Scott, if I can jump in here. My Europa's are being powered by (as a second amp) vintage/updated Heathkit A-9c integrated monoblocks with 20 wpc in a 17x18x11 room. The Heathkit would not of course compete with the Cayin. Nonetheless, there is plenty of power. Typical full sound listening level is volume set at 12. The most I can stand is volume at 1. Even 20 watts of PP tubes is enough, I believe.
Monte
Monte