I find it hard to pinpoint. 14kHz is pretty clear, 15kHz very faint and 16kHz gets uncomfortable when I turn the volume up but otherwise not really audible. Any

I find it hard to pinpoint. 14kHz is pretty clear, 15kHz very faint and 16kHz gets uncomfortable when I turn the volume up but otherwise not really audible. Anything beyond that I only hear the clipping at the start and end with nothing in between.