Why would speakers be any different than earphones? Botu are subjective ; I personally hate flat eq. I've listened to numerous products, some worth thousands of dollars, and I'll always take some sort of slight bass and treble boost over flat eq. I'll even take a big bass boost over no bass boost at all.
Earphones are forgoing the outer parts of your ears and skull.
Speakers don't; a "good" speaker setup with eyes closed and no wind/perceptible airflow and no smell and truthful thermal radiation surroundings is effectively indistinguishable from the real place.
Like, literally.
It's not _possible_ with earphones because you can't not feel their presence without being numb on a good bit of your head.
> Why would speakers be any different than earphones
There are various "ideal" EQ targets for earphones depending on what your model of an ideal audio source is. They all start with a flat response speaker, from then you can model:
- Two speakers right next to the listener's ears. (flat)
- A single speaker 1 metre away in the x axis, in an infinitely-sized anechoic room. (free field)
- Two speakers 30 cm away pointing to a plastic torso at a 90° angle, in a room with reverberations. (B&K/Harman)
- A spherical room lined with speakers, point listener in the centre with no reverberation. (diffuse field)
- An infinite wall of speakers 1 metre away in the x axis. (another method for free field)
- etc