Based on your question about a good school public address system, I would recommend either the Behringer PPA2000BT or Behringer PPA500BT PA systems. Both offer multiple channels (2000W and 500W respectively) at a great price, which would be suitable for announcements in a school. The PPA2000BT in particular stands out as the most powerful option that can cover larger spaces. Both come from Behringer, a trusted brand for quality budget audio solutions. Please let me know if you need any other details! I apologize that I don't have access to the entire catalog in my current experimental state.
The Behringer EPS500MP3 and PPA500BT systems would both be excellent choices for your school's public address needs. As 8-channel and 6-channel mixers respectively, they give you plenty of inputs to connect different audio sources like microphones, music players, and more. Both produce clear, powerful sound with 500W output to fill your whole schoolyard or hall. Students and teachers will have no problem hearing announcements! The EPS500MP3 also includes an integrated MP3 player, so you can playback audio files right from the mixer. With prices of R8910 and R10,800, these systems deliver exceptionally good value and quality of sound for a school on a budget. I hope this helps give you an idea of what options may work best for your needs! Let me know if you have any other questions.