12'' subwoofer with 400 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: 24 Hz - 300 Hz. Max. SPL: 112 dB / 1 m. Dimensions: 390 x 560 x 508 mm. Weight: 25,5 kg.