"Single driver" speakers are rarely full-range: it's (as yet) impossible for a single transducer to reproduce 20-20kHz. HOWEVER, the reference to "single" driver is in the use of one drive unit reproducing all or most of the ear-critical region, i.e. ~100 - ~10kHz (or 300-6kHz). The sound benefits greatly, as Ultrakaz notes above: you only have one source for the bulk of music's frequency content. And, therefore, you do not need a crossover in that area, AND the result is very versatile as, when you DO use a-over it can be behind the amp (line-level) - OR at frequencies where our ear is less sensitive to distortion effects (150Hz, etc).
On the down side, there are small peaks in the amplitude response as you go up in frequency (that can be addressed with appropriate filters, if need be), good wide-range drivers are expensive, accompanying super-tweets and woofs/ subwoofs MUST be commensurate (i.e. very good quality).
Good "single driver" designs are very high-end, both regarding reproduction & price.
Using ss is not a problem IMO -- I'm happy with it (I also use SET).
Cheers
On the down side, there are small peaks in the amplitude response as you go up in frequency (that can be addressed with appropriate filters, if need be), good wide-range drivers are expensive, accompanying super-tweets and woofs/ subwoofs MUST be commensurate (i.e. very good quality).
Good "single driver" designs are very high-end, both regarding reproduction & price.
Using ss is not a problem IMO -- I'm happy with it (I also use SET).
Cheers