If you go to festivals (especially ones with multiple stages) you notice how the sound moves around in waves and washes. Atmospheric conditions, wind and so on push it this way and that. Same reason an aeroplane can be in the same place overhead on two different days, one day it's loud, the next you can hardly hear it. We live 'pretty close' to where the speakers were positioned. Last year (on the Monday) it was fairly loud sitting in the back garden; this year we hardly heard a thing. So it may be that those that were dismayed with it being 'louder' this year just got unlucky with where the sound went. From a (purely selfish) punter perspective, we were really impressed with the sound inside the event on Saturday. Loud enough to enjoy properly, but still able to talk the the person you were standing next to without having to shout. Ideal really. You can do your best with speaker placement but there's no magic wand to stop volume and frequency - especially bass frequencies - other than to reduce them. Unfortunately this sort of music requires enough volume to be enjoyable. When it's not loud enough, it's a disappointment, enough to spoil the experience. For some people (and I think we're only talking about a minority) this sort of music will ALWAYS be too loud. They'd only really be happy if you turned it, well, off.