Yamaha XDA-QS5400RK

Specially designed for custom integration of whole home audio systems, the “QS” (Quad Streamer) provides four zones of audio streaming and eight channels of high-performance audio amplification in an ultra-slim, 1U-high, rack-mountable enclosure. Expandable and extremely flexible, the QS works with the MusicCast multi-room audio system, allowing it to be linked with home theater AV receivers, sound bars and Hi-Fi gear in a wide variety of configurations.

• Designed for custom integration of a MusicCast multi-room audio system connected via Ethernet LAN in a rack or cabinet
• Streams four zones of audio per unit, expandable to 32 zones with simultaneous playback in linked groups of up to 20 zones each
• Eight channels of audiophile-grade Class D amplification assignable to any zone, bridgeable and 4-ohm capable, featuring a unique ground loop/hum-free circuit design
• Built-in Pandora®, Spotify Connect, SiriusXM Internet Radio, TIDAL, Deezer, Napster and more, plus access to music libraries and linked external sources
• Easy control via a free MusicCast app and 3rd-party control systems
• 1U high, rack-wide enclosure; removable rack ears and faceplate included

More information on the manufacturer's website.