Phono card NAC 72 - Grado F3+ Moving Iron Cartridge

I wonder if I have the proper phono card. What is the phono card number I should have for a moving iron cartridge with my NAC 72 ?

You need NA322 MM cards.


I Googled these cards out of interest. Prices range from around £15 to £120. I wonder why there’s such a wide variation?

(I suppose that the boards are no longer manufactured, so prices will inevitably start creeping up.)