• 9-channel amplifier • 150 watts per channel into 8 ohms (20-20,000 Hz) at 0.06% THD, with 2 channels driven • high slew rate design for clear, consistent performance across a wide frequency range • Dolby® and DTS® surround sound decoding • Cinema DSP HD3 adds richness and depth to music and movie soundtracks • Cinema DSP HD3 adds richness and depth to music and movie soundtracks • Surround:AI™ technology analyzes your content and creates optimal surround effects in real time • H-shaped cross frame adds additional stability to the chassis while reducing vibrations • YPAO (Yamaha Parametric Room Acoustic Optimizer) automatic speaker calibration Digital Streaming Options - • Built-in dual-band Wi-Fi for listening to music from a networked PC, free internet radio, and music services • Works with Amazon Alexa and Google Assistant voice control devices • Apple AirPlay 2 lets you stream directly from an iPhone® or iPad® and ask Siri to play Apple Music® • Built-in Bluetooth for wireless music listening with smartphones, tablets, and compatible computers