I heard some more improvement in the sound signature of the AE-5, this time in the bass, I can't put my finger on it. But what I hear from the bass is better then it was before. Comes off as being more controlled and accurate, this is with both the mid and low bass. It just took an while before the bass settled in. One thing is the bass is a lot better then it originally sound out of the box. The highs at-least to my ears sound like that it gotten more smoothed. This was with the Direct Headphone setting with my ATH-AC400s and Direct stereo when I using the jotunheim and R70Xs.