Interesting question and responses. I think that equipment designers fall into at least two camps (I'm sure others can add more). There are those who strive to build equipment which accurately reproduces/decodes the signal being fed to it, so their response would be that they will leave it to the recording engineer and producer to get that live performance onto the recording, and they'll take it from there. However, there are also designers who appear to intentionally design their equipment to reproduce an emotional response from the listener, and perhaps part of this is an attempt to recapture the essence of a live performance that often seems to get lost in the recording process. I cite as evidence of the latter camp the large number of pieces of high end equipment which measure poorly but nonetheless have been critically acclaimed and have their ardent supporters. These designers might tell you, though, that their purpose is to bring out the best in the music being played through the system, not necessarily to reproduce the original performance. I guess my goal as the obsessive compulsive neurotic that I am is to assemble a system of components that gets me closer to the original performance if possible (I know that's never going to happen, particularly with full scale symphonic repertoire) but above all communicates the composer's/artist's message and the emotion of the performance and music being played.
