First pair I had, which had a slightly different serial number to the 2nd and 3rd replacements (i assume it was slightly older, but was still gibson) actually sounds the best by far and is more comfortable too which is weird. They all had glued on pads. I didn't even bother listening to the 2nd pair because the metal band issue was so bad. The third was cosmetically sound (apart from the glued pads), but the sound stage was so small like directly in my ear, I though it might just require burn it so I used it solo for a week and they sounded pretty decent, as soon as I put my initial pair back on though just for comparison the difference was so obvious, the SQ seemed to have somehow deteriorated from my initial A/B. The soundstage on the 1st pair was far wider, the highs weren't so sharp and the bass was actually there (the bass surprised me the most). The annoying thing is that if I didn't have the 1st pair to compare with I would have thought that the bad pair were good.