Question

For some reason the headphones are disabled by default in the new version of universal control, As it does not come with the included software I do not know where I can activate them and send the same signal that goes to the master to work silently with my 1818vsl

Answer 1

Headphone Outs are hardwire to Outputs 7 / 8. If you set your main audio output for (Windows Default Playback or in OS X Audio MIDI Setup), then headphones will be heard.

http://support.presonus.com/hc/en-us/articles/210044543-AudioBox-VSL-Headphone-Routing-with-Mac-OS-X-Audio-MIDI-Setup

To setup headphones in your DAW, you setup a Cue Mix, here is how to do it in Studio One.

http://support.presonus.com/hc/en-us/articles/210044553-How-to-Create-Cue-Mix-with-AudioBox-1818-Headphones-and-Studio-One-on-Mac-OS-X

If you're not using Studio One, look up in your DAW documentation on how to setup a Cue Mix.