I always even them out. bugs the shit out of me not to. might not be re-creating the sound where I was, but so be it, I can't listen to a show that's uneven by several db's. doesn't happen often, but for example happened a coupla weeks ago at blues traveler. we were more or less dfc, right in front of the soundboard, yet it seemed to me that the bass side was much louder. I evened them out quick and left 'em that way. I checked periodically to see if the sound guy evened things out, but nope.