Dire Straits was very loud. It was a Rock Show. Or call it, it was "solid rock"
They sometimes had some issues (i remember a very weak gig in the olympic stadium munich, too less PA and bad acoustic) but on the other hand i will never forget Nimes 1992 in france, when all you have in your stomach was in movement, especially at the bass lines of "Private Investigations" - yes, it was a good time , ...
i was in Basel 1992 too, one of the best concerts ever (heavy great versions of The Bug, Sultans, Solid Rock and Telegraph Road)
in todays gigs of MK i often miss bit more bass and drumpower out of the PA - as i remember the Shangri La was mixed live by the same guy who tours with Eric Clapton, it was noticeable as the PA was more set on Rock ...
Best sound is very difficult to achieve in big venues, i was at U2 in Athen 2010 Olympic stadium, the first part was very bad, and the 2nd part was powerful and clear sound, sometimes a miracle what they are doing with the sound - and i will never forget the excellent sound of Pink Floyd...