Hi Bacardi, funny how you mentioned that. D8s are now at about 270 hr and I was just wondering earlier, before I read your post, where all this volume increase and bass extension coming from. lol It is much louder now for the same volume setting I have been listening for the past year. But at the same time, it is still quite noticeable that these D8s aren't fully broken in (mostly based on my experience with D5s). Can't wait to hit that 500 mark.