Just got my HD6XX’s and they are excellent so far, almost... played them through my iPhone XS, IPad 4 and Marantz SR5014. I know a dedicated headphone amp will improve the sound but I don’t want to throw money away if I’d doesn’t accomplish what I want. Basically they sound amazing until there’s significant bass like an explosion, obviously open back headphones aren’t what a bass head has in mind but these just fall apart completely. Watched Greyhound on the iPad and played some Call of Duty modern warfare, everything is amazing until some demanding bass is thrown at the HD6XX’s. Question is, will a Schiit Heresy or JDS Atom solve this?