Now that I have my speakers set to where I hear the stereo image, I was listening to Chuck Loeb’s “All there is” and engaged the SH. I was hearing a difference that sounded good, wider sound stage and instruments more separated. I have never had my speakers setup correctly until recently, so I have never heard SH function “correctly”. My speakers are not setup anywhere near the correct positions per the manual. But I am in the sweet spot when listening to music.