 This of course requires that the two midwoofers are in exactly the same plane, and exactly the same distance from the tweeter - which is much easier to do physically.There is however a price to pay for this - although the MTM's on-axis response is near perfect, its radiation pattern or main lobe is much narrower than that of the MT or TM configuration's.As a result, the off-axis response (i.e., response at locations vertically away from exactly opposite the tweeter) is much weaker and there can be obvious and discernible change in tonality at the crossover as one's listening height relative to the tweeter changes, and the effect is perceived more as the listener moves closer to the loudspeaker.