While Cardas makes excellent products, I’ve owned them. Their cable has Multi-stranded Litz conductors, with strand size varying in Golden Ratio steps.
The Naim forum moderator states: While Naim amps of recent years are very robust, for best performance Litz type speaker cables in particular should be avoided with Naim. You want a cable with low capacitance and moderately high inductance - Litz cables usually give you the opposite to this.
I've used Wireworld Eclipse 7 with their custom made inductor with great results. In addition, Naim's NAC A5 is a very capable cable as well.
All the best
N