Other observations:
The Treo central image (vocal) was very natural, a bit laid back behind the speakers, smaller than life size. The perspective was as if from a box seat above the stage, maybe five feet above the vocalist. Even though the actual image appeared only a couple of feet behind the speakers, the smaller size gave an impression of a greater distance and larger soundstage - Fleetwood Mac Rumours, "Oh, Daddy" track. I liked it. Diana Krall at the piano had a similar presentation. The 3A Sigs are more life size on the Fleetwood Mac. Laid back, smaller stage but more "face to face".