We saw S&B a couple of years ago at Bromyard, we were sat in the Gimps and dogs row about 3/4 of the way back. My wife doesn't walk too great due to RA and mant joint replacements but at least she walks. Anyhow some friend were about 1/4 of the way from the stage and HATED the stomp box, whereas we thought it was fine. The sound guy is even further away than we were (it was Bromyard's usual guy although I forget his name). Bass response dies off pretty quickly and he is a sound guy who has been doing this for many years with the usual drop off in sensitivity which they all have but don't admit to.
If you think live sound is easy, try it yourself sometime and then you will be entitled to complain (that's if you can do it any better.
I know I can't, JohnB.