How to tell what year SDAs were manufacured.......

rdupre
rdupre Posts: 36
edited April 2008 in Vintage Speakers
Just curious, is there a way to tell what year my SDA 1C's were manufactured? Serial Number, stamped? The serial number is 7331.

Thanks, Roger
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  • dorokusai
    dorokusai Posts: 25,577
    edited April 2008
    The serial number vs date of manufacture is not available.

    You can get it by pulling one or more mid-bass drivers and looking at the date stamped/written on the back. It's usually on the crossover as well.
    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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  • heiney9
    heiney9 Posts: 25,220
    edited April 2008
    Are your 1C's pin/blade or blade/blade (referring to the cable that connects between them).

    Very early 1C's used a blade/blade connection.
    "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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  • heiney9
    heiney9 Posts: 25,220
    edited April 2008
    Right and left most likely have a different serial #. It appears that with a 7331 serial number that speaker is compatible to use a non-common ground amp IF you have the AI-1 interphase cable. File that away for future reference and look at the serial number on the other speaker and let us know.

    H9

    P.s. My 1C serial #'s are 11713 and 11604 so I would guess yours are earlier models but not the earliest.
    "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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  • heiney9
    heiney9 Posts: 25,220
    edited April 2008
    There are 5 generations of SDA models. The 1C's are in the fourth generation and were produced from 1987-1990 but there could have been models produced in late 1986 and early 1991. No way to tell for sure an exact date of production.
    "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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  • SDA SRS 1.2
    SDA SRS 1.2 Posts: 255
    edited April 2008
    dorokusai wrote: »
    The serial number vs date of manufacture is not available.

    You can get it by pulling one or more mid-bass drivers and looking at the date stamped/written on the back. It's usually on the crossover as well.

    Exactly! That's the only way I could determine my date of manufacture. Excellent advice!
    Main System: Polk SDA SRS 1.2 Speakers, Sunfire Signature 600~two Amp, Carver C-16 Preamp, Carver TX-11b Tuner, Marantz 6350Q TT, Philips CDR-775 Recorder, Teac V-707RX Cassette Deck, Signal Cable Double Run Speaker Cable

    Upstairs Den: Marantz 2325 Receiver, Marantz 5220 Cassette Deck, Marantz HD-880 Speakers, Marantz 6370Q TT

    Exercise (Kabuki speaker) Room: Kenwood KR-9600 Receiver, Pioneer CS-99a Speakers, Sansui SP-X9000 Speakers (not pretty, but LOUD! :) )
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  • heiney9
    heiney9 Posts: 25,220
    edited April 2008
    dorokusai wrote: »
    You can get it by pulling one or more mid-bass drivers and looking at the date stamped/written on the back. It's usually on the crossover as well.

    That's a great rule of thumb but many times the drivers have been replaced or the production date coincides with the production date of the driver not nec the speaker model. But I'm sure if the drivers are original the dates will be close.

    When I sold Polk our driver replacement stock always had the production date the driver was manufactured. So if we replaced an sl2000 with production date Mar. 1990 that may have gone into and RTA 12 which was actually manufactured in 1986.

    I assume it's the same for drivers from the factory to a certain extent. The info on the drivers will get you in the ball park. I've never looked for a production date on a crossover but that sounds like it would be even better and more consistent.

    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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  • heiney9
    heiney9 Posts: 25,220
    edited April 2008
    rdupre wrote: »
    Just curious, is there a way to tell what year my SDA 1C's were manufactured? Serial Number, stamped? The serial number is 7331.

    Thanks, Roger

    Is there a particular reason? Or just because. :)
    "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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  • rdupre
    rdupre Posts: 36
    edited April 2008
    These are pin / blade.
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  • rdupre
    rdupre Posts: 36
    edited April 2008
    heiney9 wrote: »
    Is there a particular reason? Or just because. :)

    Yes - I bought these in 2004 so I am the second owner. I have another pair that I bought in 1990 and their serial number is 6xxx so I know they are built in 1990 or after. Does that make sense?

    The pair I bought in 2004 second hand has the serial numbers as:

    Left Channel 7331
    Right Channel 11024

    It just seems odd that those numbers are so far apart.

    The pair I bought new in 1990 has the left channel as 6351 and the right channel as 6299. The interconnect for this pair is blade/blade.
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  • rdupre
    rdupre Posts: 36
    edited April 2008
    heiney9 wrote: »
    There are 5 generations of SDA models. The 1C's are in the fourth generation and were produced from 1987-1990 but there could have been models produced in late 1986 and early 1991. No way to tell for sure an exact date of production.

    Well based on that information I would think this pair was made in 1990 or early 1991.
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  • F1nut
    F1nut Posts: 50,820
    edited April 2008
    Look on the crossover.
    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 April 2008
    No, they went back in time and installed them earlier...the date is just to confuse you.
    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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  • Marty913
    Marty913 Posts: 760
    edited April 2008
    rdupre wrote: »
    Yes - I bought these in 2004 so I am the second owner. I have another pair that I bought in 1990 and their serial number is 6xxx so I know they are built in 1990 or after. Does that make sense?

    The pair I bought in 2004 second hand has the serial numbers as:

    Left Channel 7331
    Right Channel 11024

    It just seems odd that those numbers are so far apart.

    The pair I bought new in 1990 has the left channel as 6351 and the right channel as 6299. The interconnect for this pair is blade/blade.

    It does seem a little far apart. My 1C's are 9087 & 9591. The original owner showed me a sales receipt from 1989. They are pin/blade. I haven't bothered to open them up - too busy listening to them.
    Sony 60'' SXRD 1080p
    Amp = Carver AV-705THX 5-Channel
    Processor = NAD T747
    Panasonic BD35 Blu-Ray
    Main = SDA-1C Studio with RD0s, spikes, XO rebuild, rings, I/C upgrade
    Center=Polk CS10, Surround = Athena Dipoles, Sub= Boston 12HO
    Music/Video Streaming = Netgear NEO550
    TT = Audio Technica
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