I just received my HD650 and they're still burning-in but they sound lovely with the little V1 and the Schiit Modi.
I know these cans deserve better gear and currently I'm saving for a new amp (Little Dot MK III? not 100% sure).
Meanwhile I'd like to upgrade the EH6922 tube to improve the sound of the Bravo. It's 18 months old so I thought it may not be performing at its best, but I don't know much about tubes so this might be totally wrong. I'm looking for a tube that will give me a bigger soundstage and better detail while still being all smooth and tubey and warm.
Is there any option?