... : conference room, theater, church, club etc. long range speaker, dual 15 inch speaker,sound system for hall.1. PS-25 is 2 ... high efficiency passive mutifunctional long range speaker.. 2. As the speaker is unique enclosures design. The speaker inside enclosures with two 15" low ... speaker and one 3" titanium driver, 2-way full range frequency response.3. It cans high efficiency soft and clean ...