I played a 50" Paiste gong at the London Drum Show and it was like a religious experience.
This one is way different.
Insane! It really is something.I heard one of these in the early 80’s, it was touring around Australia. A performer played a crescendo on it just before the interval at a percussion ensemble concert. Got almost to jet engine levels. We were able to walk up during the interval and hear it up close as it decayed. It took 15 minutes to die down, and was still rumbling a bit at the end of the concert an hour later.