Bose Professional FreeSpace 3-II Flush Mt Bass B, Installation Subwoofer, Suitable for restaurants, hotel business, retail stores, Impedance: 6 Ohm Mono direct, Rated power: 100W, Frequency response: 50 - 230 Hz, Max. SPL: 96 dB, 40 Hz High-Pass filter, For installation 70/100 V, 391 mm Outer flange diameter, 362 mm Diameter of the top opening, 189 mm Housing height, Weight: 6.4 kg, Colour: Black