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Poly cone vs poly dome

Discussion in 'Infinity Loudspeakers' started by mr_RBG, Sep 30, 2010.

  1. mr_RBG

    mr_RBG Well-Known Member

    Messages:
    605
    Location:
    College Park, MD, USA
    As I understand Infinity used poly dome mid drivers in RS speakers from '82-'86 era. So was it a step forward after poly cone before they moved to EMIN?
     

     

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  2. Tedrick

    Tedrick Infinity-phile Subscriber

    Messages:
    7,026
    Location:
    Gainesville, FL
    That's a matter of personal test, but for me, the answer is yes. I think the radiation pattern of the dome mids contributed to better imaging and soundstaging.
     
  3. mr_RBG

    mr_RBG Well-Known Member

    Messages:
    605
    Location:
    College Park, MD, USA
    Yes, probably, and on music too. On some rock songs it seems that it is not enough mids(missing some guitar notes).
     
  4. crazyjeeper

    crazyjeeper In The Groove...

    Messages:
    417
    Location:
    Dallas, Texas
    The cone mids tend to have a more punchy midrange that is more concentrated while the domes will have good dispersion but not the same forwardness.

    I haven't heard EMIMs, so I can't comment on them, but in the cones v. domes, right now I prefer cones but that is just because I tend to like heavier music and want that punchy forward midrange.

    I think it was more of a personal preference thing if you wanted domes over cones rather than any dramatic sonic improvement.
     
    CDELON likes this.
  5. Tedrick

    Tedrick Infinity-phile Subscriber

    Messages:
    7,026
    Location:
    Gainesville, FL
    To this discussion, I'll add that, in my opinion, the Polydomes are faster sounding and more articulate than a cone mid, which makes them a better match with the EMIT tweeter.

    I own the speakers in my avatar (RS-IIb's and RS-IIIb's), so I can offer my observations on EMIM vs. Polydome mids. While I enjoy the Polydomes in my RS-IIIb's, the EMIM's are better than the Polydomes in just about every way. The EMIM's are faster, more delicate, more detailed, more articulate, have more air, and throw a larger soundstage than the Polydomes.
     
  6. ohhwell

    ohhwell Mr Edit Button

    Messages:
    140
    Location:
    Spring Hill, FL
    yup, i will echo what everyone else said. the domes have more dispersion and sound more open. of course, that is not what everyone wants.
     

     

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  7. mr_RBG

    mr_RBG Well-Known Member

    Messages:
    605
    Location:
    College Park, MD, USA
    Thank you for so colorful explanation!

    Some day I will... some day... :)
     
  8. CDELON

    CDELON Active Member

    Messages:
    119
    Location:
    PA
    This just answered the question I just posted. Ty
     

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