Thinking of installing a pair of ADS speakers in a small master bathroom. Will the condensation from the shower damage the speaker cones? Obviously the speakers will be far outside the shower above g the sink over the mirrors.

If the cones are polypropylene, carbon fiber, or any number of non-paper synthetics, the cones will be fine.  Even if you got 7 years rather than 10 out of them, I wouldn’t fuss.

what sometimes gets tricky is the grills. Steel grills could discolor and rust over time. But grills are replaceable.

Sonance and other brands of course have speakers made for exactly what you’ve got going there.

Which model?

Their speakers had poly woofers and IIRC, Peerless LK10dt tweeters or a variant- I don't remember the tweeters always being treated/doped, so make sure to use the vent fan.

If these are something like the 300i car speakers (would be a good in-wall speaker), they should be fine.

I had an ADS PQ10 running speakers in an ooooold car. Man that thing could scream!