Yes, plugged into the phone inputs. I tried plugging into aux and turning the turntable's inner phono amp back on but that sounded worse.
I just purchased the marantz amp and had previously used a yamaha RXV665 which did not have phone stage inputs. Had the same issue and thought the phono inputs on the marantz would solve the problem. No doubt it's better but doesn't sound as clear and rich as my itunes through a DAC.
I'll check the stylus. I found on another site that someone said the internal amp on that turntable should be removed because the circuitry is still in play even when switched off. That looks complicated and seems pretty extreme but might try it before buying a separate phono stage amp.
Thanks again for the help.