I recently had the opportunity to hear the nCore amps as I was building a pair for a friend. I got to listen with about 3 days of use on the amps, so I limit my comments to understanding that they will sound somewhat different with more comprehensive break in:
The good: exceptionally low noise floor, and state of the art detail retrieval, good dynamics, and excellent bass resonse and control.
The questionable: high frequencies just do not seem to be totally fleshed out: that is, things likes bells, cymbals, and chimes seem to have a bit truncated decays, missing the full harmonic envelope.
My impression is that something is actually missing from the output of the nCore, something which is present at the input, and is not the result of distortion in other amplifiers. Does anyone else notice this quality?
My amplifier for reference is a Pass X150.5.
Despite my reservations, I do think the nCores are exceptional in many ways, and I am interested enough in them that I would like to build up a stereo version for my own use and further evaluation. But, I was not "blown away" as many people seem to be, at least not enough to sell my Pass in order to fund a top level nCore build.