Hi Morricab,
What are the drawbacks single driver designs?
Thanks
Well, you have probably heard most of them already: lack of deep bass (or any bass at all in some cases), can be shouty because of elevated and usually somewhat ragged frequency response, tonally thin and/or skewed timbre (because of the combination of the two things above), can get a bit confused sounding with complex music (more expensive drivers seem to be less susceptible to this from what I have heard.
For conventional box speaker guys, most, if not all the flaws result in a sound that deviates too far from "neutral" for their tastes. What they fail to realize is that their speakers are just as flawed in the time/dynamics domain in the pursuit of getting the frequency domain correct. Very few speakers do a reasonable job in both domains. I think this is a main reason for the polarity in speaker preferences.
The HDTs I have are quite livable with these flaws audible but not terrible. The tendency to shout is less than I have heard from most (only the expensive Voxativ models are maybe better) and due to a very complex cabinet tuning there is usable bass to around 40hz with a full mid-bass so they don't sound (too) thin. I use them primarily as late night, low volume speakers, where they have superb resolution and musical qualities at levels that I think a lot of the WBFers would consider a whisper. Turn them up to rockin levels and they can start to pierce though.
I have owned one full-range, single driver speaker that was really truly great and that was a full-range electrostatic speaker. It had multiple flat panels but they all operated over the same full-range and that speaker covered <30Hz to 20Khz in a very smooth even FR and was also time correct...only large macro dynamics tripped it up a bit. The sensitivity also wasn't the greatest but its ability to resolve microdynamics made playing loud unnecessary.
It took me a long time to find a domestic friendly sized speaker that captured most of what those big electrostats have but also has big dynamic wallop. Of course my wife thinks it is still too big
. From what I heard years ago from a Horning, I think they could also be something that would really work well in a still doemestic friendly sized speaker.