Hey. First off: what the hell is Stereo X, and properly configured, would it improve "audio quality?". Obviously it can't, but you know what I mean. I sat with the damn thing for 2 hours, trying to improve the sound, and failed. I listen to metal, rock, alternative stuff - Mudvayne, Tool, Hurt, PoTF etc (some kind of reference). Phone: HTC One In-ear phones: Shure SE-535 I officially gave up on the thing, but I still use it. Always with a flat EQ (since all the other EQ's suck ass), SRS, the other stuff, bass and treble at about 50%. And then this: http://forum.xda-developers.com/showthread.php?p=50444665 - Project ERA v13 Thanks.