Here’s 2 screen caps of the same VST instrument playing through the channel.
filter Hz:
HC is at 18306Hz
LC is at 126Hz
In the 1st image the HPF and LPF in the PRE section are NOT engaged.
** peak shown on fader is -3db
In the 2nd the HPF and LPF in the PRE section ARE engaged.
**
peak shown on fader is -1.8db
To better illustrate here’s the same test with CurveEQ loaded post fader
and the curve set to average and
the capture was taken AFTER the settle to stable unchanging average was reached.
In the 1st image the HPF and LPF in the PRE section are NOT engaged.
** peak shown on fader is -3db
In the 2nd the HPF and LPF in the PRE section ARE engaged.
** peak shown on fader is -1.8db