Perfect for signaling and paging, this high efficiency horn features 250Hz~16KHz frequency response, 30W/60W nominal/max power capacity, and 120dB/4V/1M sensitivity. Compatible with 25V or 70V line input, built-in rotary switch selects the following transformer taps: 70V: 1W, 3W, 5W, 10W, 15W and 30W 25V: 0.1W, 0.4W, 0.6W, 1.3W, 1.9W, 3.7W, 10W, 15W and 30W. Note: Not for 8ohm use. Dimensions: 8" (H) x 11" (W) x 101/4" (D).