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Scan-Speek 4" for 49 cents?

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

    Thanks, Wolf.
    Here's another picture and the on-axis comparison, blue original.

    Click image for larger version

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    Click image for larger version

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    Leave a comment:


  • Wolf
    replied
    Re: Pm180-8 ue

    Originally posted by jbruner View Post
    CHALLENGE ACCEPTED


    PE never came through with free drivers, so I bought some. I will start a new thread for this one with a full set of measurements.
    Attachment no worky.
    Wolf

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  • jbruner
    replied
    Pm180-8 ue

    Originally posted by caleb View Post
    Part Express linked to this thread on their facebook page. Hey maybe they could send jbruner some free drivers so he can improve them with slits and document the work and improvements. I mean something like oh I don't know say a pair of Dayton Audio PM180-8 6-1/2" :D
    CHALLENGE ACCEPTED


    PE never came through with free drivers, so I bought some. I will start a new thread for this one with a full set of measurements. Edit- New thread- How to Train Your PM180-8
    Attached Files
    Last edited by jbruner; 06-03-2015, 11:07 AM.

    Leave a comment:


  • jbruner
    replied
    Re: Relapse

    They are interested. Hell, I'm interested! Build it, measure it, and publish it right here!

    Leave a comment:


  • fatmarley
    replied
    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.

    Leave a comment:


  • jbruner
    replied
    Re: Relapse

    Originally posted by fatmarley View Post
    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.

    Leave a comment:


  • fatmarley
    replied
    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.

    Leave a comment:


  • jbruner
    replied
    Re: Relapse

    Originally posted by fatmarley View Post
    You could try Tannoy ribs:

    [ATTACH=CONFIG]57350[/ATTACH]

    Or Fostex:

    [ATTACH=CONFIG]57351[/ATTACH]
    good research out weighs any pretty and ineffective ribbing

    Leave a comment:


  • fatmarley
    replied
    Re: Relapse

    You could try Tannoy ribs:

    Click image for larger version

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    Or Fostex:

    Click image for larger version

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    Leave a comment:


  • dlr
    replied
    Re: Relapse

    Originally posted by jbruner View Post
    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

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

    Originally posted by Sidi View Post
    underwhelmed.
    Originally posted by Whitneyville1 View Post
    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-
    Click image for larger version

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    Attached Files

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  • jbruner
    replied
    Re: Relapse

    Originally posted by dlr View Post
    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.

    Leave a comment:


  • dlr
    replied
    Re: Relapse

    Originally posted by jbruner View Post
    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

    Leave a comment:


  • jbruner
    replied
    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.

    Leave a comment:


  • dlr
    replied
    Re: Relapse

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

    dlr

    Leave a comment:

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