mics to speakers (at)

Subject: mics to speakers
Date:    Thu, 7 May 1998 08:59:01 -0400

To list, A dynamic microphone (coil and magnet) can be used as a small speaker for the same reason that a generator can be used as a motor. Bob Masta has noted that a condenser microphone is similarly reversible. But many inexpensive condenser microphones come with built-in FET, and these are presumably not reversible because of the asymmetry of the FET. Best, Bill H.

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DAn Ellis <dpwe@ee.columbia.edu>
Electrical Engineering Dept., Columbia University