Ouch with the "maybe my hearing isnt good enough ").
Hi Dave,
I didn't want to tell things wrong,sometimes there's still the language barriere and it's a bit hard to find the right words,hahaha........
15kHz is quite high and can be pretty close to what people are able to hear,I'm not refering to the normal loss while getting older but especially the young people nowadays.
A lot of my students certainly do have problems in that frequency range!They are aged around 20 to 24 years,and the older guys here will know why this happens....and it is irreversible!
I'm 50+ but do hear them btw.
So always take care,our ears are the most valuable instruments we audiofreaks have!
But this is completely off-topic now,me culpa

Have fun with these great equalizers (I do),
cheers,
Udo.