As others have said, there's more to the sound of headphones than just EQ.
As a small example, listening to digital music, I prefer headphones with better imaging and wide soundstage, whereas when I listen to vinyl, I prefer a warmer sound with a more intimate soundstage. These kind of properties are more inherent to the headphones themselves and can't be controlled in EQ.
There's also no one size fits all solution for a headphone that responds well to eq. On something like a dt770, you can crank up the bass and rattle your skull, but with something like an hd600, cranking up the bass like that just makes the music sound muddy and imprecise.
Fit is also a big one. On a hot summer day, I'd prefer to use something with a loose fit and more breathable pads, but some days, I'd rather have something with a tighter fit and velour pads.
As others have said, there's more to the sound of headphones than just EQ.
As a small example, listening to digital music, I prefer headphones with better imaging and wide soundstage, whereas when I listen to vinyl, I prefer a warmer sound with a more intimate soundstage. These kind of properties are more inherent to the headphones themselves and can't be controlled in EQ.
There's also no one size fits all solution for a headphone that responds well to eq. On something like a dt770, you can crank up the bass and rattle your skull, but with something like an hd600, cranking up the bass like that just makes the music sound muddy and imprecise.
Fit is also a big one. On a hot summer day, I'd prefer to use something with a loose fit and more breathable pads, but some days, I'd rather have something with a tighter fit and velour pads.