I see. I'm using Magaosi K5, partnered with iBasso DX120. I don't use any other gears, just those 2, almost for a year now and I use it everyday. So I can say that I somewhat memorized its sound signature. So when I switched to DTR1, I find it smoother sounding compared to dx120. It made the dx120 sound aggressive with more sparkle. Maybe I got used to the sound and my brain is still adjusting to the sound of DTR1? lol PS: will upgrade to S8f in the future, hoping to get some feedback from you since I know you own both the dtr and s8f.