16.7kHz is as far as I get. But now my ears seem to be popping

I bet ya Mam told you it'd make you deaf Mine did!

I've just done it again with a decent pair of speakers & I just make it to 12kHz. That'll be to much loud music, model & full size race engines without ear hole protection then.
Sitting at the end of RAE Farnborough runway for the airshow practise one year a pair of BAC Lightnings took off near vertical on full reheat. The 4 of us were sat less than a 100yds from the end of the runway & we had ringing ears for a few hours afterwards. Is it any wonder I'm a bit mutt

I bet ya Mam told you it'd make you deaf Mine did!

I've just done it again with a decent pair of speakers & I just make it to 12kHz. That'll be to much loud music, model & full size race engines without ear hole protection then.
Sitting at the end of RAE Farnborough runway for the airshow practise one year a pair of BAC Lightnings took off near vertical on full reheat. The 4 of us were sat less than a 100yds from the end of the runway & we had ringing ears for a few hours afterwards. Is it any wonder I'm a bit mutt

Lightning is sooo last century I had a very similar experience at Farnborough one year with the Eurofighter (on the company naturally ). Trade days are best as you can actually get nearer the runway. My god that thing is ear-splittingly loud!

The original Lightning was indeed a tremendous bit of kit for its day, but remember that it does have twice the number of engines..

Incidentally our friends across the pond cunningly ignored our lightning when naming the F-35 the Lightning-II (the first lightning being also of american origin)

I just happen to know a bit about the F-35 controls too