Back in 1997 when Barry Norman reviewed 'The Lost World: Jurassic Park II' he complained that he couldn't hear a word of what anybody was saying onscreen, especially during the action sequences. He also complained that the volume was painfully loud.
A colleague of mine wrote to him and argued that it's not the fault of the movie sound engineer. The exhibitors are to blame.

The projection and sound systems are below par in many cinemas and are rarely set up correctly, and to add insult to injury they push the equipment well beyond its limitations.
Sub-Standard equipment & Poor calibration + Volume knob at 11 = Distortion and busted eardrums
Top equipment & professional calibration + Volume knob at 11 = Awesome cinema experience.
We tested two home theatre systems with a sound pressure meter to prove this point. Both were measured at exactly the same volume, yet the difference was astonishing. The first system really hurt I have to say, but the second was so clear and transparent that we were inclined to turn up the volume even more, which we did

... In fact, it wasn't until my colleague (who was sitting right next to me) shouted his approval at the top of his voice (without me hearing a word of it), we realised that we may have had it a tad high
It reminded me of the Empire Leicester Square ten years ago when it was THX certified....LOUD, LOUD, LOUD with room for more!
Saw Terminator 3 in the Odeon L.Square and I could hear the midrange drivers farting their arses off. The speaker was either not equal to the task or was asking too much of the amplifier... who knows.
Contrary to the thread title, I went to see Master & Commander earlier this year at the UCI in Sutton. It was in very quiet MONO!

I had a gripe at the lad in charge after the film ended and his reply was..."What's a subwoofer?"

I left...
Four months later I saw the DVD of the same film

WOW!