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Sunflower center build begins - and some questions

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  • Sunflower center build begins - and some questions

    Happy holidays fellow Tech talk members! I hope you all are enjoying yourselves and have some vacation time.

    After enjoying my Amiga towers for a while, I am finally in a position to build my sunflower center channel to complement them. We have a local supplier here for Dayton and similar parts express items and so I went yesterday to pick up all parts on my list. Now, they did not have exact matches for everything so there are two slight differences in parts list for the crossovers. I am wondering how that will affect my speaker build and if it will be a major issue. It is quite difficult to source parts here other than the place I went to and parts express wants like $30-40 USD just to ship.

    So here are the differences between Paul's sunflower CC list and what I purchased:
    - Required: 0.35mH inductor, Purchased: 0.36mH inductor
    - Required: 0.60mH inductor, Purchased: 0.62mH inductor
    - Required: 50mfd capacitor, Purchased: 51mfd capacitor
    - Required: 5.0mH inductor, Purchased: 5.1mH inductor

    The rest is all the same as the list. now I am aware that the inductors can be modified; can I not slightly unravel them to get closer to the actual values without affecting their performance? Also, for the 51 mfd capacitor, I know this would slightly lower the crossover point, but at only 2%difference than the one on the list (50mfd), will it be enough to make a noticeable experience in the final product?

    I will post some pics for your enjoyment of the parts :p

    Last edited by Evan Steeves; 01-03-2017, 08:04 AM.

  • #2
    The(parts) tolerances are probably wider than your spec errors! fugeddaboudit.

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    • #3
      Well here are the pics... the site won't let me upload them so had to copy from photobucket... will re-upload when I have access to a better computer!































      Last edited by Evan Steeves; 01-03-2017, 08:17 AM.

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      • #4
        Originally posted by davidB View Post
        The(parts) tolerances are probably wider than your spec errors! fugeddaboudit.
        aah that makes me happy! Thanks for the reply

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        • #5
          I am missing one 6-ohm resistor to be able to build the crossover, and I can't seem to find it anywhere. Anyone have an idea where I can source one, preferably in Canada?

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          • #6
            You are good to go (there'll be no discernible differences w/respect to Paul' s shopping list and the parts you bought).
            I thought the Sunflowers were "open back", or am I mistaken?

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            • #7
              Originally posted by Chris Roemer View Post
              You are good to go (there'll be no discernible differences w/respect to Paul' s shopping list and the parts you bought).
              I thought the Sunflowers were "open back", or am I mistaken?
              Chris, thanks for the confirmation. The sunflower towers are open backed but the center channel is a sealed design. the four 4'' Dayton speakers match my 7" Daytons in my Amiga towers so the timbre should match well for the setup.

              Can I go with a 6.2 ohm resistor as posed to the 6-ohm, which seems to be out of stock everywhere?

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              • #8
                absolutely

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                • #9
                  Perfect, thanks for all your help. Will be proceeding with this build! Keep you all posted with plenty of pics!

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                  • #10
                    Is there a public spec for the center speaker?

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                    • #11
                      Originally posted by kendomusic View Post
                      Is there a public spec for the center speaker?
                      What do you mean?

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                      • #12

                        Originally posted by kendomusic View Post Is there a public spec for the center speaker

                        Originally posted by Evan Steeves View Post

                        What do you mean?
                        Are there plans available somewhere.
                        Do you have a link.

                        I believe that's what he is asking.




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                        • #13
                          Originally posted by kendomusic View Post
                          Is there a public spec for the center speaker?
                          Originally posted by Dewmiester View Post

                          Are there plans available somewhere.
                          Do you have a link.

                          I believe that's what he is asking.
                          Aha yes, Paul Carmody was nice enough to post the plans in this thread:

                          http://techtalk.parts-express.com/fo...h-amigas/page3

                          It's a little pricier than the average center channel in terms of pars but I figure since it is arguably the most important speaker in the surround setup, I'd get something I was sure about and that can be used again if I decide to upgrade other speakership the surround system.

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                          • #14
                            So I ended up finding a 6 ohm resistor from my local Addison electronique store which was awesome so I do not have to drive back to solen half an hour away. They also had some nice binding posts.Will be beginning the crossover build today. Only thing I haven't figured out is if I should build crossover in one part or two, since room in the CC may be tight.

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                            • #15
                              Can someone verify this crossover for me? Tweeter works (left side of crossover) but no sound coming from any of the four Dayton woofers...I am stumped.

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