I estimate the sound pressure level exceeded human's threshold, which is around 120dB SPL. The concert was playing well over 130dB SPL. And bass (low frequency) could have reached 140dB SPL. Judging from the vibration at my pants near my leg near & shoe.

This was extremely disappointing, as most audience cannot enjoy once the ear reached threshold, where it starts to saturate by holding the three (3) bones behind the ear drum incapable of movement. So to protect itself mechanically and internal organs.

I had to shut my ears every 10 minutes or so in order to release them from threshold. I cannot imagine for those people who are sitting much forward. I was sitting at the last row, 1/2 off center. I hope this message reached the engineers and that they would exercise this intelligent both for enjoyment as well as protection.

They were allot of young children...... their ears are damaged a little from this concert. That's for sure. Once a tiny part of the ear is damaged, it will not heel. It is considered dead and no operation will be able to revive it.

I also could not hear stereo performance. I only heard stereo drum pass from left to right once through out the entire concert. Perhaps for VIP audience sitting in the front center, they could discern a little better. However judging from the overload sound pressure level. I suspect they actually could not hear anything properly.

See the picture above. The left and right slightly bending column simply does not work for stereo in such a large space.

Their biggest mistake was too loud, where the left sound could never ever be strong enough to penetrate into the opposite (right) sound field.

If only the sound system engineers exercise from retreat / common sense, and played them moderate at around 90dB at the last row, the probability to hear stereo would have been a good 70% chance.

Balance between power and enjoyment is a deep understanding.