PPA100 Bass Guitar Amp, ISO El-Cheapo Sub, Indy 8 2.1 powered sub, MicroSat, SuperNova Minimus

            Comment


            • #81
              Got the parts for the more baffle step version today and had 15 minutes to clip in place and measure. The baffle step change is right, but I got some underdamped chebyshev filter sloping going on that exacerbated the midrange peak at 4k.

              I was trying to be cheap and make the same tweeter inductor work... bad idea. It has ended up measuring worse than the sim with the 4k peak staying put while everything else dropped 3dB.

              Now I gotta buy more inductors. This is where I need access to Wolf's parts bin ;)
              Electronics engineer, woofer enthusiast, and musician.
              Wogg Music
              Published projects: PPA100 Bass Guitar Amp, ISO El-Cheapo Sub, Indy 8 2.1 powered sub, MicroSat, SuperNova Minimus

              Comment


              • #82
                And- I can wind my own coils if I need to. That helps a lot!
                Wolf
                "Wolf, you shall now be known as "King of the Zip ties." -Pete00t
                "Wolf and speakers equivalent to Picasso and 'Blue'" -dantheman
                "He is a true ambassador for this forum and speaker DIY in general." -Ed Froste
                "We're all in this together, so keep your stick on the ice!" - Red Green aka Steve Smith

                *InDIYana event website*

                Photobucket pages:
                https://app.photobucket.com/u/wolf_teeth_speaker

                My blog/writeups/thoughts here at PE:
                http://techtalk.parts-express.com/blog.php?u=4102

                Comment


                • #83
                  Originally posted by Wolf View Post
                  And- I can wind my own coils if I need to. That helps a lot!
                  Wolf
                  Without totally derailing Wogg's build log - I would love to learn more about your coil winding ability! I'll pick your brain at InDIYana on that if you don't have something handy to share here.
                  Voxel Down Firing with Dayton SA70
                  Translam Subwoofers - The Jedi Mind Tricks
                  The Super Bees - Garage 2 way
                  SevenSixTwo - InDIYana 2018 Coax
                  The Defiants - InDIYana 2019 "Bare Minimum" Build

                  Comment


                  • #84
                    Replacement inductors in hand and tested. Looks good, the 4k lump is gone while holding the baffle step down. The key is to look at the 300Hz level, that should end up in the middle of the range for this system to end up flat as a whole.
                    Click image for larger version

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                    Now I got to figure out where this lands in the cabinet and put together the peg board versions.
                    Electronics engineer, woofer enthusiast, and musician.
                    Wogg Music
                    Published projects: PPA100 Bass Guitar Amp, ISO El-Cheapo Sub, Indy 8 2.1 powered sub, MicroSat, SuperNova Minimus

                    Comment


                    • #85
                      We believe in Wogg! Sent from my Pixel 2 XL using Tapatalk
                      Voxel Down Firing with Dayton SA70
                      Translam Subwoofers - The Jedi Mind Tricks
                      The Super Bees - Garage 2 way
                      SevenSixTwo - InDIYana 2018 Coax
                      The Defiants - InDIYana 2019 "Bare Minimum" Build

                      Comment


                      • #86
                        Originally posted by KEtheredge87 View Post
                        We believe in Wogg! Sent from my Pixel 2 XL using Tapatalk
                        LOL!

                        I opted for split boards on the baffle.
                        Electronics engineer, woofer enthusiast, and musician.
                        Wogg Music
                        Published projects: PPA100 Bass Guitar Amp, ISO El-Cheapo Sub, Indy 8 2.1 powered sub, MicroSat, SuperNova Minimus

                        Comment


                        • #87
                          Speakers complete! Now I just need to do some light sanding and apply some danish oil to freshen up the old walnut. Meanwhile... here's the results:

                          Right vs Left system gated comparison
                          Click image for larger version

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                          The scale is zoomed in from default, overall within +-3dB with the narrow dip at 5.5k keeping it from being tighter than that. The biggest diference betwee L and R is in the tweeter range, where they deviate just under 2 dB from each other at 10k.

                          Impedance sweep L
                          Click image for larger version

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                          Impedance sweep R
                          Click image for larger version

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                          Both are easy 8 ohm loads.
                          Electronics engineer, woofer enthusiast, and musician.
                          Wogg Music
                          Published projects: PPA100 Bass Guitar Amp, ISO El-Cheapo Sub, Indy 8 2.1 powered sub, MicroSat, SuperNova Minimus

                          Comment


                          • #88
                            Before I go oiling them up I'm going to listen to them properly, with music and junk. You know, like speakers
                            Electronics engineer, woofer enthusiast, and musician.
                            Wogg Music
                            Published projects: PPA100 Bass Guitar Amp, ISO El-Cheapo Sub, Indy 8 2.1 powered sub, MicroSat, SuperNova Minimus

                            Comment


                            • #89
                              Nice. I like how you mounted all parts to your removable baffle, making for a nice, neat package that can easily be removed for future repairs or modifications. Cool.
                              SideTowers: http://techtalk.parts-express.com/fo...corundum-build
                              Totally Flat: http://techtalk.parts-express.com/fo...5-totally-flat
                              Plumber's Delight: http://techtalk.parts-express.com/fo...notech-winners
                              Linehopper: http://techtalk.parts-express.com/sh...Esoteric-build

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                              • #90
                                The measurements look great.

                                Looking forward to your further report.

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