I dunno, but I don't think so.  I'm a bit of ignoramus when it comes to these things and can see what I'm imagining in my head but find it dificult to put into words. 

Maybe if I used a light analogy.  If I were to think of a normal set of reasonably wide dispersion speakers as like a set of headlights with quite a wide conical beam - shining into a garage with white walls - would that be a fair analogy?  Light going out to the side of the headlights would reflect back in off the walls, but if you put some black light absorbent blinkers on the outside edges of the lights to catch the half of the beams going out, you wouldn't get the side reflections - between the blinkers it'd be the same just without the wall reflections ... unlike narrow beam spotlights which would I guess be more akin to the directional speakers described by Tenson.  Wouldn't speakers blinkered in this way work without producing a specific hotspot so long as you sat within the space between the blinkers and without reflections off the walls?