How to change impedance?

Discussion in 'Archived Threads 2001-2004' started by Joenco, Jan 25, 2003.

  1. Joenco

    Joenco Auditioning

    Jan 2, 2003
    Likes Received:
    Hello all,

    Is it possible to change the impedance of a speaker from 4ohms to 8 ohms by placing a resistor in between? I know I can place 2 speakers in serie so that 2 four ohms speakers in serie have a total load of 8 ohms. Is it possible to get the same with one speaker and a resistor or something else?
    Of course I don't want to lose audio quality.

    A second question on the same subject.

    My kenwood receiver asks for a speaker load of 6-8 ohms. What will happens if I attach speakers with 4 ohms impedance? Will this destroy the receiver or will I only lose audio quality?

    Thank you,

  2. Brett DiMichele

    Brett DiMichele Producer

    Sep 30, 2001
    Likes Received:
    If your reciever specifies the lowest impedance that it can
    drive is 6 ohms then running a 4 ohm speaker will lower the
    impedance past the safe limit and it could (and probably
    will damage the speakers first.. then eventually the amp)

    The lower the Impedance the more freely power flows out of
    the amp, more power flows out than the amp can deal with
    and you create a ton of heat that can damage the Fet's and
    Resistors and Capacitors and you will cause the amp to send
    a clipped signal which will destroy the tweeters in no time

    2 4 Ohm Speakers wired Series is 8 Ohm, 2 4 Ohm Speakers
    wired Parallel is 2 Ohm.
  3. David_Stein

    David_Stein Second Unit

    Feb 13, 2002
    Likes Received:
    you would have to find a hell of a high power resistor to be able to use it in series with a speaker, because i think most of the ones ive ever seen are quarter watt resistors.

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