no false large soundstage created by early reflections, etc.A rightfully use of the timing of reflections can produce an unusual soundstage but it is related to the way the recording or mixing was made...Active controls is based on the use of the reverberation time and the timing between early and late and even back and front reflections and their ratio and the 2 main frontwaves for each ears...
Then it is not a "gimick" nor a "trickery" and it is easy to verify that your room is correctly modified with some other recordings which will not present this unusual soundstage...
No classical recording is always the same and always orthodox...There is some exceptions...
i am OK and in accord with your 2 posts.... I just wanted to give my take and experience with my own room sometimes unusual soundstage recording dependent...
I enjoy sometimes with some recording the impression to live among musicians on the scene, which event never happen in a concert where you were seated in front of the musicians... If the room is not under control this surround and enveloping experience with a stereo system is impossible even with a recording album which had this possibility in it because of the particular way it was recorded...