RMS: Woofer: 1 x 20W Satellite: 5 x 3W Frequency response: 30Hz - 20kHz Channel crosstalk: >50dB S/N ratio: >70dB Speaker system: 4" woofer on main unit 5 x 2.25" drivers on satellite units Product size: Subwoofer: W130 x H250 x D280mm Satellite speaker: W90 x H102 x D90mm Packing size: L705 x W368 x H590mm Packing: 4 sets/carton QTY 20: 768 sets 40: 1632 sets 40 HQ: 1768 sets