If you look at the Dynavector website the spec for the cartridge is 5 ohms internal resistance and the sheet on the P75 indicates that cartridges in the 4 to 10 ohm range should use the Low setting in the Phono enhancer mode. I would also try the manual settings as well. I have a 20XH that reveals huge changes when the loading is changed.
HTH
Mike
HTH
Mike