buzzing sound

Hello, I noticed buzzing sound problem at my new Focal Chora 826 tweeters with new Marantz NR1609 receiver. I heard that when I listened piano tracks on both speakers. I tried to play piano tracks with AirPlay (16bit 44.1kHz), S/PDIF (24bit 192kHz). I tried with Pure Direct mode, but same...

Hi guys :) So I have the Planar 1 from Rega. With my speakers turned on I can hear a buzzing sound, and I have figured that it might be because I don't have ground connection. I've spoken with the man from my local Hi-Fi-store and he told me the same thing. The problem is that i really can't...