1. Join Now

    AVForums.com uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

Explanation of different Crossover Characteristics needed!!

Discussion in 'Home Cinema Speakers' started by Jase, Oct 14, 2002.

  1. Jase

    Jase
    Well-known Member

    Joined:
    Mar 16, 2001
    Messages:
    9,468
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    136
    Location:
    South Coast
    Ratings:
    +892
    If someone would like to explain the different characteristics of crossovers and what it all means, how it works etc as I´m sure I´m not the only one that is confused by it.

    We have THX crossovers doing their thing, others doing something else. By explanation I mean the degree of roll off etc and what the octave, 3rd order etc bits actually mean!

    Many thanks in advance.:)
     
  2. Ian J

    Ian J
    Banned

    Joined:
    Aug 6, 2001
    Messages:
    25,528
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    166
    Ratings:
    +4,906
  3. rob_w

    rob_w
    Guest

    Products Owned:
    0
    Products Wanted:
    0
    Ratings:
    +0
    Octave/roll off info::)

    an increase of 1 octave = doubling Hz

    ie: 90Hz - 180Hz = 1 octave
    1Khz - 2Khz = 1 octave

    slope is severity of roll of (decrease in volume) above x-over point.(also, at x-over point it is down by the order already)

    order = slope as such

    1st order = 6 Db per octave
    2nd order = 12 Db per octave
    3rd order = 18 Db per octave

    so if you have a 12 Db per octave x-over set to 100Hz, it will be -12DB @ 100Hz, -24Db@ 200Hz, - 36Db@400Hz etc.etc..

    This is very general, as there are different types of x-overs which deal with how the 2 drivers add up together - butterworth, linkwitz riley, bessel, chebychec - these all have slightly different curves....

    hth

    Rob
     
  4. uncle eric

    uncle eric
    Guest

    Products Owned:
    0
    Products Wanted:
    0
    Ratings:
    +0
    Are you after Mike K's job :rolleyes:
     
  5. Jase

    Jase
    Well-known Member

    Joined:
    Mar 16, 2001
    Messages:
    9,468
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    136
    Location:
    South Coast
    Ratings:
    +892
    Thanks Rob!:) Now it´s clearer.

    Cheers for the link Ian.
     
  6. Jase

    Jase
    Well-known Member

    Joined:
    Mar 16, 2001
    Messages:
    9,468
    Products Owned:
    0
    Products Wanted:
    0
    Trophy Points:
    136
    Location:
    South Coast
    Ratings:
    +892
    :confused:
     

Share This Page

Loading...