SDA -1C

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  • westmassguy
    westmassguy Posts: 6,850
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    verb wrote: »
    westmassguy wrote: »
    Pull the PR and post some photos of what the crossover looks like. If its the single rectangular crossover, 4th generation. If it's split round crossovers, could be a transitional PITA.

    Hey hey I got a transitional PITA! :smile: Of which you hooked me up! Thanks David!

    I seem to remember something along those lines...
    Home Theater/2 Channel:
    Front: SDA-2ATL forum.polkaudio.com/discussion/143984/my-2as-finally-finished-almost/p1
    Center: Custom Built forum.polkaudio.com/discussion/150760/my-center-channel-project/p1
    Surrounds & Rears: Custom Built forum.polkaudio.com/discussion/151647/my-surround-project/p1
    Sonicaps, Mills, RDO-194s-198s, Dynamat, Hurricane Nuts, Blackhole5
    Pioneer Elite VSX-72TXV, Carver PM-600, SVS PB2-Plus Subwoofer

    dhsspeakerservice.com/
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  • Schurkey
    Schurkey Posts: 2,130
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    The split "round" boards and the single rectangular board on SDA 1Cs have the same circuitry, same component values...in different form factors. NO functional difference as long as both contacts on the SDA socket are connected. Polk did not connect both contacts on some SDA 1Cs and 2Bs, the serial number list has been posted elsewhere. Easily fixed.
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  • Rpennino
    Rpennino Posts: 9
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    Hi everyone I just joined I recently picked up a pair of SDA 1 c with the horizontal tweeters. They came with no interconnect cable and the pins have two male post and 1 ground hole I did get them for free but was going to use a speaker negative and positive post to hook these up I do have the round coils on the crossovers had not messed with them yet I want to get the service manual with schematic to make sure just connecting the same pins are okay what's your opinion I can't find a pin interconnect with two female ends thanks
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  • Unknown
    Unknown
    edited September 28
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    This content has been removed.
  • Rpennino
    Rpennino Posts: 9
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  • Rpennino
    Rpennino Posts: 9
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    These seem to be the early version I have two Port holes that control the two upper woofers air escapes when you push them the 4 bottom woofers move with the 12 inch radiator I think they are great once I get everything sorted out thanks for any input
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  • Schurkey
    Schurkey Posts: 2,130
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    NOT "1C". That's the original SDA1.
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  • Bigbang
    Bigbang Posts: 235
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    I think you are correct. SDA1. Not SDA-1c’s.

    But. As long as I’m still the OP on this old thread…

    Can I interest anyone near Indiana in a set of SDA-1c’s of the studio variety? Not the 1c’s in the beginning of this post but some studios I picked up a few years ago. Those or some SDA-CRS’s. They are in the basement next to my 2.3’s that I love. I don’t need to get wealthy but I’d like the room back.

    If anyone has interest and I can get them to someone close, send me your info. Take a look at them and let’s figure out a number that we are both happy with. They both need a new home.

    Now… back to Rpennino.
    I like to listen, tinker, listen and repeat.
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  • F1nut
    F1nut Posts: 52,407
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    If you want to sell here you must list them in the Classified section with a price.
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  • Unknown
    Unknown
    edited September 29
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    This content has been removed.
  • Rpennino
    Rpennino Posts: 9
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    Wear would I get the speak on style plugs and can you send a picture thanks
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  • Unknown
    Unknown
    edited September 29
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  • F1nut
    F1nut Posts: 52,407
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    You are also missing a fuse holder cap and fuse. No workie without those.
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  • Rpennino
    Rpennino Posts: 9
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  • Rpennino
    Rpennino Posts: 9
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  • Rpennino
    Rpennino Posts: 9
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    Thank you for letting me know the positive and negative needs to be switched I would of thought they needed to be the same these are the SDA 1 not A or B or C I plan on fully restoring them to original the two fuse holders I will have to change out with Bussmans I can keep original ones on one speaker they are from 1983 and one 1984 models
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  • Rpennino
    Rpennino Posts: 9
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    I know positive and negative are critical with these but I have no transformer like in the latter models and as you can see on the crossover you can see the negatives and positives are tied together I would think switching the positive and negative would effect the rest of the crossover and short the coils
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  • Schurkey
    Schurkey Posts: 2,130
    edited September 29
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    Rpennino wrote: »
    I plan on fully restoring them to original
    You'd be better-off to download the "SDA 1 Signature" modification list, and upgrade them to "SDA 1 Signature" (equivalent to SDA 1A) specs. You'll have to source the parts yourself, Polk isn't supplying them any more.
    https://us.v-cdn.net/5021930/uploads/attachments/1/8/5/1/1/31009.pdf
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  • Unknown
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  • F1nut
    F1nut Posts: 52,407
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    I know positive and negative are critical with these but I have no transformer like in the latter models
    SDA speakers do not have a transformer.
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  • F1nut
    F1nut Posts: 52,407
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    Someone had an idea.
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  • Rpennino
    Rpennino Posts: 9
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    It looks like to me I just need to match blue left to blue right and white left to white right and they should work I seen those pictures when I was researching the wiring thanks for the information
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