You may also be having power quality issues. After midnight there are very few people dirtying up your power. Have you tried a power conditioner? It will do absolutely nothing for you if you already have clean power, but if the power in your area is poor then it can make a dramatic difference.
I think I will need to change up power cords or use a distributer in the future so a power conditioner might work very well. Same album now sounds ordinary, blurry and grainy. I might also try a few more shunt filters around the place to see if I can avoid in-series power filtering. I had a suspicion it might be power, so I think it's worth looking into (I can make shunt filters from $15 worth of components so not much risk there).
EDIT: I thnk i figured it out - the sunf filter I was using on the hifi circuit seems to have been doing more harm that good. No idea why.
Edited by drez - 10/13/13 at 2:13am