Love the concept. The coaxial aspect works as advertised -- wide sound-field. Nice coverage of low-mids to highs. Would have been a perfect purchase (esp. given price) except … these have a very noticeable white-noise "hiss" at every point in the volume control -- and particularly at the 12-o'clock setting (which is where they balance out best with subs in my room).
Thought it was manufacturing error, so got a second pair, they had the exact same behavior. Tried them connected to audio, disconnected, and on different power sources --- same every time. Definitely a design issue (not mfg issue).
When audio is driving them -- sound is fantastic. But when audio is quiet, the hiss is unacceptable. I put them right up next to a pair of KRK's connected to the exact same audio and power source as well --- KRK's were dead quiet with no audio. MP's had the hiss.
These need a second generation re-design where they fix that and then I'm going to buy and keep a pair for sure.