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  1. #1

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    Default SDA SRS 2 and SDA1C

    In studying crossover diagrams posted in the sticky by DK I see that the 1C and the '87 model srs2 use the exact same x-over and drivers. The SRS2 uses a 15"fluid coupled passive and a much larger enclosure with different driver orientation than the 1C.

    What does fluid coupled mean in terms of the radiator. I assume there would be much better bass extension with the SRS2. is this correct? Does anyone have any more specifics as to the cabinet volumes and any of the differences in these 2 designs. Are there any other differences that i am missing? And finally how do the SRS2's sound compared to the 1Cs (I would assume the primary difference would be in the bottom end due to the cabinet and radiator, but would also expect some differences in mid-range presence and sound-stage due to the driver placement).

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    Fluid coupled is a fancy pants word for a passive radiator system which is based on a sealed cabinet and the air pressure inside the cabinet moves the passive radiator and produces the lower bass.

    The SRS2 does have more bass because of the extra 3" of the PR. The drivers on the SRS2 are set farther apart, more than any other SDA. These 2 things give the SRS2 a different sound. Some think it's better, some think it's about the same, some think it's overdone.

    If the SRS2's are in the same room they have more bass and the SDA properties can be more pronounced (that could be good or bad).

    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 Aleph 30; Eastern Electric Mini Max; Adcom GDA600; MIT S3/Z Pc; SDA 1C; Squeezebox; Tubes add soul!

  3. #3

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    The drivers on the SRS2 are set farther apart, more than any other SDA.
    are these farther apart than the 1.2's as well?

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    Quote Originally Posted by oliverbubbles View Post
    are these farther apart than the 1.2's as well?
    IIRC, yes
    "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 Aleph 30; Eastern Electric Mini Max; Adcom GDA600; MIT S3/Z Pc; SDA 1C; Squeezebox; Tubes add soul!

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    As far as driver placement goes the SRS are the widest as far as Driver Placement goes.

    They have a unique sound all there own. I am not the biggest fan of this model but in the right room I am sure I could be a fan.
    Quote Originally Posted by Timothy Smith View Post
    WOW!

    That's like working your way through Katie Perry in order to get to Rosie O'Donnell.

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    interesting info, I have never heard the SRS2's but would be curious to now.

    Did Polk decide this design was not the best after production?

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    Quote Originally Posted by chandler9a View Post
    interesting info, I have never heard the SRS2's but would be curious to now.

    Did Polk decide this design was not the best after production?
    Not sure about that, if you look at the history of SDA, there is a lot of variation as it was work in progress.

    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 Aleph 30; Eastern Electric Mini Max; Adcom GDA600; MIT S3/Z Pc; SDA 1C; Squeezebox; Tubes add soul!

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    I own both models and yes the SRS 2's have more bass and a wider soundstage. Interestingly, I find the SDA 1C's a little better on the top end. I have a feeling it is the fact that the 1C's have the tweets by themselves over the drivers. I always felt there was better tonal seperation with 1C's over SRS 2's. It is not the case when compared to 1.2's or 1.2tl's. This is just a personal observation. Both of my sets of speakers have RDO 194's tweets, so everything is equal.
    Polk HT system 1: LSIC, LSI25 mains, LSI F/X rears, Lsi F/X rear centers,
    Yamaha RX-V2500 System, Sunfire grand 5 channel, Carver A753 3 channel amp.

    Polk HT system 2: ,Polk CS1000 center, Polk cs400rear center, Polk RT800 mains stacked with RT55's, Polk F/X 1000 rears running on a Yamaha RX-V2200

    Polk Speaker collection: SDA SRS 1.2tl x 2, SRT system, SDA SRS 2 P/B, SDA 2A, SDA 1C Studio, SDA CRS+, Monitor 12 series 2, 7B & 4, SRS 3.1tl, RTA 15tl, LS90

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