Hi nowave and JohnK,
A general comment regarding placement. Any "bookshelf" speaker will always sound more neutral and at its best on a stand. Floor placement even with the speaker tilted back introduces a major boundary influence. Depending on the room, that might be beneficial in terms of reinforcing the bass but it will inevitably introduce some coloration which may or may not be offensive.
You can always do an experiment and compare the sound of, say, an M22ti on the floor with the other one temporarily supported on a stand or a stool. Do the test in mono and switch back and forth using vocals and wide-range music to check changes in tonal character between the speakers.
Regards,
