Logitech LABTEC Pulse 385, 2.1 channels, 10 W, Black, 20 W, 10%, 72 dB Logitech LABTEC Pulse 385. Audio output channels: 2.1 channels, RMS rated power: 10 W, Product colour: Black. Total Harmonic Distortion (THD): 10%, Signal-to-Noise Ratio (SNR): 72 dB. Satellite speakers RMS power: 4 W, Satellite speaker frequency range: 55 - 20000 Hz. Subwoofer RMS power: 6 W, Subwoofer driver diameter (imperial): 10,2 cm (4"), Subwoofer dimensions (WxHxD): 146 x 210 x 203 mm. Connectivity technology: Wired