Single driver speakers without the pitfalls?


In researching SET amps, I have learned a lot more about the sort of high efficiency speakers that they are typically paired with, including single driver models like Omega, Blumenstein, Teresonic, etc.
The advantages of these designs are well acknowledged: coherence, imaging, high-efficiency and so forth.
At the same time, there seem to be equally well acknowledged drawbacks to these designs: Limited bass response, rolled off highs, and a harshness or "shout" in the upper midrange.
Some designers, like Tekton and Zu, seem to take the approach of getting the best of all worlds by joining a wide range driver to a tweeter of some sort. (To some extent, my Reference 3AM De Capo monitors take this approach.)
What I'm curious to learn is whether you think there are any single driver, full range systems that transcend the above limitations.
Eager to hear your thoughts.
rebbi
Zus with the latest Radian tweeters are quite an accomplished speaker nowadays. Highs are very natural. With active bass on the Definitions, really an ideal compromise.
How about the Manger drivers? They are pretty unique. Have always wanted to hear but not very commonly found in these parts.
Never liked speakers that used the Manger drivers. They did not seem to integrate well with other drivers.
I have gone part way down the single driver path w a pair of DIY open baffle speakers that I bought from a member here, and I like them very much. They use the Feastrex 5" field coil driver w a whizzer cone, running full range, no x-over. The low bass is provided by 2, 12" subs driven by a 500w plate amp. The mids are to die for and the bass is pretty darn impressive, as well. Of course, I can dial in the bass balance as I please w the attenuators and low pass filter in the sub amps. And you get true stereo subs, to boot.