If there is anything obvious about obvious truths, it is their truth. Nothing else about them need be, and often nothing else is. Moreover, some obvious truths are obvious only in retrospect. Obvious truths – truisms – can be revealing, insightful and even important. Take what is certainly one of audio's most obvious truisms: an audio system is, after all, a system! Patently obvious? Yes. Uninteresting or unimportant? Hardly!