Speco 5 x 8 inch weatherproof aluminum PA speaker offers a frequency response of 200 to 15,000 Hz with a 15 watt RMS/25 watt maximum power rating. It features a 110 dB sensitivity and an 8 ohm impedance. An adjustable mounting bracket is included. Technical Specifications Dimensions 5" (H) x 8" (W) x 8" (L) Frequency Response 200-15,000 Hz Impedance 8 Ohm Material Aluminum Max Power 25 Watts Mounting Bracket Included RMS Power 15 Watts Sensitivity (1W/1M) 110 dB