I heard the new IRSs when they were formally introduced. It was the first truly mind-boggling experience I had as a young audio enthusiast (a developing "audiophile"). They single-handedly catapulted me into the arena of realizing concert-hall realism (quality AND quantity) IS possible at home. A 40+-year career followed, and continues today.
We provide performance mods for audio equipment and recently reworked a pair of modest Infinitys. There is a replacement EMIT diagram that at least as good as the original.
I can't image these being anything less that spectacular with the right equipment pairing in a large room.