I am looking for a headphone amplifier to use instead of my TEAC UD-H01 DAC's built in one. I feel like the DAC's degrading the sound on my Beyerdynamic COPs since it is fixed gain and these really need a lower gain setting. But I also have a DT 990 600 Ohm so I need a high gain setting as well. I don't really want to break the bank with this. I was looking at the Asgard 2 but it seems expensive and has humming issues. Their customer support is also annoying.
No wall wart (uses standard power cable instead)
Want (can compromise):
Power switch on front (not back)
1/4 inch input (don't want to have to adapt)
This is primarily going to be for the COPs through the RCA out of my DAC. But I would also expect it to work with my DT 990s. I'd really appreciate any ideas or suggestions.