I assume this is same for your hospital application
I will give you some another idea.
Take L and R of Line-out of your TV and connect it into voltage amplifier/line distributer system. Feed it to each speaker points using shielded cables along with 230V supply line. It should be perfect and don't make them adjacent.
Contact some industry and make required number of 3" amplified speakerboxes using TA7368P(1W) IC which is fairly enough with ON/OFF and volume on preset.
I think you can smell some benefits over that