im thinking its the Focals ..
From Chart 3 - Total Harmonic Distortion + Noise for Mini Utopia - the metal tweeter may be misbehaving at 9 Khz (looks like it resonates at 18 Khz). Since this is probably not musically related it may add an audible brilliance or sheen or air to some sounds (only 20 db down from main signal or about 10% distortion). This distortion is probably in the frequency range for cymbals or higher (what you hear after the cymbal is struck)...it may also be inaudible to you (most adults cannot hear much if anything above 16 Khz anyway)
If this is what you are hearing as "glare" then it probably is the speakers. Otherwise it is unlikely to be the speakers but could be the recording or type of music you like.

