I have an A85 with the optional MM/MC phono stage fitted. I have recently started using an MC stage but there is too much hum even at middle volume levels. My turntable is Project RPM9 with Ortofon Kontrapunkt A and interconnects are VDH MC 501 silver pair. I have tried with different interconnects but no change. The hum noise is still there even without any connection. When I switch it to MM section there is no hum at all. Has anyone had any similar problems? Is this the characteristic of Arcam phono stage or I have a faulty one? Many thanks in advance for any help.