For the past year or so, I've been listening to my empeg and noticed a slight distortion-like sound on certain songs. This usually seemed to occur on mid-range frequencies, but it happened sporadically - with different songs. I thought it strange, since I never had this problem when I played a CD of the same music on my head unit (uses the same amplifier, empeg is plugged into it, etc). Also, my MP3's are encoded at 256 SBR so I wouldn't expect it to be a bad encoding problem. Also, the max volume on the empeg is locked to a max of 0db.

Finally, today on the way to work (at a light) I went into the Hijack controls and noticed that the Automatic Volume Control was on Medium. Not really sure if this was the cause I shut it off. After that, everything sounded better and the odd distortion-like sound went away.

Has anyone ran into this before? I searched the faq and the forum to no avail. I'm curious about this.