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whats the difference between dipoles and bipoles

Discussion in 'Home Cinema Speakers' started by The Sheriff, Jan 23, 2003.

  1. The Sheriff

    The Sheriff
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    i thought they were basically the same thing, difuse the sound so as not to sound like its comming from one point.

    Also, if they are to make the sound more widespread then shouldnt we use them on the front soundstage and have 5 or 7 bi/dipoles throughout the system.
     
  2. EvilMudge

    EvilMudge
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    Di-poles have the front and rear of the drive units 180 degrees out of phase. Bi-poles have both units in phase.
    In simple terms a bi-pole sounds most like two speakers put back to back. A di-pole is an entirely different kind of sound, almost as if there is no point source (or the good ones do)
    Bi-poles are designed to reduce the localisation of rear effects - you can still tell where the sound comes from, but it's smeared out (it sounds like it's coming from two places at once).
    Di-poles are designed to recreate the soundfield you hear in a cinema with lots of speakers, you only get a vague sense of direction (Left/Rear/Right) rather than a precise location. Also, the closer you get to a di-pole, the quieter it sounds - very important in home cinemas, since we tend to sit quite close to our speakers and the near one can drown out the far one.

    Mirage agree with you on the whole bi-polar front LCR issue, and Paradigm have tried it and abandoned the concept in favour of monopoles. Don't know if any other company has given it a try with the possible exception of Martin Logan, but that's a whole different story entirely.

    HTH
     
  3. The Sheriff

    The Sheriff
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    thanks for the info, that seems a bit strange that dipoles get quieter as you get closer.

    what sort of price are dipoles, i have seem some mission bipoles that cost only £100 (dont know how good they are). Are bipoles this cheap?
     

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