I trust my own ears fine and as I have said I an very happy with the amps. However it is not ideal for resale value (if and when that happens) to have a relatively unknown and un-reviewed product and it is not ideal for the company to have such an excellent product as the Ref 20 that few people have even heard of.
I very much respected and enjoyed the mature Ref 9 (V2 and V3 SE amps) once all their requirements of mass loading, and isolation were honored. But in the Reference 20 you have a real giant killer in terms of size, looks, price, energy and space efficiency, but most of all in sound quality that myself and friends feel meets and beats many of the most respected and touted Class A and A/B designs, tubed and solid state, selling at multiples of the Ref 20 price, plus all class D we have heard - in bass dynamics and articulation, quiet backgrounds, ease and fluidity, richness and weight in the midrange, a natural detailed treble without etch or whiteness, lightning dynamics and, with the Ref 20 power and finesse to boot.
I was talking to a respected and open minded speaker designer the other day and mentioned the Ref 20's - he said that his team still has not heard a Class D that did not thin out the mid-range and distort the treble. Nuprime needs to get the word out so that he and many others like him can be motivated to take a listen and discover what they have been missing. I'll bet that if they heard what Nuprime Ref 20's could do, they would love to not have to lug the current 100 lbs behemoth amps to all the shows they present at each year.
I think it should be fairly simple to get TAS to do an update to the 2011 Chris Martens Review of the Ref 18 since it been four years, and they have listed the Ref 18 repeatedly as a Editor's Choice. Also Ed Kramer of Six Moons has followed the progression of the Nuforce amps since at least the Ref 9 V3 and I think would be interested in refreshing his review of the Ref18, also from 2011. The Tweek Geek and Stereo Times have also weighed in in the past. Review of the Ref 20 would also be an opportunity to make the shift from Nuforce to Nuprime more widely known and understood. The context for such a review as changed considerably since 2011, now that many companies such as MBL and Rowland have put out Class D type designs that have won accolades.