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[–] 6 points 1 week ago (2 children)

Any device with a speaker can be retasked to use it as a microphone.

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  • [–] 4 points 1 week ago*

    Well... No. And opamp output is fully different than an opamp input. They aren't reversible.

    The electronics would have to be specially designed to be a transceiver instead of just a speaker output (I mean, they definitely can do it, it just is more work and more cost)

    It would be 10x cheaper just to put a microphone in it.

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