CS speaker design question

eaadams
eaadams Posts: 213
edited February 2005 in Speakers
So the CS400i's have this:
http://www.polkaudio.com/home/technology/antidiffraction.php?category=3&speaker=176

The CSi40's do not. How did polk change the csi40 to compensate? They sold for the same amount but were they in reality really different?
Post edited by eaadams on
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  • VR3
    VR3 Posts: 28,775
    edited January 2005
    Not quite sure how they did it with the CSi40...

    But the CSi5 has a 'floating' grill...

    I'm sure Polk covered their tracks with the CSi40 though... maybe recessed the grill to bring the drivers closer to the grill...

    I think the whole thing about anti-difraction (talking out my butt here) - it basically,they recessed the woofers within a baffle, and made a grill to fit around the baffle, and the grill and baffle acted as the front of the speaker, so basically the drivers sound radiated straight off, instead of hitting the edge of the grill, anti-diffration. Thats how I gathered it...

    Dosnt really answer your question, maybe I'm just trying to figure out the anti-diffraction thing for myself ;)
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • eaadams
    eaadams Posts: 213
    edited January 2005
    Vr3MxStyler2k3 I have to give you major props on your website! Wow! but where are the polks?

    What would "recessed the grill to bring the drivers closer to the grill" do?
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  • VR3
    VR3 Posts: 28,775
    edited January 2005
    Well basically, it would act as a 'baffle' -

    You would have to recess the drivers though to keep them from hitting the grill.

    Basically, it is the same thing they did with the CS400i - just without the baffle. Just moving the front forwards and mounting the grill level...

    I dont think the CSi40 utilizes any of that technology...

    And, thanks for the props on the website!

    As for my Polks, I have had some Polks over my course of 3 years here...

    RT25i, RT35i, RT5, RTi70, CS245i

    And I have a pair of RT8s coming sometime next week. Miss the sound of the RT5. Recently switched over to Def Tech last year (around May or so)
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • eaadams
    eaadams Posts: 213
    edited January 2005
    I did notice that the back of the CSi40 has two powerports while the back of the CS400i has one. Maybie that is how they fixed the problem. I have heard tha the CSi40 is not so good on the lows as the CS400i. Perhaps that is why. Too much air flow.
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  • VR3
    VR3 Posts: 28,775
    edited January 2005
    Those are two seperate problems, and has nothing to do with diffraction.

    The power ports are geared torwards the effeciency, bass response (extention) of the speaker. Basically allows it to hit lower, and be more effecient while keeping a smaller enclosure...

    Not quite sure WHY it uses two power ports, maybe the midbasses are seperated, or maybe the port length couldnt be deep enough in the given cabinet so they used two... not sure, not a Polk engineer.
    - Not Tom ::::::: Any system can play Diana Krall. Only the best can play Limp Bizkit.
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  • eaadams
    eaadams Posts: 213
    edited January 2005
    r there any polk engineer's out there?
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  • eaadams
    eaadams Posts: 213
    edited February 2005
    I'd still like an answer re: anti-difraction and what was changed in the CSi40 line.
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  • hoosier21
    hoosier21 Posts: 4,413
    edited February 2005
    Originally posted by eaadams
    I'd still like an answer re: anti-difraction and what was changed in the CSi40 line.

    I have been on this forum for years, never have I seen anyone from Polk address a question like this one. Move and get over it ;)
    Dodd - Battery Preamp
    Monarchy Audio SE100 Delux - mono power amps
    Sony DVP-NS999ES - SACD player
    ADS 1230 - Polk SDA 2B
    DIY Stereo Subwoofer towers w/(4) 12 drivers each
    Crown K1 - Subwoofer amp
    Outlaw ICBM - crossover
    Beringher BFD - sub eq

    Where is the remote? Where is the $%#$% remote!

    "I've always been mad, I know I've been mad, like the most of us have...very hard to explain why you're mad, even if you're not mad..."
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  • PolkThug
    PolkThug Posts: 7,532
    edited February 2005
    I don't know, but the Csi40 makes for a great center. I only switched to a Csi5 for asthetic reasons.
    Never Forget
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  • hoosier21
    hoosier21 Posts: 4,413
    edited February 2005
    oops I lied, "Polk" Paul almost gave an answer here to my very same question.

    http://clubpolk.polkaudio.com/forum/showthread.php?s=&threadid=1916&highlight=bezel
    Dodd - Battery Preamp
    Monarchy Audio SE100 Delux - mono power amps
    Sony DVP-NS999ES - SACD player
    ADS 1230 - Polk SDA 2B
    DIY Stereo Subwoofer towers w/(4) 12 drivers each
    Crown K1 - Subwoofer amp
    Outlaw ICBM - crossover
    Beringher BFD - sub eq

    Where is the remote? Where is the $%#$% remote!

    "I've always been mad, I know I've been mad, like the most of us have...very hard to explain why you're mad, even if you're not mad..."
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  • PolkThug
    PolkThug Posts: 7,532
    edited February 2005
    Originally posted by hoosier21
    oops I lied, "Polk" Paul almost gave an answer here to my very same question.

    http://clubpolk.polkaudio.com/forum/showthread.php?s=&threadid=1916&highlight=bezel

    LMAO!

    Its probably cheaper to make without that chunk of plastic.
    Never Forget
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