The 3070S subwoofer is a great match for all Q Acoustics 3000 and 2000i series stereo and centre channel speakers. The Q Acoustics 3070S subwoofer’s dual, long-throw, 612 inch drive units and powerful 140watts rms amplifier can reproduce the fast ‘twang’ of a double bass just as well as thrilling movie soundtracks. 2 x 170mm Bass Units, 140W rms Amplified Power, 50Hz – 150Hz (variable) Crossover Frequency, Ported Enclosure