Trifield is great. With my original Magnepan MG-IIIa, Trifield was a definite plus, which enhanced imaging considerably. But the weak point was the center speaker (MGCC1) that did not have the same dispersion pattern as the mains, plus the fact that was not at the same listening height. Now with the MG-3.6/R, its imaging is much improved, so I don't get as much an improvement with Trifield. But I was able to use one of the MG-IIIa as a center channel, which moved realism to another level compared to using the small center channel. Now I don't have to compromise between making the center channel disappear vs maximum imaging.