Sda srs 1.2tl

johnclayton
johnclayton Posts: 4
edited February 2014 in Troubleshooting
Is there any way to know if the posts in the back of the speaker are working correctly? My speakers were not used for YEARS and I am afraid that oxidation may have begun. The right channl speaker is weaker that the left. Especially in the high range. But the tweeters "Seem" to be working. They are the Polk SDA SRS 1.2tl. I would like to get the crossover board checked but dont know where to go. The local electronic repair shop guy looked lost when i talked to him so I definitiely am not taking it there...LOL SHould I start taking out screws and looking around? I dont want to start something and end up with pieces of speaker that I am unable to put back together :)

v/r

John
Post edited by johnclayton on
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  • michaeljhsda2
    michaeljhsda2 Posts: 2,185
    edited February 2014
    Is the interconnect cable hooked up?
    SDA SRS 2.3TL's
    Silk Audio MS-90-BT integrated tube amp
    Yaqin MS-20L integrated tube amp
    SDA 2B TL's
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  • zane77
    zane77 Posts: 1,696
    edited February 2014
    PM Trey ( VR3 ) on this forum or get to him ar VR3mods.com, he can take. Are of all of your crossover needs and does fantastic work.
    Home Theater
    Onkyo PR-SC5508 Sharp LC-70LE847U
    Emotiva XPA-5 Emotiva XPA-2 Emotiva UPA-2
    Front RTi-A9 Wide RTi-A7 Center CSi-A6 Surround FXi-A6 Rear RTi-A3 Sub 2x PSW505
    Sony BDP-S790 Dishnetwork Hopper/Joey Logitech Harmony One Apple TV
    Two Channel
    Oppo 105D BAT VK-500 w/BatPack SDA SRS 2.3 Dreadnought Squeezebox Touch Apple TV
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  • F1nut
    F1nut Posts: 50,668
    edited February 2014
    Either the polyswitch has failed or you have toasted a tweeter or more. Start with swapping the 3rd tweeter from the top with the same from the other speaker. If the right speaker now sounds correct then you have a bad tweeter. If it still sounds off then I would suspect a bad polyswitch.
    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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  • VCoak
    VCoak Posts: 200
    edited February 2014
    Not to hijack but if you do the Vr3 x-over upgrade does that eliminate the polyswitch? I am about to purchase the upgrade and just curious.
    W4S SX-1000, Adcom gfp-750, Polk 1.2tl, W4S DAC 2 DSDse, 2012 mac mini (mod), JRivers ver. 19, WD Cloud NAS 2 t.b., Monster Cable AVS-2000 signature, Doug's Alpha I/C & Doug's biwire 6' speaker cables
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  • F1nut
    F1nut Posts: 50,668
    edited February 2014
    Yes.
    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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  • Deadof_knight
    Deadof_knight Posts: 980
    edited February 2014
    I have a question what freqs does all of the 4 tweets play at since they all seem to be playing at a different volume or freq ?
    :cool: " He who dies with the most equipment wins Right ? "

    Denon 3300 Adcom 535 BBe w/sub out 1 pr 4.6s 2 pr of 4 jrs Recent additions Samsung Lns-4095D LCD, Samsung hd-960 DVD, Monster HT-5000 Power center    ,HPSA-1000 18" sealed DiY home sub.:D
    Black Laquer 1.2tl's w/ upgraded x-overs and Tweets BI-Amped with 2 Carver tfm-35's Knukonceptz 10ga cables
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  • PolkieMan
    PolkieMan Posts: 2,446
    edited February 2014
    The tweeters are line source all play in the lower range then they start shutting off as the freq goes up

    This will answer most of your questions Polk SDA Handbook

    http://vr3mods.com/uploads/SDA_Handbook_2011_Rev2.pdf

    I will tell u that you that my 2.3tls have lost two tweeters and one MW6510 in there lifetime but the
    crossover was okay just old and outdated. Empty paper towel roll works great for a quick by ear tester.
    POLK SDA 2.3 TLS BOUGHT NEW IN 1990, Gimpod/Sonic Caps/Mills RDO-198
    POLK CSI-A6 POLK MONITOR 70'S ONKYO TX NR-808 SONY CDP-333ES
    PIONEER PL-510A SONY BDP S5100
    POLK SDA 1C BOUGHT USED 2011,Gimpod/Sonic Caps/Mills RDO-194
    ONKYO HT RC-360 SONY BDP S590 TECHNICS SL BD-1
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  • VCoak
    VCoak Posts: 200
    edited February 2014
    Thx F1. Can not wait to hear the old girls once I am done.
    W4S SX-1000, Adcom gfp-750, Polk 1.2tl, W4S DAC 2 DSDse, 2012 mac mini (mod), JRivers ver. 19, WD Cloud NAS 2 t.b., Monster Cable AVS-2000 signature, Doug's Alpha I/C & Doug's biwire 6' speaker cables
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  • johnclayton
    johnclayton Posts: 4
    edited February 2014
    Yes it is.
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  • johnclayton
    johnclayton Posts: 4
    edited February 2014
    Thanks to all for the quick replys. The difference in sound from let to right is pretty obvious. It "seems" that at least two of the tweeters are working (I will try the paper towel roll technique tonight). Does getting the crossover mods evaluated / checked / fixed cost a lot :) I am not floating in money but if the cost is reasonable I would certainly get it done. Also, when it comes to switching tweeters, is it reletively simple (i.e., 4 screws and a quick disconnect of a wire or two) or does it involve some deep understanding of electronics. To answer Deadof_knight' question, at any volume and or frequency there is quite a difference. One speaker sounds "alive" the other will produce good base and midrange but bad on the high range...This even though it seems at least one of the tweets is working fine. SOmetimes it is hard to dicern where the high range sounds are coming from (midrange or tweeter). Again, thanks for the responses. I will test them again tonight. Hope I am answering these posts correctly BTW. I used the "Post Quick Reply" command button.
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  • Toolfan66
    Toolfan66 Posts: 17,311
    edited February 2014
    Just pull a tweeter, and you will realize how easy it is, pull the crossover plate as well there is nothing to it.

    It's easier then changing the tire on a car, it don't take long to figure it out.
    Polk Audio SDA 2.3tl Fully Hot Rodded. 😎

    SVS SB16 X2

    Cary SLP-05/Ultimate Upgrade.
    Cary SA-500.1 ES Amps
    Cary DMS 800PV Network
    OPPO UDP 205/ModWright Modification
    VPI Scout TT / Dynavector 20x2
    Jolida JD9 Fully Modified

    VPI MW-1 Cyclone RCM

    MIT Shotgun 3 cables throughout / Except TT, and PC’s
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  • VCoak
    VCoak Posts: 200
    edited February 2014
    Also on my 1.2 the positive and negative binding posts per the sticker on the back of the speaker was incorrect. I just found this out after owning them for years. Check your speaker cable and make sure your polarity is correct.

    Pulling the tweeters is very easy.
    W4S SX-1000, Adcom gfp-750, Polk 1.2tl, W4S DAC 2 DSDse, 2012 mac mini (mod), JRivers ver. 19, WD Cloud NAS 2 t.b., Monster Cable AVS-2000 signature, Doug's Alpha I/C & Doug's biwire 6' speaker cables
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  • michaeljhsda2
    michaeljhsda2 Posts: 2,185
    edited February 2014
    When removing the crossover plate, only remove the 8 outer bolts. If you remove the single middle bolt, the crossover will fall off and smash into the passive radiator below!
    SDA SRS 2.3TL's
    Silk Audio MS-90-BT integrated tube amp
    Yaqin MS-20L integrated tube amp
    SDA 2B TL's
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  • johnclayton
    johnclayton Posts: 4
    edited February 2014
    I will try to look at the tweeters and the crossover plate. As far as the binding posts are concerned I will check that also. How would I know if they are wrong...I guess there would be no or little output due to this. As far as the crossover plate is concerned, thanks for the info on the middle screw LOL, that IS a useful tip. Tonight will be a busy one.
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  • VCoak
    VCoak Posts: 200
    edited February 2014
    Sound will improve. Switching them around will cause no harm. The positive/red will be on the left and negative/black on the right.
    W4S SX-1000, Adcom gfp-750, Polk 1.2tl, W4S DAC 2 DSDse, 2012 mac mini (mod), JRivers ver. 19, WD Cloud NAS 2 t.b., Monster Cable AVS-2000 signature, Doug's Alpha I/C & Doug's biwire 6' speaker cables
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  • F1nut
    F1nut Posts: 50,668
    edited February 2014
    It was only the 1.2's, not the 1.2TL's that had to red and black caps reversed.
    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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  • leftwinger57
    leftwinger57 Posts: 2,917
    edited February 2014
    Jesse, Was any explanation ever given to the fact that Polk's color code is just about reversed in the low voltage universe. When I was installing house security systems red was alway + and black was always negative and if CAT-5 was used the solid wire conductor was the positive and stiped was neg. It made sense was taught like that in all the companies I worked for and never varied. If you used a different legend and was noted in the panel and back in the alarm panel then it was ok.
    2chl- Adcom GFA- 555-Onkyo P-3150v pre/amp- JVC-QL-A200 tt- Denon 1940 ci cdp- Adcom GFS-6 -Modded '87 SDA 2Bs - Dynamat Ext.- BH-5- X-Overs VR-3, RDO-194 tweeters, Larry's Rings, Speakon/Neutrik I/C- Cherry stain tops Advent Maestros,Ohm model E

    H/T- Toshiba au40" flat- Yamaha RX- V665 avr- YSD-11 Dock- I-Pod- Klipsch #400HD Speaker set-

    Bdrm- Nikko 6065 receiver- JBL -G-200s--Pioneer 305 headphones--Sony CE375-5 disc
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  • F1nut
    F1nut Posts: 50,668
    edited February 2014
    Was any explanation ever given to the fact that Polk's color code is just about reversed in the low voltage universe.

    Yes, they choose to use the high voltage color code.
    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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  • F1nut
    F1nut Posts: 50,668
    edited February 2014
    F1nut wrote: »
    It was only the 1.2's, not the 1.2TL's that had to red and black caps reversed.

    I should add to this. The SDA SRS is suppose to have the red on the right, black on left.
    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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