Airplay 2: multiroom and multi-user - Son-Vidéo.com: blog
Multi-Room Audio Setup with Arylic AirPlay 2 Amplifier H50
iOS 11.4 brings stereo pairs and multi-room audio with AirPlay 2 - Apple
A50+ : Best 50W*2 Streaming Amplifier Under $200 - Arylic.
Airplay 2: What you need to know - FlatpanelsHD
What is AirPlay 2? Everything you need to know about Apple's media-sharing feature - CNET
AirPlay 2: Apple's new multi-room audio system explained - Gearbrain
Create a Multi-Room Wireless Speaker System with Apple Airport Express and AirPlay on Island in the Net
AirPlay 2: Apple's new multi-room audio system explained - Gearbrain
Airplay 2: multiroom and multi-user - Son-Vidéo.com: blog
This Sonos System Is the Easiest, Best-Sounding Way to Enjoy Music at Home