https://usa.yamaha.com/products/audio_visual/multi-room_amplifiers/xda-qs5400rk/specs.html
XDA-QS5400RK MusicCast Multi-room Amp Specs- Yamaha USA
Specs for Yamaha multi-room streaming amplifier with four zones of audio streaming and eight channels of high-performance audio amplification.
multi roomxdamusiccastampspecs
https://usa.yamaha.com/products/audio_visual/multi-room_amplifiers/xda-qs5400rk/downloads.html
XDA-QS5400RK MusicCast Amp Support - Yamaha USA
Support for Yamaha multi-room streaming amplifier with four zones of audio streaming and eight channels of high-performance audio amplification.
amp supportxdamusiccastyamahausa