Points taken, however, it would appear that, in Naim's case, they wished to ensure that cable inductance fell not much lower than 4uH (see Arkless' "3-6 Ohms ish in line at 50KHz", above), and parallel capacitance didn't much exceed 320pF. This based upon the published specifications, and minimum and maximum recommended lengths of the cables that they supplied/recommended; these in addition to the late MD's comments on the subject via his company forum and via occasional interviews.
Obviously, many thousands of Naim, Exposure and NVA customers have existed over the years, I doubt that many weren't made aware of the loudspeaker cable requirements at time of purchase. I've also never heard tell of a Naim amp that actually succumbed to incorrect cable choice, however, I've seen a few that were killed by errant shorting of outputs (in fact, I have one here). Perhaps we should all be naming and shaming those designs that aren't fully protected against dead shorts? Maybe
@Arkless Electronics would like to cast the first stone here?
Regardless, my offer stands to run the specs of any alternative cables that Naim owners wish to consider. As
@Gervais Cote found, the difference could be down to one's amp running circa 8ºC more than is typical. Those alternative cable users that prefer to run their's 24/7 should really consider having a closer look.