Samsung S2-300B, 2.1 channels, 5.5 W, Black, 11 W, 4 Ω, 6 Ω Samsung S2-300B. Audio output channels: 2.1 channels, RMS rated power: 5.5 W, Product color: Black. Satellite speaker impedance: 4 Ω. Subwoofer impedance: 6 Ω, Subwoofer driver diameter (imperial): 4", Subwoofer dimensions (WxHxD): 5.2 x 7.95 x 7.48" (132 x 202 x 190 mm). Weight: 4.83 lbs (2.19 kg). Headphone connectivity: 3.5 mm