... . PS-25 long range speaker, dual 15 inch speaker,sound system for hall. 2. Usage: conference room, theater, church, club etc ... speaker, dual 15 inch speaker,sound system for hall.1. PS-25 is 2-way system unique enclosures design high efficiency passive ... high efficiency soft and clean sound, with the intensity lower frequency impression system sound. The horn sound coverage angle is 80°x ...