> ## Documentation Index
> Fetch the complete documentation index at: https://docs.solidyne.ar/llms.txt
> Use this file to discover all available pages before exploring further.

# Monitoring with dual talkback channel

> Connection and use of Studiobox with dual talkback channel on UX18

UX18 allows configuring its outputs to use the **AUX** input of StudioBox units with separate talkback circuits. This way, the operator can talk privately to a group of headphones, or to all participants.

<img src="https://mintcdn.com/solidyne/vu2yUaPTlYfmFAA1/images/ux24/studiobox-doble-talkback.png?fit=max&auto=format&n=vu2yUaPTlYfmFAA1&q=85&s=f5ec591899f5c1ffb1f908e4c2707ab3" alt="Studiobox Double Talkback Pn" width="1489" height="1086" data-path="images/ux24/studiobox-doble-talkback.png" />

The diagram shows the connection and configuration of **StudioBox HD5** with dual talkback channel on a UNIDEX UX-18.\
For **StudioBox HD3**, the connection is the same.

### Connection

* The **STUDIO MONITOR** input of the StudioBox connects to the **STUDIO MONITOR** output on the console, using a pin-to-pin STP RJ45 to RJ45 cable (SOL P25 or P50 cables).
* The **AUX-IN** input of StudioBox connects to an **assignable output** on the console (OUT1 to OUT4) using a pin-to-pin STP RJ45 to RJ45 cable (SOL P25 or P50 cables).

### Configuration

* On StudioBox, assign one or more headphones to the **AUX** input.
* On UX18, the output connected to AUX IN is configured as follows (see SETTINGS → OUTPUTS):
  * **Source:** `STUDIO`. The output signal follows the assignment made in the *MONITOR* screen.
  * **Talk-Back Ch:** Select a channel (or group) to link it to the output.\
    When activating Talk-Back on that channel, the signal will be sent through this output to the headphones assigned to **AUX IN**.\
    For example: to talk privately to *MIC-1* headphones, "Talk-Back Ch" will be assigned to the MIC-1 channel.
  * **Studio Talk-Back link:** `Enabled`.

### Operation

* With the above configuration, all headphones hear the signal assigned on the console for Studio monitoring (MONITOR screen).
* The **main Talk-Back button** allows talking to all headphones through the talkback microphone.
* The **CUE/SELECT button** of the linked channel or group allows talking **only** to the headphones assigned to AUX.\
  To do this, press and hold **CUE/SELECT** on the channel.\
  The channel display will show `TLBK`.