I have a Technics SL-1700MK2 turntable that is running to a Rolls VP29 Pre-amp to a Sonos Connect and then to a Sonos Beam. When I first set it up, without the pre-amp, the sound was very quiet and I had to have the Sonos volume all the way up just to hear anything. Then I added the pre-amp and it was fine. But soemtime recently it developed the same problem. I even sent the pre-amp back to Rolls under a warranty repalcement in case that was the issue. They returned me a brand new one but it’s still very quiet. If I turn the Sonos volume all the way up and sit right next to the speaker I can hear it, but that’s it. Any ideas?