Altec Lansing FX4021 Powered Audio System. Mid-range driver size: 40 mm. RMS rated power: 46 W, Frequency range: 32 - 20000 Hz, Signal-to-Noise Ratio (SNR): 85 dB. Type: Floor-standing speakers, Audio output channels: 2.1, Subwoofer dimensions (WxHxD): 215 x 215 x 345 mm