4" X 6" Weatherproof PA Speaker 4 x 6 inch ABS plastic PA speaker is weatherproof. It offers a frequency response of 200 to 15,000 Hz with a 15 watt nom/30 watt maximum power rating. It features a 10 dB sensitivity and an 8 ohm impedance. Adjustable mounting bracket is included. Technical Specifications Dimensions: 4" (H) x 6" (W) Frequency Response: 200-15,000 Hz. Impedance: 8 Ohm Material: White ABS Plastic Max Power: 30 Watts Mounting Bracket: White ABS Plastic Base RMS Power: 15 Watts Sensitivity @ 1W/1M: 10 dB