Sound
Resolution
Also called detail, detail retrieval, resolving power
Resolution is how much fine detail a product lets you hear: the breath before a note, the texture of a bow on a string, the room around a singer. High-resolution gear reveals small sounds without making them louder.
Detail is easy to fake with extra Treble, which is why a Bright product can seem more resolving at first. Real resolution shows up in the Mids and bass too, as texture rather than sparkle, and it holds up at low volume.
Low distortion, good driver control and a quiet Noise floor all contribute. Listeners disagree about how much of it comes from the source and amplifier once a certain standard is met.
Resolution, Separation and Layering overlap: resolution is about hearing the small things, separation about telling them apart, layering about placing them front to back.