Philips HTS5120/12, 5.1 channels, 400 W, 65 dB, Active subwoofer, 35 - 200 Hz, 8 Ω Philips HTS5120/12. Audio output channels: 5.1 channels, RMS rated power: 400 W. Signal-to-Noise Ratio (SNR): 65 dB. Subwoofer type: Active subwoofer, Subwoofer frequency range: 35 - 200 Hz, Subwoofer impedance: 8 Ω. Product color: Black. Power consumption (typical): 35 W, Power consumption (standby): 1 W, Power requirements: 100-240 VAC, 50/60 Hz