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Connecting Power to Speakers

Discussion in 'Electronic Basics' started by Guest, Jun 17, 2004.

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  1. Guest

    Guest Guest

    Hi All,

    I want to connect a pair of mini hifi speakers to my PC but they wont play
    through my sound card.
    They play fine when connected to the headphone jack of my existing speakers
    so I assume that the sound card is not providing any power.
    I'm 90% certain that the speakers require 12v. I cannot remenber the speaker
    ratings but I'll check as soon as I can.

    Can I connect a small 12v transformer from an old radio and how should I do
    it. Most importantly I do not want to damage my sound card and PC.

    Thanks in advance,

    mc
    chotsATidwsDOTcoDOTza
     
  2. Rich Grise

    Rich Grise Guest

    You're welcome in advance.

    The sound card is "not providing any power," true, but not in the way that
    you seem to be thinking. It sounds like your new speakers are just plain
    speakers, that need to be driven with an amplifier's output; your sound
    card has only a "line out," which drives an amp. input, but not speakers,
    and the phone jack on your existing speakers comes off their internal amp.

    If that's the case, then your only choice is to build a little amp for
    them or plug them into something else that already has an amplifier. To
    build an amp, look up e.g. http://www.national.com/pf/LM/LM386.html

    Good Luck!
    Rich
     
  3. JeffM

    JeffM Guest

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