Dear Ruben1: Your phono stage is a MM/MI design not for MC cartridges. Maybe it can handle the 0.5mv HMC30 cartridge but the problem is like you said the load impedance.
You can always make a change at the input of that PS with a different resistor value but I can't be sure because I don't know the electronics design but any " decent " technician can help you.
IMHO this option is a lot better that any SUT for that Ortofon cartridge.
One thing hat worried me is that very high output impedance in that unit because affect/degrade the cartridge signal.
Maybe you coud want a new phonolinepreamp as a serious option.
Regards and enjoy the music,
R.
You can always make a change at the input of that PS with a different resistor value but I can't be sure because I don't know the electronics design but any " decent " technician can help you.
IMHO this option is a lot better that any SUT for that Ortofon cartridge.
One thing hat worried me is that very high output impedance in that unit because affect/degrade the cartridge signal.
Maybe you coud want a new phonolinepreamp as a serious option.
Regards and enjoy the music,
R.