Pioneer S-A4SPT-VP. Woofer: 10 cm. RMS rated power: 100 W, Frequency range: 50 - 40000 Hz, Impedance: 6 Ом. Weight: 3.7 kg. Type: Floor-standing speakers, Dimensions (WxDxH): 154 x 213 x 246 mm, Audio output channels: 2.0