It doesnt matter what they record for - the aim of a "high fidelity" system is to play back whatever they did in high fidelity. If they mixed it for a cheap walkman then that is their "problem" or perhaps I shuld say "intent". I know full well that this occurs. However if the recording engineer cant get it on the recording and has to rely on the playback kit to put it back then he doesnt know how to do his job. However you shouldnt build a system with colourations to counteract certain recording engineers inclinations atthe expense of all the others - unless you listen to a very narrow range of music and recording styles. I dont so adding a colouration this way is unacceptable as it will ruin those recordings which are aimed at high fidelity systems. I think you have taken on the valve ideology far too readily.

The recording should accurately render what the artist and engineer intended. The hifi system should accurately render the recording. To suggest anything else is folly. (no offence obviously).

I can define accurate mathematically if required