With the caveat that I still haven't solved the noise (or whatever else it is) issue I'm having with the HM1 driving the Immanis, I spent some time playing with the soundstage knob today. The effect I perceive from the soundstage knob (not just with the Immanis, but all headphones) may be a little different than how others hear it. At the extreme left setting, the center of the image sounds close and distinct, but everything outside the center sounds pushed back, as though the musicians are arranged in a tight V-shape with the point facing me. Turning the knob to the right, the center stays fixed, but everything lateral of that moves toward me. At the far right setting, the musicians are arranged in a gentle concave arc in which the musicians on the sides have wrapped around to my left and right. With headphones other than the Immanis, the musician at the far left and right sound to me like they remain the same distance apart, but the knob moves them forward or back such that their relative angle to me narrows or widens. With the Immanis, that is mostly still true, but I am hearing a bit of lateral separation now--the farther right on the knob, the closer the musicians positioned at the sides move to me, but they also seem to spread farther away from one another (but only a little bit). Even with this Immanis-unique characteristic, the overall effect to my ears is to make the soundstage more intimate (with respect to depth, but perhaps not laterally) the farther to the right on the knob I go (I may be alone in perceiving it this way). The effect of this, with respect to solidity and focus, is that with the knob to the left, the center image is completely solid and in focus but everything else is not--almost like the other musicians are standing behind the center musician. Swing the knob to the right, and the other musicians step out from the center and move toward me, which brings them more into focus and adds a lot of lateral solidity. I love that effect, even if it's unnatural, and often crank that knob all the way to the right. YMMV, of course. Hope it helps!