RMS: Woofer 15W Satellites 2 x 3W Frequency response: 40Hz - 20KHz Channel crosstalk: >35dB S/N ratio: >70dB Speaker system: 4" woofer on main unit 2 x 2.5" drivers on satellite units Product size Subwoofer: W180 x H200 x D180mm Satellite speaker: W82 x H205 x D90mm Packing size: L520 x W315 x H450mm Packing: 4 sets/carton QTY 20: 1628 sets 40: 3404 sets 40 HQ: 3960 sets