Well im here again with a new doubt:
tomorrow im upgrading my HD 598 to a HD 700 from Sennheiser and i need a new amp (budget amp)
this is my current RIG:
Custom pc > Schiit Modi > Schiit Magni > HD598
Theres no definition to cheap. To me, a cheap headphone would be the HD650 or HE-400, I doubt you think that too. Just get a Schiit Magni/Modi or JDSLabs O2/ODAC.