You have to check the manual for MM cartridge where you will see operation conditions such as load resistance of the phono stage (in Ohms), overall phono cable capacity (in pF) from your cartridge to the phono stage.
Looking at phono cable manual you can find specs in pF (cable capacity).
Cable length will change cable capacity (not RCA connectors). High quality modern phono cables are low capacitance. For example if you will look at the specs for Zu Audio phono cable here you will see “Cp ~94pF”
Looking at phono cable manual you can find specs in pF (cable capacity).
Cable length will change cable capacity (not RCA connectors). High quality modern phono cables are low capacitance. For example if you will look at the specs for Zu Audio phono cable here you will see “Cp ~94pF”