4kHz is a long way from treble still. You gotta get closer to 6~7kHz to border treble.
2kHz emphasis = stuffiness / veil; 2kHz recession = hollowness, lacking in midrange substance
4kHz emphasis = midrange edginess / aggression; 4kHz recession = mellowness and dulling of midrange transient attacks.
It's a fine line to balance, to my ears HE560s with the older hybrid pads does it well.
Edited by jerg - 7/6/14 at 2:45pm