Have you considered a used T+A DAC 200? It is a superb DAC and a very good headphone amp. I have one.
Combo DAC/AMP for Headphones
I currently have a HiFIman EF400 DAC/AMP for my HiFiman HE1000 headphones. I would like to consider a upgrade. What would be a step up under 1500. I'm open minded but kind of like R2R Dacs. or.......
Do I keep the EF400 as a DAC only and spend the money on a amp?
Thanks in Advance