Single driver vs traditional 3 way loudspeakers

@bache wrote: " What Bache audio ultimately gravitated towards was the so-called “augmented wide-band” (AWB) speaker, which uses a single wide-band driver that covers a large portion of the audible frequency band accompanied by several of what he calls “helper” drivers, in this case a super tweeter and one or more woofers. " 

I have neither affiliation nor experience with Bache loudspeakers, but imo they are making excellent design choices.

Duke

In my opinion a good "fullrange" driver can do many things well, but the frequency extremes are generally not among them.  I'd be inclined to keep bass frequencies out of it and use a dedicated woofer, and to add a tweeter to improve the top-end dispersion (and extension if needed).   

There's a speaker company in New York that does this.  I think their name is Bache Audio, or something like that. 

;^) 

My first commercial effort fifteen years ago was almost that (6" Fostex + powered bass section + tweeter), but I made the fatal mistake of not high-pass-filtering the "fullrange" driver.   Might give it another go some day.  

The best single-driver, truly fullrange speakers I've heard are the big SoundLab electrostats. 

Duke  
disclaimer: I'm a SoundLab dealer