Polyswitches are out

musky1963
musky1963 Posts: 275
edited January 2012 in Vintage Speakers
I took the little mustard switches out and put in jumpers on my 2.3tl's. I can now say is that I finally got some sparkling treble, with alot more detail! I have only had the speakers for a month or so. My first impressions were that the uppers sounded way to soft and veiled. I really wasn't impressed with them and was trying to see what all the fuss was over the 2.3tl's, but now I am getting more convinced as I am on the tweek/upgrade slope. MUCH better! :cool:
Jeff
Post edited by musky1963 on
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  • quadzilla
    quadzilla Posts: 1,543
    edited January 2012
    Welcome to the rabbit hole. Watch your head, and please keep all arms and legs inside the vehicle at all times. Don't be surprised if you find that it's too much after a few weeks. Personally, for that mod, I'd recommend a resistor between .1 and .2 ohm, ideally around .16-.17. That was the measured value of the original polyswitch. Yours have likely been tripped several times, and they eventually increase in resistance after each trip.
    Turntable: Empire 208
    Arm: Rega 300
    Cart: Shelter 501 III
    Phono Pre: Aural Thrills
    Digital: Pioneer DV-79ai
    Pre: Conrad Johnson ET3 SE
    Amp: Conrad Johnson Evolution 2000
    Cables: Cardas Neutral Reference
    Speakers: SDA 2.3TL, heavily modified
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  • PreCd
    PreCd Posts: 786
    edited January 2012
    Nice technical write up on this very subject over here:

    http://www.polkaudio.com/forums/showthread.php?128258-Resistor-Replacement-For-The-SDA-SRS-1.2TL-Polyswitch
    SDA2BTL
    Marantz CD5004
    Adcom GFA-545
    Bottlehead Quickie Tube Preamp
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  • TennMan
    TennMan Posts: 1,266
    edited January 2012
    musky1963 wrote: »
    I took the little mustard switches out and put in jumpers on my 2.3tl's. I can now say is that I finally got some sparkling treble, with alot more detail! I have only had the speakers for a month or so. My first impressions were that the uppers sounded way to soft and veiled. I really wasn't impressed with them and was trying to see what all the fuss was over the 2.3tl's, but now I am getting more convinced as I am on the tweek/upgrade slope. MUCH better! :cool:
    I read this and decided to jump the polyswitches on my Monitor 10Bs. They have blue polyswitches. After listening for an hour or so with the jumpers in place, I'm not sure it made much difference. The results you get with the jumpers must depend on the condition of your polyswitches. I can hear maybe just a little more sparkle to the highs but I don't hear much difference in definition. I do like the sound better with the jumpers in place. The RDO-194s have always been a little laid back for me and the jumpers seemed to help a tiny amount in that respect. I don't regret spending a few minutes to install he jumpers but I didn't hear any dramatic results I was hoping for. I guess I was expecting too much out of straight piece of wire. :biggrin:
    • SDA 2BTL · Sonicaps · Mills resistors · RDO-198s · New gaskets · H-nuts · Erse inductors · BH5 · Dynamat
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    • Marantz 1504 AVR (front speaker pre-outs to Adcom 555)
    • Adcom GFA-555 amp · Upgrades & speaker protection added by OldmanSRS
    • Pioneer DV-610AV DVD/CD player
    • SDA CRS+ · Hidden away in the closet
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  • musky1963
    musky1963 Posts: 275
    edited January 2012
    I tested the old ones and they were about 1.1-1.2 ohms. Guess they were due!
    Jeff
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  • sda2mike
    sda2mike Posts: 3,131
    edited January 2012
    quadzilla wrote: »
    . Yours have likely been tripped several times, and they eventually increase in resistance after each trip.

    that used to happen to me....but for entirely different reasons
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