I am kind of shocked or rather impresed what I can achieve with S12 with Final E tips Clear/red ones and with my cable which has benefits of better stage perception, staging and imaging got quite improved so it doesn't sound like it is your head, there is a good width and a good depth, wow, I am talking about stage perception and layering strictly. Try at least Final E tips, the newer ones and you will see that it has some benefts of better stage perception, they are more bright than standard ones so I am assuming that it is the reason why. I really can tell the difference, with original cable and stock tips it sounds flat and sort of nothing special, just an ordinary good IEM, but with additional improvements it sounds like something else.
Also I am prefering this sort of low end than that of my EJ07m, it is clean, fast, there is no that woofer effect which sometimes can distract your attention and sound unnatural, I guess I prefer more balanced signature or at least a cleaner one without exageration. But again, don't get me wrong EJ07m is great, I am only talking about my preferences, and I really enjoy my EJ07m as well.