Interesting quote from AEJim recently (a speaker manufacturer of note).
AEJim:Actually I've found that market demands, mainly directed by the press (and probably cable manufacturers too!) have been the main reason for making bi-wire the norm nowadays.
Personally I'd rather make single-wire speakers, every engineer I know would rather make single-wire speakers - when you go to the shops with a single-wire speaker they often use it as a reason not to like a speaker - "ooh, single-wire mate, all the competition use bi-wire, our customers won't like it...". In reality unless you are using some awful components you can always make a single-wire speaker work better than bi-wire purely due to the fact you can make the crossover simpler and with fewer components.
There is always an argument for bi-amping, but then this can be done left/right for single-wire speaker designs rather than top/bottom so you still get the power and low crosstalk benefits.
Needless to say when we made our latest range our UK Sales Manager at the time insisted that at the price-point they HAVE to be bi-wire so they are... I don't think any new future models while I am here will be 😉
Oddly it doesn't seem to affect the high-end products so much, people I guess presume that the crossovers are higher grade or something, on the same note the manufacturers who've never offered it don't seem to be affected either (Dynaudio spring to mind).
I'm not saying bi-wire can never offer benefits, just that if the crossover is designed well you certainly shouldn't need to do it, and if you didn't have to offer it as a manufacturer you'd probably be able to design the crossover better in the first place!
Interesting quote from me:
JohnDuncan:Neutron Vs with single-wire QED Revelation are great.
Listen. Buy the ones that sound best.