I have a Fluance turntable connected to a Fluance preamp to a Play 5. When both input cables are plugged into the preamp, the sound quality is horrible - we can’t hear vocals at all. When we unplug either the red or the white input cables on the preamp, the sound quality improves but we’re missing a lot of base and it’s a little hollow.
We’ve changed the RCA cables and I’m going to try a different preamp. We’ve also changed the line level on the Sonos app and it didn’t help significantly. Any other suggestions??