Audio noob here. Just picked up HD6xxx's and THX AAA 789 and the pair sounds fantastic but unless I max the gain knob they just simply don't get loud enough. I have a Sennheiser GSX 1000 gaming dac that I can output via 3.5 jack to rca or Scarlett 2i2 interface via balanced 1/4 to xlr to the 789 but don't have balanced cables for my HD6xxx.
Debating on spending $70 on periapt cables for balanced output or $110 on a FiiO K3 amp to add to the equation but I don't know if it would diminish the quality running to the K3 to my 789 then to my headphones. Leaning towards the K3 though because I also have Audio-Technica ATH-AD700x's that I really like to use for some metal cause the drums sound so sick so I would benefit from the slight bass boost with the K3 as well. Thoughts? Would it be stupid to run from K3 to 789? Or is the balanced cable for the better headphones the better option? Appreciate it!!