My N803s took a couple of months of regular playing to finally open up. The bass will go deeper with better definiton, the highs will be smoother and the soundstage depth will also increase. One way to speed up the process (and not disturb the housemates) is to put the speakers face to face, as close together without touching, and wire ONE speaker out of phase (red to black and vice versa on amp OR speaker side). If you let the radio play in mono you will barely hear any sound but the speakers will still be getting quite a workout.
