What is your final amp? Crack or Novo better? The problem with Crack is I don't have the skill to DiY and no one can help me neither. Budget only $200. and $250 is my maximum. Hopefully able to get some amp that doesn't cost a bomb for shipping to my country. Or Crack is definitely the best?
My hunch say that Crack would be a better choice. Its tube rolling capability. Plus it doesn't require match paired tube.
It is like having different amps when you change tubes. Mullard & Sieman --they are different.
Mullard is more romantic but Siemans is more on hifi sound
Plus you can add the speedball upgrade
From my understanding, it can even use 6922 tubes but the socket needs to be change.
So you indirectly have many tweaking mechanism here
If i am not mistaken , from Tyle from inner fidelity find it the sound coming from Crack ( without speedball) is pretty hard to distinguish the quality
when compared to WooAudio 3.
Many good reviews saying crack is compatible with Hd600 & HD650 & HD800 . It can even drives other headphones as well
To be able to make HD800 sings, well that is something, really something for that price range.
HD800 is well known for its finicky attitude.