- Aug 10, 2019
I've just noticed that my new PM6004 has a hum on the phono input. The amp is just over a week old and is connected to an RP1. It is quite noticeable at any volume above '9-o'clock', even when the RP1 is off. When I unplug the inputs from the back completely, it is slightly better with just the left and much worse with just the right. With normal music it's not noticeable however on soft music of in between tracks at normal listening levels it's quite noticeable. Has anyone experienced this before, and is it likely to be the Marantz or the RP1?