Multi Room Controllers 7inch Video Audio Player Multi Zone power amplifier plate amplifier dsp - AliExpress
How to power a multi-room music system
Power Dynamics PV220BT 2 Zone Multi-room Amplifier with Bluetooth, FM Radio, USB MP3 Player, Microphone Inputs, Home Audio, Office Background Music PA System: Amazon.co.uk: Musical Instruments & DJ
Power Dynamics PV240BT 4 Zone Multi-room Amplifier with Bluetooth, FM Radio, USB MP3 Player, Microphone Inputs, Home Audio, Office Background Music PA System: Amazon.co.uk: Musical Instruments & DJ