With the REV button up on a Neotek Elite, the monitor fader's output is directed to the studio monitors or an alternate monitoring path for the audio engineer's listening.
When the REV button is up on a Neotek Elite mixing console, the output of the monitor fader is typically routed to the studio monitors or an alternate monitoring path, such as a secondary set of studio speakers or a headphone distribution system. This allows the audio engineer to listen to the mix or other sources through their chosen monitoring system without affecting the main mix output. The specific signal routing can vary depending on the particular setup and configuration of the studio's recording equipment.