My wife and I have attended many concerts this summer - some in very good forums and others in poor venues.
Radio City NYC was the best indoor venue so far. The open outdoor forum at Bethel NY (Woodstock) was the best overall.
The stacks of flying JBLs inside this small hall in NYC (seating est. about 4K) was more than adequate to blow the roof off. This hall was specifically designed in the early 20th centery to provide excellent accustics.
Unfortunately, the engineers keep the sound pressure level very low - my estimate would be around 85db. They did not crank it once during the three hour show.
See the atttached photo of the flying JBL cabs.