do they sound as good as the mch 30? Are they musical?
I'm not sure which model you are asking about. NuFORCE made an MCH-300SE and NuPRIME made an MCH K-38. Both were exceptional amps and often ignored as Musical Amps, but both were incredible in that aspect, especially the K38.
The MCX Series is an upgrade performance wise and sonically to both of those amps.
Here is a link to our New Zealand dealers evaluation of the MCX Series, which he has detailed information on them. You may find his detailed evaluation helpful.
He has evaluated the MCX-1 and the MCX-2, but the sonic character of the complete series is the same, with the main differences being in power/watts of each channel.
https://totallywired.nz/nuprime-2/nuprime-x-mcx-2-stereo-power-amplifier/