OK I have listened to about 10 albums now with the SEG50 chip...
Around 10 years ago I had a Little Dot III valve headphone amp. This was nice and had a nice liquid sound and superb sound-stage with my HD650s...
...but there were strange buzzes which spoiled the experience.
I ditched the Little Dot and started using Stan DACs...
...various upgrades, Anker battery upgrades were applied to the Bushmaster etc. This sounded a lot cleaner than the Little Dot but lacked the magic.
The modified Caiman SEG with SEG30 and Dorado with Chinese 16v linear PSU delivered big time - this had the liquid sound and sound-stage and was clean also. I was really enjoying my HD650s again (for the first time really since the Little Dot Valve days).
SEG50 seems to make everything a tad tighter - I am really enjoying this so far (and for just £9.99!)