From the seller:

Professionally maintained and teched prior to shipment. The Soundsphere Q-12A is perfect for high sound pressure levels in gymnasiums, ice rinks, arenas, churches, swimming pools, transportation terminals, factories, open public areas, bars, and nightclubs, as well as applications where clear voice announcements and high-fidelity foreground music are required at high sound levels. Soundsphere®'s Model Q-12A omnidirectional loudspeaker provides a more powerful sound system where clear voice announcements and high-fidelity foreground music at high sound pressure levels are required. The Q-12A loudspeaker provides high sensitivity (97dB 1W/1m) and high SPL capability (121dB 250W/1m), and utilizes our exclusive patent-pending Poly-exponential Incidence Reflector.