Use a parallel high band to add intelligibility

Using a parallel high band yields more control, like adding a compressor or de-esser. This is useful for vocal “air.”¹ The Dolby A mod trick does something similar. Mike Senior also notches out problematic sibilant frequencies here. He will also add stereo enhancement by using either a short reverb or a Classic pitch-shift delay effect.¹

On a kick, use a high-pass around 3kHz, so only the attack comes through. This also works well for toms.²

See EQing multi-mic setups and parallel EQ.