Found extra magnets stuck to the back of the drivers of my sda srs 2.3

scubasteve4sq
scubasteve4sq Posts: 72
edited July 2014 in Vintage Speakers
I'm wondering if these are supposed to be there or if someone did this. I noticed they sounded strange so I pulled the offending driver and this is what I found


https://www.dropbox.com/s/qnrr23mbok7hzul/2014-07-27%2008.50.24.jpg

https://www.dropbox.com/s/0vgob0yot8c80au/2014-07-27%2010.59.48.jpg

These are 6511's on the 2.3's I pulled a 6511 out of my 1c's and it does not have this extra magnet.
Post edited by scubasteve4sq on
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Comments

  • Nightfall
    Nightfall Posts: 10,086
    edited July 2014
    If I am not mistaken they are to shield an old CRT TV from the effects of the speaker magnets. I'm not 100% though.
    afterburnt wrote: »
    They didn't speak a word of English, they were from South Carolina.

    Village Idiot of Club Polk
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  • brgman
    brgman Posts: 2,859
    edited July 2014
    Nightfall wrote: »
    If I am not mistaken they are to shield an old CRT TV from the effects of the speaker magnets. I'm not 100% though.

    I agree.
    Strange thing is,in the dozen plus SDA's i have opened up over the years only one had these.
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  • Mystery
    Mystery Posts: 2,546
    edited July 2014
    I had those on SDA-2B's.
    Buckling magnet for magnetic shield for old TV's.

    Klipsch RB81, KG3.5, B&W DM602.5, Polk.
    Subwoofers: Klipsch RW10, Triad ProSub Bronze.
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  • scubasteve4sq
    scubasteve4sq Posts: 72
    edited July 2014
    Well the glue has failed and they are making the cones scrape the coil as they misalign. Would it be OK to remove them?
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  • scubasteve4sq
    scubasteve4sq Posts: 72
    edited July 2014
    Ok thanks guys I was really scratching my head about this. I'm going to epoxy the driver magnets in place before I remove these just to ensure no movement takes place.
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  • scubasteve4sq
    scubasteve4sq Posts: 72
    edited July 2014
    I will for sure. I just got a set of 1c's that rub the coils when you push them in and out so I am going to call polk and get some replacements and some backups. Luckily it looks like the 2.3 and the 1c share a lot of similar drivers so that should work well.
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  • F1nut
    F1nut Posts: 50,554
    edited July 2014
    Yep, bucking magnets. I have them on my SDA's.
    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."

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  • F1nut
    F1nut Posts: 50,554
    edited July 2014
    I have a feeling someone added the buckling magnets to the drivers

    It was an option from Polk. You could also order them separately and install them yourself.
    I just got a set of 1c's that rub the coils when you push them in and out

    I'm not so sure the off center bucking magnets are the cause of the rubbing.
    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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  • scubasteve4sq
    scubasteve4sq Posts: 72
    edited July 2014
    The 1c don't have the buckling magnets. Just rubbing coils. The 2.3 only had that 1that was out of alignment and with it removed there is no rub
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  • scubasteve4sq
    scubasteve4sq Posts: 72
    edited July 2014
    The 1c had a dented in dust cap on the driver that was rubbing so I figured it just needed to be replaced
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  • F1nut
    F1nut Posts: 50,554
    edited July 2014
    The 2.3 only had that 1 that was out of alignment and with it removed there is no rub

    Interesting.
    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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  • scubasteve4sq
    scubasteve4sq Posts: 72
    edited July 2014
    The opposing poles of the magnets were face to face (N to N or S to S. Not sure of the polarity but the buckling magnets was repelled from the back of the driver) however with it slid off to one side like it was the Magnet is actually attracted to the driver.
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  • Schurkey
    Schurkey Posts: 2,101
    edited July 2014
    F1nut wrote: »
    It was an option from Polk. You could also order them separately and install them yourself.
    I learn something new every day.
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  • Toolfan66
    Toolfan66 Posts: 17,241
    edited July 2014
    There is no way a bucking magnet is going to cause the voice coil to rub, the glue on the main magnet of the driver will have given out.
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  • Mystery
    Mystery Posts: 2,546
    edited July 2014
    I misspelled.
    Correct should be bucking, not buckling. :smile:
    Toolfan66 wrote: »
    There is no way a bucking magnet is going to cause the voice coil to rub, the glue on the main magnet of the driver will have given out.
    The VC must have gone through the original magnet all the way outside for that to happen. :wink:

    Klipsch RB81, KG3.5, B&W DM602.5, Polk.
    Subwoofers: Klipsch RW10, Triad ProSub Bronze.
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