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Scan-Speek 4" for 49 cents?

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  • jbruner
    replied
    Re: Scan-Speek 4" for 49 cents?

    Originally posted by J Fallows View Post
    Cut off the dust cap. Who needs a dust cap?
    OK


    Once again, sensitivity is unchanged because the dustcap weighs next to nothing. The good effects are above 15k, the cavity resonance is very bad.
    It doesn't affect the cone break-up at all.

    Blue is original, green modified.

    So we need to fill the gap. I will replace the dust cap with a dusty cap.



    Still only helps the last 1/2 octave.

    Leave a comment:


  • PWR RYD
    replied
    Re: Scan-Speek 4" for 49 cents?

    Cool experiment. I have some $5 buyouts I've thought of experimenting with coating the paper cones.

    Leave a comment:


  • fatmarley
    replied
    Re: Scan-Speek 4" for 49 cents?

    Originally posted by Tin_Ears View Post
    I'd be interested in this as well but I think wood glue or epoxy would be easier to work with to get it thicker.
    But don't you need something flexible to help damp the cone? I think something like contact adhesive, puncture repair glue or a thin bead of silicone would be best.

    Leave a comment:


  • Tin_Ears
    replied
    Re: Scan-Speek 4" for 49 cents?

    Originally posted by Thumper Tom View Post
    What would happen if you just did beads of thick super glue and not cut the paper?
    I'd be interested in this as well but I think wood glue or epoxy would be easier to work with to get it thicker. It would also be interesting to see what a uniform coating of wood glue over the entire surface (sans the surround) would do.

    Leave a comment:


  • jbruner
    replied
    Re: Scan-Speek 4" for 49 cents?

    Originally posted by ligs View Post
    Very interesting.
    How did you manage to keep cone mass the same after the surgery, maintaining the same sensitivity?
    The glue adds an almost insignificant amount of mass. On sample 2 the Fs went from 114 to 112.

    Originally posted by ligs View Post

    Is it possible to make an audio recording demo like here:
    http://www.harbeth.co.uk/usergroup/s...ther-materials
    I am on slow dial-up. It's difficult just to load a picture.

    Leave a comment:


  • Adam_G
    replied
    Re: Scan-Speek 4" for 49 cents?

    I agree on the 'try the glue without cutting it' crowd. Maybe it's just the glue damping that has the largest effect, rather than the cutting and damping. It would be cool to try it out!

    Leave a comment:


  • fatmarley
    replied
    Re: Scan-Speek 4" for 49 cents?

    Originally posted by jbruner View Post
    You are in luck. The NS6 is next on the execution list.
    Cool! Would be great if you could get rid of that peak centered around 4k.


    I honestly think you should try removing the dust cap on the cheaper driver to see what it does. I'd be very interested to see if it makes any further improvements - From what I've read there's a good chance it will.

    Leave a comment:


  • Sidi
    replied
    Re: Scan-Speek 4" for 49 cents?

    Originally posted by jbruner View Post
    You are in luck. The NS6 is next on the execution list.
    blasphemy

    Leave a comment:


  • jbruner
    replied
    Re: Scan-Speek 4" for 49 cents?

    Originally posted by knowledgebass View Post
    Seconded. Curious also if your experiment resulted in overlapping of the cut seams as well, or if the seam is just but t together.
    There is no overlap. It is a simple knife cut widened to a discernable gap by dragging the knife backwards. The glue is DAP Alex Plus clear caulk.

    Leave a comment:


  • jbruner
    replied
    Re: Scan-Speek 4" for 49 cents?

    Originally posted by fatmarley View Post
    Very interesting.

    I'd love to see the same done on a Aurasound NS6-255-8a. I only have four, so wouldn't want to risk it myself.
    You are in luck. The NS6 is next on the execution list.

    Leave a comment:


  • jbruner
    replied
    Re: Scan-Speek 4" for 49 cents?

    Originally posted by Thumper Tom View Post
    What would happen if you just did beads of thick super glue and not cut the paper?
    I can do that if you want, but the glue I used is flexible, not superglue. I don't think superglue would have much damping effect. Do you want me to try just beads of flexible glue?

    Leave a comment:


  • knowledgebass
    replied
    Re: Scan-Speek 4" for 49 cents?

    Originally posted by Thumper Tom View Post
    What would happen if you just did beads of thick super glue and not cut the paper?
    Seconded. Curious also if your experiment resulted in overlapping of the cut seams as well, or if the seam is just but t together.

    Leave a comment:


  • Melby Audio
    replied
    Re: Scan-Speek 4" for 49 cents?

    Very cool experiment. You may need to devise some sort guide jig before cutting up nicer drivers.

    Leave a comment:


  • fatmarley
    replied
    Re: Scan-Speek 4" for 49 cents?

    Originally posted by J Fallows View Post
    Cut off the dust cap. Who needs a dust cap?
    Joe Akroyd used to do that with his designs (Link)

    Leave a comment:


  • J Fallows
    replied
    Re: Scan-Speek 4" for 49 cents?

    Cut off the dust cap. Who needs a dust cap?

    Leave a comment:

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