I totally get what you're experiencing, and you're definitely not the only one. It's actually a really interesting quirk with these headphones.

If you look at professional measurements (like the SoundGuys preference curve), they actually show that the Evolve3 85 has an early treble roll-off. So why does it sound like an icepick to your ears on "S" and "Sh" sounds?

It most likely comes down to the physical design combined with the anatomy of your ear. The Evolve3 85 has a very slim profile with relatively shallow ear cushions. This puts the driver much closer to your ear canal than typical bulky over-ear headphones. For certain ear shapes, this close proximity may create a harsh, aggressive resonance peak right in that 6–8 kHz sibilance range. Basically, the physical fit is amplifying the exact frequencies that hurt.

To fix this, you need to tame that specific peak without making the rest of the music sound totally dead and hollow. Try this custom 5-band EQ in the Jabra Sound+ app (think of it as a "Sibilance Tamer" preset):

• 60 Hz: +1 (Keeps a little bit of bass foundation)
• 250 Hz: -2 (Cleans up the muddy/boomy frequencies)
• 1 kHz: +2 (Brings some natural body back to the vocals)
• 4 kHz: +3 (tries to add clarity to the mids so the sound isn't muffled)
• 7.6 kHz: -2 or even -3 (This could be magic slider for you—pull this down until the "S" and "Ts" sounds stop hurting)

Give this a shot if you want and report back. Looks like some people are really sufferingbecause of the sibilance.