Lloydc, you are right. It's 0:45AM and everything's place. Even listening to Spotify free via a bluetooth connection seems to work okay. I also suffer the paranoia about disturbing others, but now that I think of it, maybe the paranoia of being all alone with music blasting at night would be even worse, I could end up looking over my shoulder. Late night listening has also teached me that you can get a lot out of low volumes with a good system. Regarding filters and such I've just realized something, this also happens to me when I play guitar! My acoustic sometimes sounds awful, and sometimes it's wonderful and sings with a light touch. No power outlets or cables involved there, so I vote for the mood, sinus, stress, manic-depressive ears theory.