Philips SoundBar Home cinema speakers CSS2123/F7, 2.1 channels, 60 W, 30 W, 4 Ω, 1.5", 5" Philips SoundBar Home cinema speakers CSS2123/F7. Audio output channels: 2.1 channels, RMS rated power: 60 W. Soundbar speaker RMS power: 30 W, Impedance: 4 Ω, Tweeter diameter (imperial): 1.5". Subwoofer type: Passive subwoofer, Subwoofer RMS power: 30 W, Subwoofer frequency range: 20 - 150 Hz. Product color: Black. Connectivity technology: Wired