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Is an EARPHONE JACK the same as EXTERNAL SPEAKER jack???

Discussion in 'Misc Electronics' started by [email protected], Apr 29, 2006.

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  1. Guest

    I have a small metal outdoor speaker that used to be used for paging
    and general voice purposes. I was wondering if I plugged it into an
    EARPHONE jack of a radio, tape player etc... as long as the jack sizes
    were in sync if the speaker would work.

    In other words, is an EARPHONE jack basically the same thing as an
    EXTERNAL SPEAKER jack?

    Thanks in advance

    LEESA (I)
     
  2. Don Bruder

    Don Bruder Guest

    Usually (but not always) an "earphone" jack *IS* an "external speaker"
    jack with a level-limiting resistor attached to it, while a true
    "external speaker" jack is a straight shot from the final stage of the
    amplifier. Which means that if you've got the level-limited type of
    earphone jack *AND* an external speaker jack, the "speaker" one is going
    to give you a louder output than the earphone jack at the same volume
    setting on the knob.

    Don't confuse either of them with a "line out" jack. A line out won't
    drive a speaker (of any size) worth anything, since it's a fixed (and
    very low) level output intended to be piped to at least one more
    amplifier stage before hitting a speaker.
     
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