Thanks everyone for the comments and discussion! Some background: I have Feliks Elise mk2 (2018) with Psvane CV181-TII (same as Euforia stock tubes) at the moment. Of course I will buy other tubes for it step by step, but I can imagine HD800 high treble frequency response could match the amp...

Yeah, I know there is a BIG difference in frequency response between 5-8kHz compared to HD650, which lacks a bit too much of those frequencies IMO. That’s why I’m actually upgrading. Maybe it’s better to do a proper demo listening somewhere before buying, hopefully with (my own) tube amp.. Btw...

Hi, I’m a newcomer here. I’m also going to upgrade my HD650 to 800 or 800S. I have learned that many people prefer HD800 over HD800S if driving them on tube amp, and HD800S is more preferred for solid state owners. If I look frequency curves there are some slight differences between those two. I...