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Speaker impedance

Discussion in 'Misc Electronics' started by James Goforth, May 4, 2009.

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  1. I have an old Chevy Cavalier convertible with the factory AM/FM
    cassette player in it. The rear 6X9 speakers are missing.
    I have several old speakers lying around, which would be good enough
    for what I use the car for -- but the impedance listed on them varies
    between 4 ohm and 10.
    Meanwhile, the radio doesn't have any marking on it regarding how many
    ohm speakers it requires.
    Or does it even matter? What would be the possible consequences of
    using speakers of the wrong impedance? This is just a low-power unit,
    probably 3 watts or so. TIA
     
  2. Don Stauffer

    Don Stauffer Guest

    Using speakers with too low an impedance could overheat driver areas in
    the radio. Usually, though, an impedance mismatch only hurts the power
    the unit will deliver. Most radios will drive anything in the 4-8 ohm
    range fine. 8 ohm replacments are a good choice, though 4 ohm will
    likely work if you don't crank the volume up full.
     
  3. Charles

    Charles Guest

    If they are good speakers, they will work just fine.
     
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