Actually you could look at the cartridge dynamic compliance (nagaoka and hana are on the low side) and then check for rega effective moving mass. Then look here.
Japanese cartridge manufacturers never use 10Hz to measure dynamic compliance, they use 100Hz. All you need is to multiply on 1.7 to convert it to 10Hz (then read Ortofon page again).
Japanese cartridge manufacturers never use 10Hz to measure dynamic compliance, they use 100Hz. All you need is to multiply on 1.7 to convert it to 10Hz (then read Ortofon page again).