RTA12c Help

nacki
nacki Posts: 4
in Technical/Setup
Ok next question. I have a Pair od RTA12C speakers I purchased New in 1986-87. 5 years ago I blew 1 Mid range and 1 tweeter. Purchased replacements from Polk. Tweeter is not a SL2000 but the new replacement. Anyway, new problem is the other SL2000 is cutting out when I start to push the power. The speakers are connected to a Carver 300 Watt per channel Amp. I had both coils for the tweeters checked and recapped thru Polk. Any Ideas as to why the cut out? Thanks again Nacki
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Best Answer

  • Nightfall
    Nightfall Posts: 10,086
    edited February 2015 Answer ✓
    Polyswitch or fuse?

    I can't remember for sure if some C's were still fused. I assume they're polyswitches though. Call Polk and order two of them, replace both polyswitches.
    afterburnt wrote: »
    They didn't speak a word of English, they were from South Carolina.

    Village Idiot of Club Polk
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Answers

  • nacki
    nacki Posts: 4
    Thanks, Will do Monday.
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  • Nightfall
    Nightfall Posts: 10,086
    I'm not saying problem solved but it's a very likely culprit and cheap.
    afterburnt wrote: »
    They didn't speak a word of English, they were from South Carolina.

    Village Idiot of Club Polk
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  • drumminman
    drumminman Posts: 3,396
    edited February 2015
    One thing to consider is polyswitches degrade over time (they trip easier), and degrade the sound quality. If you're using high quality amplification and don't drive the amp into clipping you'll get better results by replacing the polyswitch with a Mills resistor. Usually the 1/2 ohm 12 watt brings good results though you can also try 0.22 ohm if you like a bit more high end.

    The other suggestion I have is to get a replacement tweeter identical to the one you bought a few years ago (RD-0194 ?). Mismatched drivers not good.
    "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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