MBL omnidirectional speakers. How do they sound ?


Please share your experience, whether you only heard them somewhere or have them in your system. And associated electronics. Also, how do they sound with tubes or hybrids ? Where do they stand compared to other top speakers like Lansche, Venture, JM Labs Grand Utopia, Rockport, big horns etc. ?
Not thinking of getting them anytime soon if ever, simply interested in people's impressions.
inna
Post removed 
Huge and powerful. You really need to hear them to fully appreciate. I have only heard them with MBL electronics. They require lots of power and current.
I heard them in an all MBL system and with Macintosh components...detailed, but in my opinion a little bit bright 
The best system that I've ever heard, (and I've heard many, many, many systems) was the MBL Master Reference System.

Granted at $500K it should be good, but this was just unbelievable and truly a reference.  I will never forget it.
The MBL may be the single most difficult loudspeaker system in the world to set up correctly. I've heard them in Vegas (where rooms are always questionable) sounding both great and mediocre. Then I heard them in Munich in a room suited for them and they were nothing short of astonishing. rcprince pointed out a 'boomy bass'. That can definitely happen, hence the great variablity in their sound. If you room will accommodate them is a real question. In and of themselves, they are wonderful, Highly Reccommended from me. Electronic choice will be critical.