single driver speakers


Someone please help me out here...

I am struggling to understand how a single driver system can sound anywhere near as good as a multiple-driver system with crossovers...

I understand that crossovers and multiple drivers can have issues with interference, phase, etc - but those drawbacks would seem to be vastly outweighed by the increased frequency response and clarity within a frequency spectrum that a multi-driver system produces.

I see these

https://www.audiogon.com/listings/lis8ij2i-voxativ-ampeggio-due-70-off-priced-to-move-full-range

and just can not wrap my mind around how they could sound better than a multi-driver system costing 1/10 as much. (no knock intended on the seller of these speakers, I was just browsing listings and saw them so it made me wonder)

Thanks!
babyseaotter99
Hello babyseaotter99,

i can speak a bit to this topic, with limitations, of course. I built a pair of single driver speakers to use with a tube amp kit (Bob Latino ST-120 kit, 70 wpc).  The drivers are Mark Audio Alpair 12p, cabinets are a slight variation of the Pencil design.  The rest of the chain is Rotel CD player with Arcam irDac, ProJect Carbon Debut w/Ortofon Blue cartridge, Schiit Mani phono pre, Schiit Saga preamp.  My experience has been this: single drivers are very nice for smaller scale music, but they fall short on bigger more complicate stuff, as to be expected.  These particular drivers have a very long break-in (Mark Audio suggests 300 hours, the first 100, I think at very low volume), I’ve had them over a year and it feels like they are still mellowing out.  Bass is very substantial for an 8” driver, and of nice quality too, considering the cabinet is vented (I’m learning that sealed cabinets are my thing!).  Midrange is very pleasingly detailed on good recordings, especially on those less complicated ones (think jazz trios, chamber quartets, etc.).  Where they fall very short is in treble quality, which can often sound etched and unnatural, sometimes even at low volumes.  The pros: you can build your own speakers for pretty cheap, $300 drivers, $80 MDF, $30 other parts, no crossover, so simple and straightforward.  The cons: they simply will not rock like a multi way, of course, so the program material they can handle is limited. Rickie Lee Jones and a piano will sound great, Metallica will not, especially as the volume goes up. For an investment of $400, you can have some fun and some speakers that can go head to head with ones I heard at Axpona this year that go for $4000. It’s much harder to get that kind of value in a multi way speaker.  
@seanheis1 Wow! Life must be tougher for audiophiles in America. So many choices and so much happening in the world of loudspeakers.

Along with Devore and Zu there seems to a trend towards minimalist drivers and crossovers - and high efficiency paper cones too.

This could well be another golden age of loudspeaker design. 
I have Loth-X Troubadours with 10 inch Stamm drivers in a folded horn construction. They are not made anymore. They are 104db so keep mobile phones away...they can be driven of a headphone amp! Using them with either 8 W pc 300b or 25 W pc 211 amps. Better than multiple drivers? Put it this way, I am also mastering and cutting records for a living, and I always bring the test pressings home to listen on the Loth-X set up. We have an awesome multi driver and 95db efficient setup using 211 tubes in the studio for mastering, which has superb resolution to 0.5 db, but it is the "nothing there" clarity of the Loth-X that is unbeatable. 
gotta have yourself a listen. I used to pick them apart, couple songs later, their magic simply takes over. a quality set amp and high efficiency speakers are very rewarding. I ditched the multi drivers (;
key is they need tubes. Solid state amps don't normally control their woofers properly and it can be a real mess.