Hifiman HE6SE V2 frequency response measurement Blue: Default pads smoothest Purple: Dekoni Fenestrated Sheepskinraised 1khz more treble above 4khz, especially above 10khz more linear than stock pads between 1-8khz by raising the whole region too sparkly sometimes Brown: Dekoni Elite Velour most linear overall but also highest peak at 4-5khz