need help with a passive radiator

DracoAmericanus
DracoAmericanus Posts: 112
edited February 2012 in Vintage Speakers
I was upgrading the foam gaskets and found on my 12 inch passive the back spider completely separated from the foam body and may have made matters worse with the adhesive , the orange goo usealy used for spiders and voice coil but the solvent did not like the Styrofoam, i am trying to evap the solvent and set the glue as fast as possible. what should i have used? :eek:
so far mine is not ruined at the time of this post but are these still available? it's for an SDA 1B
There is no cure....
Luxman M117, SDA SRS 2.3, rear monitor 10, back rear bose 4.2, valodyne sub and 2 Onkyo m-504 amps Onkyo TX-NR709
8mm, 7.62x39mm
Post edited by DracoAmericanus on
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Comments

  • drumminman
    drumminman Posts: 3,396
    edited February 2012
    As you found out lots of glues (I think mainly solvent based) are bad for foam. I would go to an arts and crafts store that sells styrofoam and ask them what to use. Don't know what the spider is made from, but it'll have to be compatible with that too and be able to withstand movement.

    Good luck!
    "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 February 2012
    I have used cyanoacrylate (super glue) to fix this problem in several speakers including some vintage Polk passives.
    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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  • civilian
    civilian Posts: 357
    edited February 2012
    Regular super glue will eat the foam, but there is a foam safe version available at hobby shops that do RC airplanes. Just ask for foam safe C.A. glue.
    Not sure this will fix the problem but it won't eat the foam.
    ________________
    2 Channel-Denon AVR-4520/SDA 2.3TL's
    5.1-Denon AVR-4500h/RT3000P's/CS1000P/RT2000P's/
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  • restanim
    restanim Posts: 227
    edited February 2012
    I used Elmers White Glue. It worked fine. I inspected the passive radiator about a year after the repair, and all was fine. There was no concern about melting the foam radiator and the glue was absorbed in the woven spider.

    Mike
    polkaudio

    Currently Own:
    RTA-11T Light Oak, Aug/2011 to present
    SDA-CRS+ Aug/2011 to present
    RTA-11T Black, Dec/2013 to present

    Previously Owned:
    SDA-SRS 2.3 May/1990 to June/1991
    SRS 1.2TL June/1991 to May/1995
    SDA-1C Aug/2005 to Dec/2011
    SRS 1.2TL Sept/2009 to Sept/2015
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  • pitdogg2
    pitdogg2 Posts: 25,447
    edited February 2012
    get a spare

    http://www.ebay.com/itm/1-POLK-AUDIO-SPEAKER-12-PASSIVE-RADIATOR-WOOFER-XLNT-CONDITION-/250968667569?pt=Speakers_Subwoofers&hash=item3a6ee5f5b1
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  • restanim
    restanim Posts: 227
    edited February 2012
    For $15 plus shipping, thats a good deal. I'd get it. Then you would have a spare.
    polkaudio

    Currently Own:
    RTA-11T Light Oak, Aug/2011 to present
    SDA-CRS+ Aug/2011 to present
    RTA-11T Black, Dec/2013 to present

    Previously Owned:
    SDA-SRS 2.3 May/1990 to June/1991
    SRS 1.2TL June/1991 to May/1995
    SDA-1C Aug/2005 to Dec/2011
    SRS 1.2TL Sept/2009 to Sept/2015
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  • DracoAmericanus
    DracoAmericanus Posts: 112
    edited February 2012
    I managed to stabilize the glue with a fan and thank you for the e-bay link and bought the passive radiator. thanks for the help and will be off to the craft store just so i have some glue on hand. the spider seems to be made just like any other just with the material not as densely made. thankfully it did not throw off the centering.
    There is no cure....
    Luxman M117, SDA SRS 2.3, rear monitor 10, back rear bose 4.2, valodyne sub and 2 Onkyo m-504 amps Onkyo TX-NR709
    8mm, 7.62x39mm
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