This is the 2-way Sonodyne ported speaker that has been designed to be of an elegant design enabling you to enhance your audio experience without the need to carry a lot of weight. The fuller, more dynamic sound is provided by the dual 3″ woofers, and crisp and detailed highs are provided by the 0.5″ polycone tweeter. Its frequency response of 100Hz20kHz, 90dB sensitivity, and 8 Ohm impedance are very efficient and compatible with 40120W amplifiers. With 3.5kHz crossover, it has balanced and room-filling sound in a sleek ABS enclosure that has a versatile wall-mounting.