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  1. #1

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    Default SDA 2 identification

    I am about to sell my SDA 2 speakers and just want to make sure what model they are. They have the one tweeter but are blade/blade. Are they SDA 2A's or can they be SDA 2B's. I know most SDA 2B's are pin/blade.
    Polk HT system 1: LSIC, LSI25 mains, LSI F/X rears, Lsi F/X rear centers, Lsi 7's presence speakers,
    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

  2. #2

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    Hey old Buddy, I think I got an easy way to check! Take out the "Stereo" driver and see what part number it is. Looking at the SDA Driver chart:
    1) If it's a MW6510, then it's 2A's (The dim. driver would be the same)
    2) If it's a MW6503 then it's 2B's (The Dim. is MW6511)

    I hope this helps!!

  3. #3

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    I pulled the stereo driver and it is the MW6510. So it looks like it is the SDA 2A's. Thanks for the assist buddy.
    Polk HT system 1: LSIC, LSI25 mains, LSI F/X rears, Lsi F/X rear centers, Lsi 7's presence speakers,
    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

  4. #4

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    Anytime Bcomet!

  5. #5

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    Default

    I always thought SDA 2A had 3 drivers and 1 tweeter was there 2 different 2A's?

  6. #6

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    From the list, it looks like original SDA-2 had (3) MW6501 driver's...then the 2A's are as listed above. Maybe there were some transitional models made that showed this?

  7. #7

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    If you have 6510s, they are SDA 2A. One tweet, two mids (both 6510) post a pic if you want further confirmation.
    "The secret of happiness is freedom. The secret of freedom is courage." Thucydides

  8. #8

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    Quote Originally Posted by pitdogg2 View Post
    I always thought SDA 2A had 3 drivers and 1 tweeter was there 2 different 2A's?
    No, you're thinking of the original SDA 2's. The original 2's had 3 MW's and 2 tweeters each. The tweeters were the "dimensional" tweeters that all of the earliest SDA's had.

    2A's have 2 MW's, which are both 6510's, and one tweeter. The 2B's had 2 MW's, but used one 6503 and one 6511 in each, along with a single tweeter.

    There were also differences in the cabinets. The 2A's had all wood grain cabinets, with "pedestal" bases that put the cabinet itself a few inches above the floor. The 2B's had cloth sides, and wood top/bottom caps, such as the SDA 1C's. Most 2B's were pin/blade, but the earlier ones were blade/blade. There were also some transitional 2B's that used the 2A style cabinets, and blade/blade IC's.

    As others have said, you've got 2A's. I've got a pair of 2A's myself, and they're some fine sounding speakers.:)
    The nirvana inducer-
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    PolkAudio SDA 2A's/PolkAudio Monitor 7A's
    Audioquest Type 4 speaker cables
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    Signal Cable Analog II IC's

  9. #9

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    thanks guys just checked myself and both mine also 6510mw. I was always led to believe i had SDA2b's when in fact they are 2A's. Just goes to show your never to old to learn

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