Hi Lak (and Ozzy),
D8's are now at about 150 hr. I haven't really had time to sit down and listen for long stretches but the reason I said "500 hours" to go is based on info from people on this post and my own experience with D5 SC's break in. D8's didn't blow D5's right out the gate but just more extension, details and lush. Bass is still come and go and top end also not as refined (sometimes sound a little worse than D5), but you could tell the potential once it fully breaks in. It may or may not meet my expectation but going from D5 to D8, I could feel a little easy that it will definitely be better.
D8's are now at about 150 hr. I haven't really had time to sit down and listen for long stretches but the reason I said "500 hours" to go is based on info from people on this post and my own experience with D5 SC's break in. D8's didn't blow D5's right out the gate but just more extension, details and lush. Bass is still come and go and top end also not as refined (sometimes sound a little worse than D5), but you could tell the potential once it fully breaks in. It may or may not meet my expectation but going from D5 to D8, I could feel a little easy that it will definitely be better.