i believe they might be a software for that, i hope i found one soon,
i dont think i would buy the hardware equaliser, for that money i probably going to change my portable amp to tube amp,
to be honest my personal eq are rather low profile, almost like powerful equalizer but with even way flatter line
but enuf to cut off sibilance and make the sound more forward to counter my a little laid back amp
after using a dac(from onboard) i just dont really like how analytical my headphone now(dt 880-i know that wat it supposed to sound)
than it used to sound a little more musical
but going to back onboard i will lose another tons how good my dac sound..