humming

Hello Everyone! I bought my first turntable a couple years ago because i already collected vinyl as art and wanted to listen to them later. now i'm getting more serious with good sound quality and bought myself a Sansui qrx-3000 reciever. it looks absolutely stunning and sounds a lot better...

I have an Audio technica turntable with line outs and an earth lead. The system works with powered speakers (Azatom equinox) but there is no where to connect the earth lead to the speakers. How to do I get rid of the humming when activating the turntable with stylus arm? Can I earth another way...