The Speco 8" weatherproof PA speaker has a 70/25 volt line transformer. Its 25 volt line wattage taps for 15, 10, and 3.7 watts. It offers 70 volt line wattage taps for 15, 10, 5, 3, and 1 watts. It features a frequency response of 250 to 15 kHz with a power of 15 watt nom/30 watt maximum. Mounting bracket is included.