50 W/Ch (8 Ohms, 20 Hz-20 kHz, 0.08%THD, 2 Channels Driven, FTC);WRAT (Wide Range Amplifier Technology);5 Analog Audio Inputs and 1 Output, including Phono Input for Turntable Connection;Massive EI Transformer. Compatible with the DS-A5 AirPlay RI Dock for iPod/iPhone/iPad;It's not a surround sound stereo.