Quote:
Originally Posted by Al Skierkiewicz
A speaker connected across one of the digital outputs will likely exceed the current rating on the driver trying to sink current with an 8 ohm load.
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Yeah, it might not be able to source enough current to an 8 ohm load to be as loud as you might want.
It shouldn't hurt the transceiver though. RS-232 drivers and receivers must be able to withstand indefinite short circuit to ground or to any voltage level up to ±25 volts.