the phrase "laid back" contains two words, namely "laid" and "back". i believe the context for "laid" is position of the sound, i.e., where is it coming from ?
the word, "back", would indicate a rear of the stage presentation. thus laid back would mean tat the sound of instruments appears to be projected from the back of a hall, studio, or other venue.
now, consider a recording. where is the microphone placed in the recording venue in relationship to the performing musicians ? each recording offers a different presentation with respect to placing the musicians at some position in the room.
if a stereo system always gives the impression that the music is coming from the back of a recording venue, is this not coloration and wouldn't such a stereo system be considered laid back. if so, laid back is not a coloration. if instead, laid back is not a coloration, does this mean laid back means lack of coloration or neutrality ?
one can't have it both ways. and yes, laid back creates a tonal balance in which, instruments placed in the foreground seem to attenuate treble frequency to a greater extent than bass frequencies. after all, treble frequencies have a shorter wave length.
i hope i don't sound like a lawyer.
i agree with you, ralph, that one should strive to create components which are faithful to the timbre, harmonics and dynamics of instruments. however, the best efforts of designers do not produce perfection. a well trained listener will discern a consistent sonic characteristic, i.e., coloration when listening to most stereo systems.
thus, it seems reasonable to accept that all components are colored (imperfect) and strive to minimize imperfection.
ralph, how do you minimize coloration in your designs ?