Turntable hissing


I have a VPI classic that hisses (or buzz) when I play it.  I am using a McIntosh 7200; the ground is properly connected both to the turntable and amp, and not sure what else to do.  Any thoughts or experience remedying this issue?  

petar3

Hiss is likely RFI, not a grouding problem per se.  Viridian's idea to short the unused inputs is worth a try.  But what the OP described as a hiss is later referred to by others as a buzz.