I get occasional crackling noise in the right rear channel. It´s not the speaker and the noise is there on all inputs. The very odd thing is that it doesn´t seem to be linear with the volume level.

Hello, can any techno wiz help? I have an Aiwa PXE855 turntable (with the equalizer amp switch set to ON)plugged through a Cambridge audio pre amp 540p (into the MM input)into my Cambridge audio amp ...