Usually when reading about frequency ranges the "treble range" is 2.5k-5k and the "brilliance range" is everything above 5k. Does this possibly mean also the Sonos treble EQ boosts/cuts only 2.5k-5k? Or does it affect everything above 2.5k all the way to the 20s? Is lowering treble a linear equalization? (all affected frequencies cut/boosted the same).