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  1. #1
    Old School
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    Question STEREO DIMENSIONAL SURROUND Speaker???

    Anybody know the story behind this old model?

    http://cgi.ebay.com/ws/eBayISAPI.dll...&category=1499
    More later,
    Tour...
    Vox Copuli
    Better to remain silent and be thought a fool, than to open your mouth and remove all doubt. - Old English Proverb

    "It's easy to get lost in price vs performance vs ego vs illusion." - doro
    "There is a certain entertainment value in ripping the occaisonal (sic) buttmunch..." - TroyD
    "Death doesn't come with a Uhaul." - Dennis Gardner

    Rebuilding Maggie 2-ch & Amazing 2-ch... Building 2-ch "wall"... Figuring out the HT

  2. #2

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    Wow, very bizarre..
    At first I thought Monitor 4, but definitely not.

  3. #3

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    Maybe it was meant to blend with the sdas for home theatre? Just a thought.

  4. #4

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    Very strange. A quasi SDA rear using a dvc midbass maybe?

    I find it interesting that both left and right inputs (from amp) go to this speaker, then it has an RCA out to the 'left' SDS speaker.

    We've seen these once before here, on ebay, maybe 6 months ago. That time it was a pair.

    Cheers,
    Russ
    Check your lips at the door woman. Shake your hips like battleships. Yeah, all the white girls trip when I sing at Sunday service.

  5. #5
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    Russ,
    Good eyes... I really did not catch the writing and all earlier.

    So it's some kind of matrixing scheme given the opposite channel inputs. And I think that's a jack like is used for headphones rather than the standard RCA we are used to seeing today.

    I think we need Matt to tell us what this was all about... then har will probably want six of them. :D

    Which reminds me ... is anything going to come of the on-line conversation with Matt discussed a while back?
    More later,
    Tour...
    Vox Copuli
    Better to remain silent and be thought a fool, than to open your mouth and remove all doubt. - Old English Proverb

    "It's easy to get lost in price vs performance vs ego vs illusion." - doro
    "There is a certain entertainment value in ripping the occaisonal (sic) buttmunch..." - TroyD
    "Death doesn't come with a Uhaul." - Dennis Gardner

    Rebuilding Maggie 2-ch & Amazing 2-ch... Building 2-ch "wall"... Figuring out the HT

  6. #6

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    All starting to make sense now Tour.

    You are right, that does look like an 1/4" 'headphone' type jack. IF IT IS, that means they can send a stereo signal (left and right) to the other end of the cable.

    Let me speculate even further, since the RIGHT speaker is getting both l&r inputs, and I'm going to guess it manipulates those signals somehow, and sends the info to itself AND the other (left) speaker... Starting to sound more and more like SDA.

    Interesting, for sure. Obviously, it didn't take off though. ;)

    Cheers,
    Russ
    Check your lips at the door woman. Shake your hips like battleships. Yeah, all the white girls trip when I sing at Sunday service.

  7. #7
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    Originally posted by RuSsMaN
    Interesting, for sure. Obviously, it didn't take off though. ;)
    So you think har will only want four?

    Dropped a note in a Ken S. thread (good read BTW) to hopefully draw a little Polk employee, or owner, attention to this thread.
    More later,
    Tour...
    Vox Copuli
    Better to remain silent and be thought a fool, than to open your mouth and remove all doubt. - Old English Proverb

    "It's easy to get lost in price vs performance vs ego vs illusion." - doro
    "There is a certain entertainment value in ripping the occaisonal (sic) buttmunch..." - TroyD
    "Death doesn't come with a Uhaul." - Dennis Gardner

    Rebuilding Maggie 2-ch & Amazing 2-ch... Building 2-ch "wall"... Figuring out the HT

  8. #8

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    You guys are a scream. AGAIN, something discussed during the Ice Age. These are Polk speakers with the Hafler DynaQuad circuit aboard. I saw, and almost bought a pair for $50 brand new during the 1st Gulf Excursion. Somebody back then (Paul I think) said it was basically a Monitor 4 with the Hafler stuff. Collectors items. You blew it. File them w/Polk tonearms. The idea was to hook your front speakers up to your amps "A" terminals, and the rear speakers up to the "B" terminals. The speakers had the encoding circuitry aboard. This allowed the "front" signal to flow untouched and unchanged to the front speakers, quieting critics who speculated the front channel info would be "changed" when sent downstream after ambience extraction of the rear signal. The right speaker was the control speaker (contained the Hafler circuit), that's why the separate hook-up to the left speaker.

    What else you need to know?

    George Grand (of the Jersey Grand's)
    Last edited by George Grand; 06-20-2003 at 09:56 PM.

  9. #9
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    Thanks George,

    So what we are seeing here is the right rear speaker? And the "headphone" jack supplied the signal to the left rear? Neat little bit of foreshadowing of the SDA's there...

    As with the tonearm, where I still hope you will enlighten this mere audio mortal, the old info you mention is nowhere to be found. Ditched... deleted... el gono... I've looked and your oldest surviving post is 07/09/01... Wasn't the first Gulf War a little earlier than that?
    More later,
    Tour...
    Vox Copuli
    Better to remain silent and be thought a fool, than to open your mouth and remove all doubt. - Old English Proverb

    "It's easy to get lost in price vs performance vs ego vs illusion." - doro
    "There is a certain entertainment value in ripping the occaisonal (sic) buttmunch..." - TroyD
    "Death doesn't come with a Uhaul." - Dennis Gardner

    Rebuilding Maggie 2-ch & Amazing 2-ch... Building 2-ch "wall"... Figuring out the HT

  10. #10

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    Maybe I haven't lost all my marbles, I actually remember that conversation.....

    BDT
    I plan for the future. - F1Nut

  11. #11

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    The SDA series pre-dated these little speakers. I SAW them during the 1st Gulf War, in a audio shop outside Portsmouth, N.H.
    The discussion with Paul took place two or three years ago. I should've bought those Polks for $50, but I spent the money on a passive Parasound woofer module (not about to use the term "sub" to describe something with two 5 1/4" woofs).

    George Grand (of the Jersey Grand's)

  12. #12
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    Hello,
    That is the SDS-400 speaker system, a very surround sound speaker system providing SDA retrieval of ambient information and producing it from the rear or side locations. This is the grandpa of today's home theater surround sound. If any reader would like, let me know a fax number or U.S. Mail address and I'll send a copy of the owner's manual, at no charge. My email address is kswauger@polkaudio.com.
    Regards, Ken

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