SL2000 discoloration

HTguru1982
HTguru1982 Posts: 1,066
edited October 2011 in Vintage Speakers
I noticed this when taking pics for the System Showcase. There seems to be some odd discoloration around the SL2000 tweeters in my RTA's. The tweets in my Monitor 7's look fine.

Any ideas on what it might be?
Display: Sony 42" LCD
Sources: Harman Kardon DVD-27,
Panasonic DMP-BDT110 blu ray player
AVR: Sony STR-DA2400ES
Amps: Sonance Sonamp 260(fronts),
Kenwood KM-894(surrounds)
Fronts: NHT 2.5
Center: NHT VS-1.2A
Surrounds: NHT Super One
Subwoofer: SVS PB10-ISD
Post edited by HTguru1982 on
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  • heiney9
    heiney9 Posts: 25,165
    edited October 2011
    Yep, they are old........this happens. What is that downward sloping ramp?

    H9
    "Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass Pass Labs XA25 | EE Avant Pre | EE Mini Max Supreme DAC | MIT Shotgun S1 | Pangea AC14SE MKII | Legend L600 | BlueSound Node 3 - Tubes add soul!
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  • drumminman
    drumminman Posts: 3,396
    edited October 2011
    heiney9 wrote: »
    Yep, they are old........this happens. What is that downward sloping ramp?

    H9

    If those are RTA 12B's or C's it's part of the tweeter module. I suppose it's for anti diffraction or something like that. My 12C's have it.
    "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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  • heiney9
    heiney9 Posts: 25,165
    edited October 2011
    drumminman wrote: »
    If those are RTA 12B's or C's it's part of the tweeter module. I suppose it's for anti diffraction or something like that. My 12C's have it.

    Ok that makes sense. It's been a long time since I've seen an RTA12 in person.
    "Appreciation of audio is a completely subjective human experience. Measurements can provide a measure of insight, but are no substitute for human judgment. Why are we looking to reduce a subjective experience to objective criteria anyway? The subtleties of music and audio reproduction are for those who appreciate it. Differentiation by numbers is for those who do not".--Nelson Pass Pass Labs XA25 | EE Avant Pre | EE Mini Max Supreme DAC | MIT Shotgun S1 | Pangea AC14SE MKII | Legend L600 | BlueSound Node 3 - Tubes add soul!
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  • pitdogg2
    pitdogg2 Posts: 25,447
    edited October 2011
    heiney9 wrote: »
    Ok that makes sense. It's been a long time since I've seen an RTA12 in person.

    and you call yourself a Polk Phenom for Christ sakes......:redface:



    just friendly ribbing Brock
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  • F1nut
    F1nut Posts: 50,566
    edited October 2011
    Any ideas on what it might be?

    Yep, it's time for RD0194-1'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."

    President of Club Polk

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  • dorokusai
    dorokusai Posts: 25,577
    edited October 2011
    Thank goodness they took away titles like Polk Guru for post counts.... :biggrin:
    CTC BBQ Amplifier, Sonic Frontiers Line3 Pre-Amplifier and Wadia 581 SACD player. Speakers? Always changing but for now, Mission Argonauts I picked up for $50 bucks, mint.
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  • inspiredsports
    inspiredsports Posts: 5,501
    edited October 2011
    dorokusai wrote: »
    Thank goodness they took away titles like Polk Guru for post counts.... :biggrin:

    :mrgreen:

    My SL2000's looked like that too when I replaced them in 2008, but they seemed to sound the same (fatiguing) as they did when they were new in 1987.

    Yep, I second the RDO194-1 suggestion.
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  • HTguru1982
    HTguru1982 Posts: 1,066
    edited October 2011
    Looks like it's time for RD0's. Thanks guys.
    Display: Sony 42" LCD
    Sources: Harman Kardon DVD-27,
    Panasonic DMP-BDT110 blu ray player
    AVR: Sony STR-DA2400ES
    Amps: Sonance Sonamp 260(fronts),
    Kenwood KM-894(surrounds)
    Fronts: NHT 2.5
    Center: NHT VS-1.2A
    Surrounds: NHT Super One
    Subwoofer: SVS PB10-ISD
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