Bernard, the main point is that the auto-equalization is attempting to analyse and correct for the effect that the room acoustics have on each speaker's output, not the speaker itself. So the correction for the same model speaker can vary along with its location in the room. Equalization is a developing technology and results have varied, with some users being pleased with an improvement(e.g. a colleague I assisted setting up a Yamaha 2400)while others have reported that the sound was worse. As always, experiment.
