If you want the magic of holographic soundstages of a realistic size then the ideal speaker is a single driver dipolar line source. No crossover, unified dispersion, magic. Doesn't exist.Yes it does. Check out the drivers from Lil Audio that are used in their Crystal 10 speaker. Single coaxial driver, no crossover, very high sensitivity, unique cabinetry to control back wave without stuffing, and decent low end extension. Decware sells them and they match well with their 2 watt SET amps.
J.Chip