ONKYO TX-SR508. Audio output channels: 7.1, Total Harmonic Distortion (THD): 0.08 %, Signal-to-Noise Ratio (SNR): 106 dB. Headphone connectivity: 3.5 mm. Connectivity technology: Wired. Supported radio bands: FM/AM, AM band range: 522 - 1611 kHz, FM band range: 87.5 - 108 MHz. Power consumption (typical): 450 W