The Bogen SPT5A is a compact reflex horn-type loudspeakers designed for one-way or two-way sound and communications systems.Their wide frequency response assures full-range background music reproduction making these loudspeakers an excellent choice for multi-purpose applications indoor or outdoor for use in industrial plants warehouses schools construction sites transportation terminals and recreational areas.The SPT5A has a built-in variable impedance selector switch for matching the speaker power requirements to a 25V or 70V constant-voltage line. The loudspeakers measure 6'' in diameter and 4'' deep. Connections are made through a 12'' connecting cable.High intelligibility and efficiency.Passive loudspeaker.Ideal for both one-way and two-way applications.7.5 watts.25/70V or 8-ohm operation.Variable-tap impedance selector on SPT5A.All-purpose mounting bracket for precise positioning both vertically and horizontally.Weatherproof all-metal construction.Textured mocha enamel finish.