Water dancing in a Speaker Answered
at 6 volts,* the speaker cone filled with water produces standing waves.
at 10 v, maxing out the speaker, water droplets splash up.
i coated the paper cone of 1 speaker with liquid electrical tape to waterproof it. an identical speaker went unmodified. water doesnt seem to harm the paper cone. both speakers work with water.
when directed down into a bucket of water, sound stirs the water.
* chopped dc voltage from an ordinary ac to dc transformer