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Impedance

Discussion in 'Home Cinema Speakers' started by roland, Dec 14, 2003.

  1. roland

    roland
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    On a manufacturers website it states, "Impedance (Nominal) Ohms 4-8". Are these speakers 4 ohms or 8 ohms, could it make a difference to the volume you will get from the amp, ie 8 ohms will be harder to drive than 4 ohms
    Thanks
     
  2. rob_w

    rob_w
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    8 ohms is actually easier to drive than 4ohms for most amps. If you post a link to the specific speakers you're asking about you'll get more answers. I reckon they means the impedance does'nt drop below 4ohms, which makes them an ok load.


    Rob
     
  3. roland

    roland
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    Thank you Robwells,
    The speaker I am refering to are the Mordaunt Short 302's
    Thanks
     
  4. Reiner

    Reiner
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    Most likely the speakers are 4 Ohm as there aren't any 4-8 Ohm speakers. The manufacturer just states that those speakers are compatible with an amp which can handle 4 to 8 Ohm loads.
    (The impedance of a speaker varies over a wide range.)

    There will be no difference in volume during normal use but of course a 4 Ohm speaker will put more load on the amp and hence more power is needed. This will reduce the headroom and indirectly the max. volume the system can deliver.
     
  5. Ed Selley

    Ed Selley
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    In this case, they are generally 8ohms but will definately go down to 4 during peaks (the only way we could get the required driver sensitivity). Due to their small size however, they are not really amp killers- at shows, there are Marantz AV amps running the premiere all day without ever breaking sweat.
     

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