Description RX-A8A   A2A A4A A6A A8A Channels 7ch 7ch 9ch 11ch Rated Output Power (20Hz-20kHz, 2ch driven) @ 8ohms 100W 110W 150W 150W Zone Zone2 Zone2 Zone3 Zone3 HDMI in/out 7/1 7/3 7/3 7/3 8K60Hz/4K120Hz, HDR10 (via firmware update) ● (8K60B, 4K120AB) ● ● ● Dolby Atmos w/Height Virturalizer ● (via firmware update) ● ● ● SURROUND:AI ─ ● ● ● Wireless Rear Speaker Capability ● ● ● ● YPAO ● (R.S.C/Multi-point) ● (3D/High Precision EQ/ R.S.C/Multi-point) ● (3D/High Precision EQ/ R.S.C/Multi-point) ● (3D/High Precision EQ/ R.S.C/Multi-point) Also compatible with a NS-NSW100 (MusicCast Sub 100) wireless subwoofer. Available now as a free firmware and app update, the new functionality supports all four current AVENTAGE models—RX-A8A, RX-A6A, RX-A4A and RX-A2A. When connected to a Sonos Port, users can power on their Yamaha receiver, switch to the correct input, and control volume directly from the Sonos app—making for a more unified home audio experience.