Tacky/Sticky Woofer?

lakedmb
lakedmb Posts: 35
edited August 2009 in Vintage Speakers
Out of curiosity, how come the woofers on the M5jr+'s have a tacky/sticky feel to them?

Is there any benefit from this or by chance a trend of some sort? At first, I thought that the previous owner had done something, but after seeing this come up at a few other places I came to the conclusion that it must have been applied during production.

Thanks!
Post edited by lakedmb on
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  • comfortablycurt
    comfortablycurt Posts: 6,745
    edited August 2009
    I'm not sure why they have the tacky texture, it is normal though. It's just a result of the treatment that was found to work best on the paper cones I'd imagine.
    The nirvana inducer-
    APC H10 Power Conditioner
    Marantz UD5005 universal player
    Parasound Halo P5 preamp
    Parasound HCA-1200II power amp
    PolkAudio LSi9's/PolkAudio SDA 2A's/PolkAudio Monitor 7A's
    Audioquest Speaker Cables and IC's
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  • lakedmb
    lakedmb Posts: 35
    edited August 2009
    Thanks for the response. I'm glad that it isn't a defect.
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  • treitz3
    treitz3 Posts: 19,214
    edited August 2009
    No, be rest assured that it is not a defect.
    ~ In search of accurate reproduction of music. Real sound is my reference and while perfection may not be attainable? If I chase it, I might just catch excellence. ~
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  • F1nut
    F1nut Posts: 50,751
    edited August 2009
    It's called a doped paper cone offering an improved performance over plain paper cones. Many, including myself, believe that doped paper cones are still the best, presenting a natural tone/sound.
    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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  • lakedmb
    lakedmb Posts: 35
    edited August 2009
    I agree, this is one of the better sounding budget speakers I have ever heard.

    Are doped paper cones still used today?
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  • Face
    Face Posts: 14,340
    edited August 2009
    I believe so: http://www.madisound.com/catalog/product_info.php?cPath=45_228_256&products_id=789
    "He who fights with monsters should look to it that he himself does not become a monster. And when you gaze long into an abyss the abyss also gazes into you." Friedrich Nietzsche
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  • nooshinjohn
    nooshinjohn Posts: 25,463
    edited August 2009
    Damn those look awfully close to the real deal
    The Gear... Carver "Statement" Mono-blocks, Mcintosh C2300 Arcam AVR20, Oppo UDP-203 4K Blu-ray player, Sony XBR70x850B 4k, Polk Audio Legend L800 with height modules, L400 Center Channel Polk audio AB800 "in-wall" surrounds. Marantz MM7025 stereo amp. Simaudio Moon 680d DSD

    “When once a Republic is corrupted, there is no possibility of remedying any of the growing evils but by removing the corruption and restoring its lost principles; every other correction is either useless or a new evil.”— Thomas Jefferson
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  • comfortablycurt
    comfortablycurt Posts: 6,745
    edited August 2009
    I've seen quite a few car subwoofers that have the same type of texture on the cones. So, it is still used today. They definitely have a very natural sounding tone...I love the way these vintage Polk's sound.:D
    The nirvana inducer-
    APC H10 Power Conditioner
    Marantz UD5005 universal player
    Parasound Halo P5 preamp
    Parasound HCA-1200II power amp
    PolkAudio LSi9's/PolkAudio SDA 2A's/PolkAudio Monitor 7A's
    Audioquest Speaker Cables and IC's
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  • Ron Temple
    Ron Temple Posts: 3,212
    edited August 2009
    Danny Ritchie is still using doped paper on his designs. They aren't tacky, but the same basic idea.

    Combo rig:

    Onkyo NR1007 pre-pro, Carver TFM 45(fronts), Carver TFM 35 (surrounds)
    SDA 1C, CS400i, SDA 2B
    PB13Ultra RO
    BW Silvers
    Oppo BDP-83SE
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  • F1nut
    F1nut Posts: 50,751
    edited August 2009
    Yeah, they are still around. Also, seems that the DIY crowd likes to dope their plain paper drivers.
    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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  • OldmanSRS
    OldmanSRS Posts: 419
    edited August 2009
    Zig-Zag cone drivers.
    '65 427 Shelby Cobra
    '72 Triumph TR-6
    __________________
    '88 Polk SDA SRS 1.2, with upgraded XO caps and Erse SDA inductors
    '86 Polk SDA CRS+
    '84 Polk Monitor 10A (Peerless tweeters)
    '05 HSU VTF-3 Sub (Original OEM)
    '20 HSU VTF-3 Sub (three more, 100% cloned)
    '93 Carver TFM-35
    '88 Carver M-1.0t
    '88 Adcom GFT-555
    '88 Adcom GFP-555
    '88 Adcom GFA-555 (upgraded/restored)
    '88 Adcom GFA-555 (a second one upgraded/restored)
    '05 Onkyo DV-555 media
    '89 Fosgate 360 Digital Space Matrix
    '89 Fosgate 360 Digital Space Matrix, internal surround amp bridged to drive only a center channel
    '91 Kenwood Basic M1D Amp
    '89 Pioneer Laser Disc media
    '89 Sony SuperBeta HiFi media
    One PGA2310 based custom built remote volume control
    Four Polk T-15's
    Four Polk TSi-200's
    Four Polk TSi-100's
    Two Polk CS-10's
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  • gdb
    gdb Posts: 6,012
    edited August 2009
    A while ago...I asked about coatings for speaker cones on the PE forum and got some advice from some "hardcore" DIY speaker builders. I never bothered to mess with the Advents anyway, I just bought some Monitor 10s for outdoor duties. Gotta love butyl surrounds when you have better things to do than re-foaming old woofers !!:)

    http://techtalk.parts-express.com/showthread.php?t=205614
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  • Face
    Face Posts: 14,340
    edited August 2009
    OldmanSRS wrote: »
    Zig-Zag cone drivers.

    http://www.madisound.com/catalog/product_info.php?products_id=1479
    "He who fights with monsters should look to it that he himself does not become a monster. And when you gaze long into an abyss the abyss also gazes into you." Friedrich Nietzsche
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