Well, I didn't bring a sound meter with me, but even at 40 feet I'd easily estimate the peaks at mid-90s. Easily. The trumpets were quite loud even at that distance. You *felt* them.
The reason music has to be relative loud to sound "live" is described by the Fletcher-Munson curves. Turn down the sound and you change the perceived frequency balance. I never said one has to listen at 110db, but if you don't let a drum kit generate near 100db peak when played with passion it isn't going to sound live. It's the same thing even with a solo violin. Some professional violinists, for example, get some hearing loss in the ear on the side that they hold the violin.
I don't mean to be as silly as this sounds, but it is an inconvenient truth that if you want reproduced music to sound live it needs to have loudness and scale similar to the original performance. With a violin, a piano, a cello, a guitar, a human voice, and I think even a drum kit, this is practical, but for orchestras, big bands, rock groups, and anything "big" we can make reproduction "impressive", but "live" takes loudness and scale. I'm not saying it's always advisable to even try to achieve live levels, but peaks limited to 92db mean there's only a very limited domain for live sound. Like I said, an inconvenient truth.