Hi. So what exactly happens during night hours and why the sound is so much better ? Either it comes from the better power supply during the night and much less electric noise or is this simply much more quiteter ? That made me think that something is so substantially elusive in Hi Fi and that is what makes the owner unhappy about their systems. It is the specific mid range - treble ambient elevation that can be at most only in quiet heard. I think this is the reason for any good system. If these ambience specifications were more emphasised in all loudspeakers , most would be satisfied with their sound. I noticed this with almost any passive speaker I had - that sounded extremely good during the night and simply average like during the day. Is this because of the less power pollution or simply night ambience ?