Manger Audio Loudspeakers. Has anyone listened to these?

@larryi , I never heard of AER either. The BD 3 is quite a driver judging by their specs. 106 dB/watt/meter is pretty sick. Take the low bass out of it and you could probably drive it with a 12AX7. $8000/pr is on the steep side though. It seems the Germans really like full range speakers.
I am not crazy about horn loading them. I would prefer crossing to a sub at 100 Hz which will lower distortion and increase overhead. The difference in efficiency can be managed with an input level control on the sub amplifier. The 15 Class A watts you would get out of the Pass Amp Camp amp would make a 777 sound quiet. 

The Charney back-loaded horn is quite a pleasant surprise.  It is a very complete sounding speaker that does not have the midrange peakiness and roughness common to most full-range systems.  I have not heard it with a subwoofer, but, I bet it would work well with a sub kicking in below 100 hz.  

Yes, the AER BD series is quite expensive.  They have a BD 5 which is not even mentioned on their website and I bet it is incredibly expensive.  

I used to be one of the very few dealers of Manger in the U.S. many years ago. Their uniqueness was attractive but I never got behind selling them. Did not care for the sound. Did not think they were very musical.

Something for thought; - - - -  regardless of how the sound quality is perceived by a given listener, and regardless of the fact the it will undoubtedly need a sub-woofer, which is not unusual, pertaining to many speaker designs being offered on the market today, my real concern here would be, availability of dealership interaction, if needed. I may have missed something, but I can only determine (1) US based dealer. That fact alone has sent me in the opposite direction from considering several speaker designs that are quite credible sounding. I certainly don't want to have to factor in accessibility and credibility of a dealer along with a somewhat obscure design/manufacturer of speakers. I had a problem with a very finely reviewed OPERA speaker, some years ago. Very scant representation in the USA at that time. It took many months to resolve the issue, having to deal with a manufacturer in Italy. Just something to think about before " jumping off this particular bridge".  GOOD LUCK ANYHOW.

axpert, I totally understand your apprehension. I feel very much the same way. People have been messing with speakers for over 100 years and there is nothing mysterious about the engineering. New materials and CAD have improved the engineering but products that go off the beaten track should always be suspect and treated with a degree of caution. Thus, my inquiry about the Manger. It is a very different approach and I am not hearing a lot to recommend it although it is rather rare in this country.
full range drivers have several advantages. They are a perfect point source. They can be made to be directive without beaming. They are phase coherent. The big "but" is that as soon as you ask them to make low bass you force them into making long excursions which force the suspension into the non-linear portion of the range increasing IM distortion and you add doppler distortion on top of that. Pull the deep bass out and you have a remarkably different situation. The same mistake is made trying to make ESL do bass. They can do it but the penalty is very high if you like to listen at realistic levels and I do not mean Rock stadium levels. I mean jazz and symphony orchestra levels.
Ths became obvious to me back in 1978 when I started in with Acoustat Model X's. They made wonderful bass as long as you did not take it up over 80 dB. Then they started farting all over the place. Randy Hooker had just come along with his Helmholz resonating subwoofers. A pair of those with a Dalquist Crossover and two Kenwood LO7M amplifiers gave you state of the art bass of the day and let the Acoustats do what they do best unhindered. I have not changed my approach in over 40 years.
I have never tried it in the context of a small, very efficient full range driver
but I can not see why it would not work wonderfully. It will give you a smaller image but would fit much better in smaller rooms than honking huge ESLs and would cast a lot less. Building a SOTA system for less than $10K for the preamp, amps and speakers would be quite a stunt.