SDS 2.3TL tweeters

jim 249
jim 249 Posts: 347
edited October 2009 in Vintage Speakers
Hi; I have two tweeters that the dome was pushed in on when the previous owner put the grills on upside down. Both tweeters still work. Has anyone tried to remove the coil assembly and pushed the dome back out with say a pencil eraser? Can you mix the old syle tweeters with a new tweeter from Polk? Thanks!
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  • Bubinga99
    Bubinga99 Posts: 283
    edited October 2009
    Since the dome includes 2 layers of different metal films, if they're creased now from being pushed in they're probably creased forever. But you don't have much to lose by trying.

    When you remove the voice coil assembly, take a very thin piece of plastic (I used the plastic post-it page flags but anything that won't leave fibers or debris in the voice coil gap is fine) and stir it around in the voice coil gap to see if the ferro-fluid is still liquid.

    If it's not, that's probably a good indication you should replace all the tweeters. There are cases where 1990's-era ferro-fluid gets clumpy after all these years, not just on Polks.

    Since these are the bottom tweeters (or I assume they are, since that's where the grill brace hits on mine if I flip them), if you did want to try and just replace 1 tweeter per speaker, that would be the one that is least likely to show a difference.

    But I think the overwhelming consensus is to replace them all if you replace one
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  • F1nut
    F1nut Posts: 50,753
    edited October 2009
    Once creased they will never become uncreased. If you simply want to pull the domes out, try using tape applied to the outside of the dome.

    Mixing new news with old ones will work, but there is a difference in the sound between them. I'd recommend replacing all of them. You can thank me later. :)
    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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  • jim 249
    jim 249 Posts: 347
    edited October 2009
    Ok; I tried using tape to pull out the domes and it sort of worked but not to well. Since I now have to replace two tweeters, would I get the new sound if I put the new tweeter in the top spot since that is the one which puts out the most sound while the two lower tweeters are much softer in sound. Has anyone tried this? Thanks!!!
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  • george daniel
    george daniel Posts: 12,096
    edited October 2009
    Go large--replace all dem' tweets.;)

    PS-- I'll thank Jesse for you in person.
    JC approves....he told me so. (F-1 nut)
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  • zarrdoss
    zarrdoss Posts: 2,562
    edited October 2009
    jim 249 wrote: »
    Ok; I tried using tape to pull out the domes and it sort of worked but not to well. Since I now have to replace two tweeters, would I get the new sound if I put the new tweeter in the top spot since that is the one which puts out the most sound while the two lower tweeters are much softer in sound. Has anyone tried this? Thanks!!!

    You can certainly try. Replace-remove the pollyswitch is highly recommended also.
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  • zarrdoss
    zarrdoss Posts: 2,562
    edited October 2009
    you can also try and find some used ones on here or e-bay, I think a sl-2500 will work also.
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  • jim 249
    jim 249 Posts: 347
    edited October 2009
    Hi All; Thanks for your help. What is the pollyswitch? Thanks!
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  • zarrdoss
    zarrdoss Posts: 2,562
    edited October 2009
    jim 249 wrote: »
    Hi All; Thanks for your help. What is the pollyswitch? Thanks!

    The pollyswithch is protection for your tweeters, if it gets to much power it will shut off and then re-set and come back on when the power gets lower. Good idea, trouble is over the years it gets weak and starts tripping at low levels and affects sound quality. Polk will send you some new for free.
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  • F1nut
    F1nut Posts: 50,753
    edited October 2009
    The SL2500 will not work and it's a polyswitch, also known as a PTC resettable fuse. :)

    Polk is no longer stocking them. Mouser sells them.
    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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  • zarrdoss
    zarrdoss Posts: 2,562
    edited October 2009
    damn you spell-check! So Polk is totally out? and also just curious as to why the 2500 would not work?
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  • rocket
    rocket Posts: 71
    edited October 2009
    i have 8 leftover tl tweeters if interested- i went with rdo-198's
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