High-Efficiency Single Driver Speaker System

There are lots of full range speakers with high efficiency. 90-100.

 Designing a single-driver speaker is very difficult since that driver needs to cover the entire frequency band. i stating that one problem with such speakers is that they perform poorly at the frequency spectrum’s upper and lower ends.   My company Bacheaudio  further stated that he tried adding a tweeter to his early speaker models, but got poor top-end results. we also tried pairing the speakers with subwoofers, but found that a suck out in the upper bass to middle-midrange region of about 100 to 500Hz caused voices and instruments such as piano and cello to sound thin.

 

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. we states that this hybrid design incorporates the best attributes of the one-way designs (exceptional dynamics and coherence) and their three-way counterparts (excellent frequency extension and dispersion characteristics and the ability to play loudly without distorting).

 

You might also try posting your question over in the cube audio thread...  https://forum.audiogon.com/discussions/cube-audio-nenuphar-single-driver-speaker-10-inch-tqwt-enclos...