30 watt Bi-directional Loud Speaker Horn with Twin Re-entrant Horns offers high efficiency, excellent intelligibility and sturdy, all metal construction. Includes twin re-entrant horns for bi-directional projection. Features: Rotary switch-selected power taps, Tilt & swivel base for easy aiming, Weatherproof design. Specifications: Power Rating (RMS): 30 watts continuous; 40 watts equalized, Frequency Response: 225Hz to 14kHz, Impedance: 25/70 volts, Sound Pressure Level: 121dB @ four feet on axis with 30 watt; input @ 1000Hz, each horn, Dispersion: 100ยบ each horn, Sensitivity as Microphone: -22dBm [Ref: 10 dynes/cm2], Dimensions: 9-5/8" dia. (each horn) x 12-1/8" D, Finish: Textured mocha enamel, Impedance Selector Switch Settings: 25V @ 15, 7.5, 3.7, 1.8 watts, 70V @ 30, 15, 7.5, 3.7, 1.8 watts.