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  1. #1
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    Default Helpful hint--speaker replacements

    Replacement Sonalerts (or equivalents) may be found on old PC motherboards. Since DSP RDs are at TTL levels, the 5/6 V units on motherboards are nearly perfect. If in doubt, check the DCR on the old one and the same on the candidate. ~20% variation should be fine.

    Also, the speakers from DELL latitude laptops may be good for non Sonalert designs. As ususal YMMV

  2. #2
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    Default Re: Helpful hint--speaker replacements

    If in doubt, check the DCR on the old one and the same on the candidate. ~20% variation should be fine.
    For those unfamiliar with billspeak: Use an ohmeter to measure the voice-coil resistance. This will be app. 80% of the accepted "impedance".

 

 

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