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What are OHM's?

Discussion in 'Home Cinema Speakers' started by hunkiemunkey, Apr 1, 2003.

  1. hunkiemunkey

    hunkiemunkey
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    Hi there,

    I currently am awaiting the arrival of an Sony STR-DB780 receiver, and when looking at the tech specs, noticed that it has switchable 4/8 Ohm.

    What exactly are Ohm's? And is 4 or 8 better?

    The speakers I am using are Mission M73's, so what "Ohm" do you recommend I use?

    Cheers

    John :hiya: :clap:
     
  2. auldendunn

    auldendunn
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    Ohm is the unit of resistance/impedance.
    The impedance of a loudspeaker coil varies with frequency. So a nominal impedance is quoted ( fora certain frequency).
    The output stage of an amplifier also has a nominal impedance value. Best results are achieved, in theory, when these are the same value in ohms.
    Your Mission 73s should work on either 4 or 8 ohm setting as they are quoted 8 ohm optimal and 4 ohm minimum. You should get best results with the 8 ohm setting.

    I think this is right, but there are many here with much greater knowledge than mine and if I am wrong they'll be along in a minute. :D :rotfl:
     

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