All-analogue Air with relay-controlled circuitry is the engineer’s secret weapon. It captures transients on drums, makes vocals shine, and ensures a precise, clear recording. When Air is engaged the Clarett+ OctoPre switches impedance to 2.2kΩ and adds two cumulative high shelves, totalling a 4dB boost in the high frequencies, which recreates the sound of the classic Focusrite ISA 110.