8'' subwoofer with 150 W power. Since all TS subwoofers have a passive radiator. Your system will sound as a whole, not just a sum of parts. Every ThunderStorm subwoofer has detailed controls like switchable satellite filters (full range and 80 Hz), phase switch controls (0°, 180°). and variable subwoofer filter frequencies (60 Hz - 140 Hz) to let you tailor and adjust your ThunderStorm to your specific room. Frequency range: 33 Hz - 300 Hz. Max. SPL: 105 dB / 1 m. Dimensions: 280 x 415 x 365 mm. Weight: 11,5 kg.