Mics hand-held and performance recorded from 9th row center.
It was incredibly painful!
+T for the bulging bicep workout.
IMO, Like others have mentioned this is pointless for recoring anything that goes through a PA. Even when recording acoustic sources there is something to be said for a gradual
smooth roll of of the uber high freq. - even with higher sampling rates. I've heard string quartets and jazz drummer's cymbals with plenty of energy up there recorded with ribbon mics that blew me away with the
natural sound of the top octave, & ribbon mics are generally
way down by 16-18k. I've also been impressed with some very natural sounding Earthworks recordings that had killer airy transients and response far above what I can hear. but for my money, a smooth response is more important than ultimate extension.
Think of it as leaving a little frequency headroom if it makes you feel better about unused bandwidth up there.
Keep in mind that there are always trade off's. Capturing those dog eared frequencies requires mics with very small diaphrams that are generally noisier. Which, like everything else can be somewhat offset with $$$$. Just make sure the trade off's you make are for better sounding, more involving music and not just specs on paper.