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First Time Builder - Sunflower Redux Project

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  • First Time Builder - Sunflower Redux Project

    Hope I haven't bit off more than I can chew. Any help is appreciated. I travel a lot so this project could take a few months to complete. Basic cabinet plan is completed, Interior dimensions give me 42.9 liters. Crossover layout is done and I did a quick mock-up this afternoon. Seems like it is time to get the saw blade and router spinning. Here are a couple of quick pics. Please excuse the hand drawing - best I could do on the plane ride.

  • #2
    nice work -- looking forward to seeing the completed project

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    • #3
      Looks great. I don't know how far apart your coils are, but you may want to follow some of the layout practices from here (i.e. avoid parallel placement of inductors without sufficient separation, etc.):
      http://www.troelsgravesen.dk/coils.htm

      Possible inspiration from my Redux build, still enjoying them to this day:
      http://techtalk.parts-express.com/fo...usic-lcr-build

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      • #4
        Originally posted by rvsixer View Post
        Looks great. I don't know how far apart your coils are, but you may want to follow some of the layout practices from here (i.e. avoid parallel placement of inductors without sufficient separation, etc.):
        http://www.troelsgravesen.dk/coils.htm

        Possible inspiration from my Redux build, still enjoying them to this day:
        http://<a href="http://techtalk.part...-lcr-build</a>
        Thanks for this. Looking again, do you think moving the top iron core inductor to the top right corner, then re-positioning the center air core inductors a bit might help? The components are on an 8.5" x 9.5" rectangle.

        I did read over your build thread (along with a few others) as I was contemplating this build. Beautiful work, and definitely inspiration!
        Last edited by ScottyP; 03-24-2019, 08:57 AM.

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        • #5
          It wouldn't hurt, but (due to the largeness of your board) I think you're OK.
          There's nothing really BAD going on there.

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          • #6
            If anything, I would just turn that center air core inductor 90 degrees so that its' core is oriented north-south instead of east-west like the two iron laminate core inductors are facing.
            Craig

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            • #7
              Originally posted by PWR RYD View Post
              If anything, I would just turn that center air core inductor 90 degrees so that its' core is oriented north-south instead of east-west like the two iron laminate core inductors are facing.
              I am working on a revision. Thinking of laying the center oriented up-down, moving the top iron core to the right top corner, Turning lower left and upper right oriented Northwest-Southeast and lower right air core inductor oriented Northeast-Southwest. I'll attach a sketch as soon as I have WiFi that is quick enough. Hotel connectivity is spotty here.

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              • #8

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                • #9
                  Yup,
                  but it also wouldn't hurt to turn the 3 angled ones CW or CCW 45* each (if that looked "better" - all the SAME rotation direction).

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                  • #10
                    here is the revised layout. Any "gotchas"?

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                    • #11
                      Originally posted by Chris Roemer View Post
                      Yup,
                      but it also wouldn't hurt to turn the 3 angled ones CW or CCW 45* each (if that looked "better" - all the SAME rotation direction).
                      Thanks, Chris. It seems that if you look through the coil as if it were a gun site, you should not see another inductor (unless I am interpreting the best practices in http://www.troelsgravesen.dk/coils.htm incorrectly. The only way I see to avoid this is positioning these at the angle. The 2 that are parallel are more than 20cm apart, so those should be ok. all others are "aimed" 90 degrees away from adjacent inductors. Am I missing anything?

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                      • #12
                        Considering building these as powered speakers using ICEpower boards. Any of you have experience using these?

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                        • #13
                          Originally posted by ScottyP View Post
                          Considering building these as powered speakers using ICEpower boards. Any of you have experience using these?
                          For what it's worth, I have a pair of Sunflower Reduxes as my go-to, main, satisfied-my-major-speaker-building-hunger. I use a HiFiMeDIY T3S to power them. They really R.O.C.K! This amp pushes the Sunflowers without breaking a sweat. I would imagine ICE amps would do the same.

                          I still love building speakers and continue to do so, but the Sunflowers are so satisfying, I don't have the desire to look for another pair of main listeners.

                          Mike
                          "We're speaker geeks, not speaker nerds. Nerds make money!" Marty H
                          Bismarck, North Dakota
                          My Current System: Jolida SJ502A, Squeezebox Touch, and Carmody Sunflowers
                          My Garage System:Marantz 2238B and Nano-Neos

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                          • #14
                            OK, the crossovers are completed. Lumber, drivers, etc are purchased. Hoping to make sawdust and start gluing next week!

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                            • #15
                              Originally posted by akon12
                              I have read your excellent post. This is a great job. I have enjoyed reading your post first time.
                              domo arigato mr roboto
                              Carbon13

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