Wayfire Edition : sound

Is there any way to improve the sound?

intel hd audio, from 3,5 jack - headphones

any settings to better sound for intel HDA ?
is there any kind of manul how to improve the sound?
maybe the equalizer needs to be changed, or something like that?

or, afret install, its < maximum > what is this equipment possible for?

Try to check in the Arch wiki.
Assuming that you have a standard config with pipewire: