Any way to eliminate sibilance?

[AvidSurvivalist]

On my Venue 8 3830 with Rocket Player and Skullcandy Ink'd earbuds. I completely cut the 4k, 8k, and 16k and it's still there. I know sibilance occurs at the 8 kHz range and I cut it on the 10 band equaliser in Rocket Player.