I have just created a music room to enable me to listen to Sonos - via Sonoa Amp or a Cyrus system to play CD’s to the same speakers, connected to a speaker switch. After connecting up with the switch connected to Sonos I can start to play music but as soon a I increase the volume the sound stops and the Amp shows a flashing red light.

I have now seen some posts around this subject and looking for advice - I just bought a relatively cheap (non powered) speak switch on Amazon.

Any advice greatefully received