Sonos discontinued the Play:3 — a Goldilocks speaker between the Play:1 and Play:5 — you might see Play:3 speakers online, ...

It’s so easy. The Five (and Play:5 before it) is the only Sonos speaker with a 3.5mm line-in port, so you need an RCA to 3.5mm cable (like this) to hook it up directly to your turntable.