Single driver speakers. Are they worth considering ?

I recently rebuilt a pair of Ohm Walsh F single driver, no crossover-full range speakers. Favorite speaker by far out of the many I have listened to though I don't have much experience with super high end stuff. Seems like one would classify it as full-range as it is a single cone with single magnet. Plays frighteningly low with crystalline highs (or whatever descriptive crap you want to use). Soundstage is deeper and revealing to the point where it seems almost like a disney illusion. 
Of course only sounds really good when 6 feet into the room so can only listen when my wife is gone (which isn't much these days).

For fun I bought a pair of Audio Nirvana Classic 8 Neodynium drivers and built the recommended enclosure for them. A pretty simple project that yielded results that were much better than I expected. I listen to them quite often when I'm working in my shop and power them with a pair of Pass ACA amps that I built. I was once a single driver skeptic, but not any more.

Great thread.  I'm looking forward to hearing about more user experiences with different brands/approaches.

Evolution and progression does occur.  Someone's experience with a Lowther single driver speaker has little to do with hearing a Nenuphar or Charney. Faulty extrapolation. 
Charles 

I think you'd be better off with a Woofer-Assisted Wide Band (WAWB). 

It's like a full range, but with a woofer added.  One driver handles 300Hz to 20 kHz.  The big advantage is the crossover stays out of all the delicate areas, and from 300Hz upwards you have a point source.  Obviously plenty of cons to this as well.

I suggest if you want to try this out look into a Madisound kit.  They even h ave them for desktops.

Best,

Erik