Question on dynamated 15" passive radiators

fjross
fjross Posts: 183
edited May 2012 in Vintage Speakers
Would anyone happen to have an pic on how you dynamatted the PR's. I noticed there are raised ribs on the spokes that come out from the center. Is this were you applied the dynamat?

Thanks Dave
Mcintosh MC-501 mono blocks
Mcintosh C-45
Mcintosh MVP-871
PS AUDIO AV5000
MIT 3.3 Shotgun biwire speaker interface
MIT 3.3 Shotgun XLR interconnects
Polk 2.3TL's Gimpod boards/F-1 modded crossovers/dynamat/JB weld/Larry's rings/Blackhole 5 strips
Polk 3.1 TL's mint/stock (purchased new)
Polk SDA-2's
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Comments

  • EndersShadow
    EndersShadow Posts: 17,590
    edited May 2012
    Here is a pic for ya:

    http://www.polkaudio.com/forums/showthread.php?74306-Fun-With-Foam-SDA-Driver-Basket-Insulation&p=1274786&viewfull=1#post1274786
    "....not everything that can be counted counts, and not everything that counts can be counted." William Bruce Cameron, Informal Sociology: A Casual Introduction to Sociological Thinking (1963)
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  • F1nut
    F1nut Posts: 50,561
    edited May 2012
    fjross wrote: »
    Would anyone happen to have an pic on how you dynamatted the PR's. I noticed there are raised ribs on the spokes that come out from the center. Is this were you applied the dynamat?

    Thanks Dave

    Yes, the spokes and on the PR's, do the round end bell piece as well.
    Political Correctness'.........defined

    "A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."

    President of Club Polk

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  • fjross
    fjross Posts: 183
    edited May 2012
    Thanks for the replies. I just got done with finishing up 1 speaker with the Black hole 5 (4" strips) as well as a set of Larry's rings and the Cardas binding post upgrade. I'm looking forward to audition the800va dreadnaught for the first time with my monoblocks. Does anybody have a trick for wiping down the sticky material on the drivers?
    Mcintosh MC-501 mono blocks
    Mcintosh C-45
    Mcintosh MVP-871
    PS AUDIO AV5000
    MIT 3.3 Shotgun biwire speaker interface
    MIT 3.3 Shotgun XLR interconnects
    Polk 2.3TL's Gimpod boards/F-1 modded crossovers/dynamat/JB weld/Larry's rings/Blackhole 5 strips
    Polk 3.1 TL's mint/stock (purchased new)
    Polk SDA-2's
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  • drumminman
    drumminman Posts: 3,396
    edited May 2012
    fjross wrote: »
    Thanks for the replies. I just got done with finishing up 1 speaker with the Black hole 5 (4" strips) as well as a set of Larry's rings and the Cardas binding post upgrade. I'm looking forward to audition the800va dreadnaught for the first time with my monoblocks. Does anybody have a trick for wiping down the sticky material on the drivers?

    If you mean the MW cones, people here tend to use Windex to clean them.
    "Science is suppose to explain observations not dismiss them as impossible" - Norm on AA; 2.3TL's w/sonicaps/mills/jantzen inductors, Gimpod's boards, Lg Solen SDA inductors, RD-0198's, MW's dynamatted, Armaflex speaker gaskets, H-nuts, brass spikes, Cardas CCGR BP's, upgraded IC Cable, Black Hole Damping Sheet strips, interior of cabinets sealed with Loctite Power Grab, AI-1 interface with 1000VA A-L transformer
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  • Mr. Bubbles
    Mr. Bubbles Posts: 736
    edited May 2012
    I'll try to find pics of mine when I get home. The drivers are much simpler to dynamat effective as they are smaller and have the added benefit of the magnet /top plate/ pole peice for some stiffening/damping effect on their frames. I found when dynamatting the passive frames, (especially the 15's) I needed multiple layers to satisfactorily dampen the frames. I judged this by tapping the frame with the end of my finger (no contact with my nail) and listening for any ringing in the frame. I actually ended up using 3 layers on the ribs of the 15's a large more complete layer first and then smaller peices on top of those with a layer underneath on the cone side as well, and 2 layers on the back flat area. This may have been overkill as once mounted with gaskets, more damping is applied to the frame, but i found it easier than mounting, listening, removing and redoing.
    If con is the opposite of pro, is Congress the opposite of Progress?!


    Monitor 5Jr, Monitor 5, RTA12, RTA 15TL, SDA 2A, 1c, SRS 2, 1.2TL, CRS, Atrium.
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  • F1nut
    F1nut Posts: 50,561
    edited May 2012
    Does anybody have a trick for wiping down the sticky material on the drivers?

    As mentioned, Windex works very well. Spray it on a lint free cloth and wipe in a circular motion.
    Political Correctness'.........defined

    "A doctrine fostered by a delusional, illogical minority and rabidly promoted by an unscrupulous mainstream media, which holds forth the proposition that it is entirely possible to pick up a t-u-r-d by the clean end."

    President of Club Polk

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  • transmaster
    transmaster Posts: 428
    edited May 2012
    A great source for Dynamat is Summit Racing, and Jegg's. I have delt with both and they are good to go, take your pick. Below is a door speaker kit which is what you want.

    [http://www.summitracing.com/parts/DYC-10415/

    [    http://www.jegs.com/i/Dynamat/327/10415/10002/-1[url][/url]
    Radio Station W7ITC
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