Cambridge Audio MINX X201 CA609 Active Subwoofer with 200W Enough to add a rich, deep bass to smaller and medium sized spaces – such as home offices Specifications: Construction type: 1 x 6.5" subwoofer 2 x 6.5" passive radiator; Frequency range: 36 – 200 Hz; Frequency tolerance: +/-6 dB; Crossover: 50 - 200