One poster suggested to look for speakers as used in surround systems.
They should be available in all sorts of sizes and quality classes.
But they usually rely on the presence of a separate subwoofer for low frequencies.
How much space do you have for the speakers?
Where between high-end HIFi and listening to the news is your expectation?
ETA:
just searched Amazon for "wall mounted speakers", and a lot of hits come up. Like this:
https://www.amazon.com/dp/B000CMM202/ref=cm_sw_r_cp_awdb_t1_ZvUlDbASEM30Z(I have no idea if these are any good and there are plenty more companies out there that make or sell speakers. Just giving an example)
