Scan-Speek 4" for 49 cents?

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  • fatmarley
    Senior Member
    • Jan 2010
    • 909

    Re: Relapse

    There's a calculator here - LINK. I don't know how accurate it is though because it doesn't ask where you are adding the mass.

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    • jbruner
      Senior Member
      • Dec 2006
      • 677

      Re: Relapse

      The DAP Alex Plus Clear caulk has been an unqualified success as a damping compound for slits and surrounds. I have used it on surrounds for 5 years and on slits for 1 year so far with perfect results.

      The Wet Look was not effective for slits.
      "Looks like you may have to design your own speakers. Its not that hard." -DE Focht

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      • dlr
        Seasoned Veteran
        • Sep 2005
        • 4049

        Re: Relapse

        Originally posted by jbruner
        The DAP Alex Plus Clear caulk has been an unqualified success as a damping compound for slits and surrounds. I have used it on surrounds for 5 years and on slits for 1 year so far with perfect results.

        The Wet Look was not effective for slits.
        That's interesting. I found the Wet Look good for surrounds, never tried making slits. I'll have to get some of the DAP caulk to test. It will be good if it's better for surrounds, too.

        dlr
        WinPCD - Windows .NET Passive Crossover Designer

        Dave's Speaker Pages

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        • dlr
          Seasoned Veteran
          • Sep 2005
          • 4049

          Re: Relapse

          Did you actual cut out a section or just slice the diaphragm?

          dlr
          WinPCD - Windows .NET Passive Crossover Designer

          Dave's Speaker Pages

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          • jbruner
            Senior Member
            • Dec 2006
            • 677

            Re: Relapse

            The slits are just wide enough that the sides do not touch. I drag the knife backwards after cutting so the cut is visibly open.
            "Looks like you may have to design your own speakers. Its not that hard." -DE Focht

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            • dlr
              Seasoned Veteran
              • Sep 2005
              • 4049

              Re: Relapse

              Originally posted by jbruner
              The slits are just wide enough that the sides do not touch. I drag the knife backwards after cutting so the cut is visibly open.
              Thanks, sounds like a good way to do it.

              Looks like you've got a fairly thick application of the DAP.

              dlr
              WinPCD - Windows .NET Passive Crossover Designer

              Dave's Speaker Pages

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              • jbruner
                Senior Member
                • Dec 2006
                • 677

                Re: Relapse

                Originally posted by dlr
                Thanks, sounds like a good way to do it.

                Looks like you've got a fairly thick application of the DAP.

                dlr
                I was sloppy on the Tangband and just used my finger, but on others I have used an eye dropper to apply just in the gap, wiped flush on both sides, for a much neater look.
                "Looks like you may have to design your own speakers. Its not that hard." -DE Focht

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                • jbruner
                  Senior Member
                  • Dec 2006
                  • 677

                  Re: Scan-Speek 4" for 49 cents?

                  Originally posted by Sidi
                  underwhelmed.
                  Originally posted by Whitneyville1
                  Don't rag on him so hard! He turned a sow's ear into a pierced sow's ear.;)
                  I'd like to happily report that early predictions of "Meh", including my own, were wrong.

                  For the past year I have immensely enjoyed this little fullrange design, named "Silk Purse", utilizing an inexpensive 8-element contour filter.



                  Shown crossed at 100hz, on-axis and 30 degrees off-axis.

                  This design has been used at high spl (with a sub) and holds up well compared to some truly high-end speakers. It has a nice natural sound, even in the top octave. I'm quite surprised that cymbals and bells sound good on a fullrange 4" driver.

                  Also in white-
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                  Attached Files
                  "Looks like you may have to design your own speakers. Its not that hard." -DE Focht

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                  • dlr
                    Seasoned Veteran
                    • Sep 2005
                    • 4049

                    Re: Relapse

                    Originally posted by jbruner
                    I was sloppy on the Tangband and just used my finger, but on others I have used an eye dropper to apply just in the gap, wiped flush on both sides, for a much neater look.
                    I was thinking of the surround. The slits looked pretty smooth. The surround looks heavier.

                    dlr
                    WinPCD - Windows .NET Passive Crossover Designer

                    Dave's Speaker Pages

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                    • fatmarley
                      Senior Member
                      • Jan 2010
                      • 909

                      Re: Relapse

                      You could try Tannoy ribs:

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                      Or Fostex:

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                      • jbruner
                        Senior Member
                        • Dec 2006
                        • 677

                        Re: Relapse

                        Originally posted by fatmarley
                        You could try Tannoy ribs:

                        [ATTACH=CONFIG]57350[/ATTACH]

                        Or Fostex:

                        [ATTACH=CONFIG]57351[/ATTACH]
                        good research out weighs any pretty and ineffective ribbing
                        "Looks like you may have to design your own speakers. Its not that hard." -DE Focht

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                        • fatmarley
                          Senior Member
                          • Jan 2010
                          • 909

                          Re: Relapse

                          Grow a pair? How rude

                          Seriously though - Tannoy wouldn't have put ribs on the back of their drivers if it didn't make an improvement. Not sure if it would work with the slicing though.

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                          • jbruner
                            Senior Member
                            • Dec 2006
                            • 677

                            Re: Relapse

                            Originally posted by fatmarley
                            Grow a pair? How rude

                            Seriously though - Tannoy wouldn't have put ribs on the back of their drivers if it didn't make an improvement. Not sure if it would work with the slicing though.
                            Do It Yourself And Stop Suggesting Hopeful Or Likely Experiments!

                            This is all in fun and jest, but more seriously guys, is science dead?
                            I've demonstrated effective, proven techniques and I get constantly bombarded with demands that I try every wackadoo mod anyone can think of.
                            "Looks like you may have to design your own speakers. Its not that hard." -DE Focht

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                            • fatmarley
                              Senior Member
                              • Jan 2010
                              • 909

                              Re: Relapse

                              Sorry if the suggestions seem like pressure. I'm only suggesting them because you seem interested and I guess I thought others who are interested in this thread may also be interested.

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                              • jbruner
                                Senior Member
                                • Dec 2006
                                • 677

                                Re: Relapse

                                They are interested. Hell, I'm interested! Build it, measure it, and publish it right here!
                                "Looks like you may have to design your own speakers. Its not that hard." -DE Focht

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