Infoseeker
Headphoneus Supremus
Excess treble could come from anywhere in your system, or just your own ears. Have you tried other amps, cables or sources first?
I did indeed get an amp to compensate. Both my Bryston BHA-1 and my FluxLab Volot solid state amps don't have excess treble.
My real problem is the headphones. Planar headphones got less dynamics and need the A22 energy over r2r stuff to make them sound fun......Too bad so many planars have excess post-10khz frequencies.
The combo is still great with my dynamics stuff cause they don't extend that far into the treble (nor in excess)
Current generation planar headphones just suck.
Of course none of this is a problem using the dac with my speaker setup.