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Help on low frequency cut out?

Discussion in 'Electrical Engineering' started by David Ferree, Sep 15, 2004.

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  1. David Ferree

    David Ferree Guest

    Does anyone here know of any cheap and simple way, without purchasing
    two entire crossovers, to cut out the low frequencies to my two book
    shelf speakers? The other speakers I have in my system can handle all
    the power I put to them, but if I get the volume too high on anything
    with very low frequencies the two little speakers start to distort.
    I'd rather just turn them into mid and high range speakers and cut out
    the low end. I'm not too much of an electronic whiz, so what I'm
    looking for is something I can buy ready to use, cheap. Any ideas?


  2. Anthony

    Anthony Guest

    Try the RatShack.....
    They used to sell some inexpensive crossovers, no box, just the boards.
    I have them in a set-up I use. Can be mounted in the speaker box itself.


    You can't 'idiot proof' anything....every time you try, they just make
    better idiots.

    Remove sp to reply via email
  3. David Ferree

    David Ferree Guest

    I used some of theirs on some speakers I built years ago, but they
    don't sell them anymore. The thing is, I don't want to send the low
    frequency anywhere (to any speaker), I just want to block it.
  4. Tim Perry

    Tim Perry Guest

    place a capacitor in series with the speaker. id guess about 10 uF
    non-polerized 35 working volts or higher.

    as you have not specified a frequency cutoff, speaker impedance, we kind of
    have to guess.

    for more high and less lows make the cap smaller (less uF)

    the cap goes directly to the speaker. if its a self powered speaker, its a
    different matter.
  5. David Ferree

    David Ferree Guest

    Thanks for your answer. The speakers are 8 ohms, and I'm thinking I
    want to cut out everything below about 300 Hz. According to a chart I
    found, that looks like about 70 uF. All of which I'd have never known
    if you and others hadn't helped me out by responding. Thank you.

    David Ferree
  6. Norm Dresner

    Norm Dresner Guest

    I've seen people selling crossover networks designed to go into speakers on
    eBay in a sub-category of Home Audio. One or two of these [with the right
    properties, of course] would do what you want.

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