To engage a pre-eq send, which setting must the Aux Send be set to?

To engage a pre-eq send, the Aux Send must be set to Pre-Fader. This setting allows the signal to be sent to the auxiliary bus before the channel fader. As a result, any adjustments made to the channel fader will not affect the level of the signal being sent to the auxiliary effects or monitor system. This is especially useful in live sound situations or when mixing for recording, where maintaining a consistent signal level for effects or monitors is crucial regardless of the fader position on the channel strip.

The pre-fader setting ensures that the signal is sent with the original volume and tone that is unaffected by any changes to the fader after it.