glossary
A low shelf changes the weight of everything below its corner frequency.
A low-shelf EQ boosts or cuts frequencies below a selected corner frequency. It is wider than a bell move and changes the foundation of the sound.
Engineers use low shelves to add weight, reduce rumble, control mud, or make a source sit better against the kick and bass.
Boosting low end often increases peak level and limiter workload more than expected because bass carries a lot of energy.
Cutting too much can make a mix translate thinly on smaller speakers.
Use low-shelf moves while checking the mix bus, not only the soloed track. Level-match and compare against a reference with similar low-end intent.
Meter Core helps reveal when a low-end boost is improving weight and when it is mostly consuming headroom.