u/Desperate-Analyst126

Pultec EQP-1A trick: boost + cut at the same low frequency. The bell curves have different Q widths so they do not fully cancel. You get a narrow dip riding on a wider lift. Adds weight to bass and kick without the mud. Why the hardware still moves.

The Pultec EQP-1A boost and cut bell curves use different Q widths. Set them to the same low frequency and they do not fully cancel: you get a narrow dip riding on a wider lift. Adds weight to bass and kick without mud. Source: Pultec EQP-1A service manual.