Okay, the short version: on a board in a galaxy far away (called the Blue Note bulletin board in the galaxy of We Can't Get No Respect) it was revealed by a poster who has a decided audophile bent (and a pugnacious nature) that by reversing the polarity of the playback of most JRVGs (that is changing the + and - leads at just one end of the speaker cables, either the amp or speaker but not both) yields a more natural sound.
I have been doing this for years now when playing back most every JRVG and in fact some of the early domestic RVG cds, and I agree with this. Others have expressed scorn, ambivalence, and other emotional responses.