I assumed the ZP90 had a pair of stereo line out connectors but on closer inspection it is line/ground for line out, and line/ground for line in.
I was planning to use an older amp with analogue line-level connections so the coax & optical links won't work for me.

Is it mono-only on the phonos? Or effectively mono if the L/R channels are merged onto one set of connectors?


p.s. if you can't reply on the directly forum, please send me a PM as that part still works...

sonos zp90 rear.jpg