My experience with single-driver speakers has led me to the opinion that they can be very close to electrostats for speed, transparency, and imaging. The point-source nature of these single drivers, is about the best for imaging, and the very light cones, with strong magnetic motors, like my Lowthers, can approximate the speed, and miniscule low level detail reproduction. The box is actually the thing that you hear, that makes you realize it is in a box, because the resonances add colorations to the otherwise "stat-like" sound. If the box is very good, this is minimized, but still there. I can't drive electrostats, so I think single-drivers are the next best thing.
Box speakers that sound like Electrostats?
Has anyone found a monitor or full range speaker that compares to an electrostat?