I have a couple of questions about the loudspeaker configuration video (part 4). I don't know if this is the best place for my questions, but as they relate to one of the videos here, I'll start here and move if I need to.
1). In Part 4 "Loudspeaker configuration," a series of adjustments are made to the amplitude difference and time difference in a few brief spoken passages including descriptions of where one should hear the "phantom image." On my system the time differences appeared as described, but the amplitude differences did not. The sounds that were supposed to be 10 degrees, 20 degrees, and 30 degrees from center were more like 7, 16, and 25 (with the 30 degree image coming from the inside edge of each speaker--about 6-7 inches from the tweeter axis). This was true on both the left and right side. The centers of my speakers are 100 inches apart (254 cm) and 104 inches from my ears (264 cm), so not a perfect equilateral triangle, but reasonably close. They are large, 3-way towers, toed in but not firing directly at the listening position. Is it immediately obvious to anyone here why this might be occurring? Sidewall reflections?
2). At 9:25 in the same video, Dr. Martin demonstrates what can happen when the amplitude and time differences are opposite. In his demonstration he explains that one should either hear the phantom image from the right speaker or with some frequency bands appearing in each speaker. What does it mean that the phantom image appeared entirely in the left speaker in my system? I am concerned about some deficiency in my equipment or setup, but I have no idea where to start.
Thanks!