I had the opportunity to listen to the MMMicro One yesterday. The little speaker is fairly impressive in many ways. Upon first listen, I was struck by the good imaging and by the speaker's ability to fairly well disappear and throw a wide and reasonably deep stage. This was possibly due to the fact that the ancillary gear was as follows: PS Audio transport, Electrocompanient DAC, Dartzeel preamp and amp and all EVA cabling. So, while we were listening to $2K worth of speaker, we were also listening, by my math, to appx. $60K of other gear.
After a few test discs, I began to hear what i feel could be this speaker's sound. This is where I began to realize that two 4" drivers and a Heil driver have their physical limitations. The 4" drivers are, according to the designer, a combo of ceramic and other damping compound. Problem is that I was hearing a certain amount of glare and for want of a better word 'hard distortion" from these drivers. The ceramic drivers are somewhat known for this coloration and unfortunately, these were really no different. After a while this coloration would be VERY disturbing, IMO. The tweeter was also somewhat 'bright' although I could see it had air, however, at the expense of a seeming 'strain' as the volume increased.
Like many speakers, i think these need an audition in one's own system before a buying commitment. The 'colorations' that i heard may bother others more or less than I, but the question is could one live with these on the long term? Somehow, i don't think they are for me.