I’m now to the point, with enough time on the amp, that I’m starting to do proper, focused, review/audition-style listening via the Jotunheim R.
It will be very interesting to see how far it scales, in critical comparison, vs. some of the even more expensive amplifiers I have around, vs. the stuff I think it is already clearly ahead of. Removing the interface box and additional cabling seems to pay dividends beyond just the performance of the amp.
Another obvious benefit at this time is down to the thermals of the unit.
The actual operating temperature is notably lower than with the Vidar, and that’s running at rather spirited levels (you wouldn’t listen at those volumes for very long) and, of course, there’s a lot less heat* being output here vs. Vidar too. Temperature is closer to, but still lower than, twin-Vidars as well. So no worries about running a Jotunheim R in the summer!
*Temperature and heat are not the same thing - thus two different things/masses can be at the same temperature and have very different effects on their surroundings.