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Take note that if for example the venue fills up using the night you may have to adjust your equipment levels, ignorant actually absorb some of the frequencies inside room; this is the reason you often think you're being drowned out together with crowd when everything sounded perfect on rehearsal. Take , or minimum someone with an excellent ear to stand at different points area and the fridge. You may find you're clearly audible by the bar, but on lack of of the room you're a little