In the field of electronics and sound production, HiFi has a requirement to produce and electronics that is purifying the sound being produced.
All other electronics produced for sound production are usually designed to distort sound in some shape or form, or control sound that is to be recorded.
In the world of listening to music where electronics are involved, it is nearly all listening to the Gear and the Sound that is a result of the Gear.
Meet an Acoustic Guitarist Performing in an Open Place with only the guitar, is as natural a sound as one can hope for, meet the same Acoustic Guitar and a Microphone and Amp is involved, not so Natural a Sound, meet the same Acoustic Guitar Plugged into an Amp and sound produced via a speaker, not natural.
Meet an Electric Guitar plugged into a selection of foot peddle sound control boxes and Amp, listened to through Speakers, definitely listening to the Sound produced by the Gear, as a result of the Guitarists capabilities.
Put any of the above into a recording studio, and through a mixing consul.
Well the gist is outlined.