SONOS Connect ZP-90 ZonePlayer NO Analog Audio Output. Optical & Digital Out OK | eBay
Sonos CONNECT
Amazon.com: BobWire DAT1 Adds a 12V Trigger! Compatible with SONOS Connect, Echo Link, ChromeCast Audio, TV, Anything with an Optical Audio Out. Auto Power On Amplifiers & Fans. NOT Compatible with AV
Sonos Connect Amp Gen 1 and Sonos Port - Am I doing correctly? : r/sonos
The Sonos Port Isn't Bit Perfect - Bits and Bytes - Audiophile Style