Each model is different, but the cabinet for the bass bins in the Stage and Professional Series are the same. The Theater Series is different. I've sent plans for the Professional Series seven π cornerhorn, the highest quality model.Imaging is such a subjective term. It is also affected by music source as much or more than any other thing. But one thing can be said for sure of constant directivity speakers, the imaging is more uniform across the listening field. You don't have to be exactly in one spot for things to "click in" like speakers with non-uniform directivity. Imaging is great over a larger listening area.