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The SPT30A from Bogen is a 30W 25/70V Reentrant Horn Loudspeaker ideal for one-way and talk-back applications in industrial plants, warehouses, schools, construction sites, transportation terminals, and recreational areas. This sturdy, weatherproof speaker has an all-metal construction and uses screw terminals for a simple installation. The SPT30A is easy to install and easy to maintain, with its self-aligning, field replaceable diaphragm.