> ## 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.

# Connections

> Rear Panel and connections

Below are the connectors and functions of the MiniMixer rear panel:

<img src="https://mintcdn.com/solidyne/1PsQNXH_7vEIZ51t/images/minimixer/minimixer-panel_trasero.png?fit=max&auto=format&n=1PsQNXH_7vEIZ51t&q=85&s=c6afd737f557135d594e8f1bec9cf2a8" alt="Minimixer Rear Panel Pn" width="3840" height="1592" data-path="images/minimixer/minimixer-panel_trasero.png" />

1. **POWER SUPPLY**
   * Barrel connector (pin+ / 2 mm).
   * External switching power supply 90/240V – 50/60 Hz – 12V/1A.
   * **Use only the original power supply provided by Solidyne.**
   * The MiniMixer has no power switch: it remains active while the power supply is connected.
2. **TALLY LIGHT (On-air light)**
   * Barrel connector (pin + / 2.5 mm).
   * Provides 12 VDC with maximum load of 200 mA.
   * When connecting the on-air light, headphone output #1 is automatically muted whenever microphones go on-air.
3. **USB AUDIO**
   * USB A/B port for digital stereo input/output to computer.
   * The operating system (Windows 7/10 or higher) detects two devices:
     * **USB Playback Device** (stereo input to console).
     * **USB Recording Device** (stereo output from console with PGM signal).
   * Cable length should not exceed 4 meters.
   * Always ensure proper computer grounding to prevent damage.
4. **MICROPHONES**
   * Four balanced XLR inputs for dynamic microphones.
   * **MIC-3** and **MIC-4** inputs share the same fader.
   * Using microphones of the same model on these two inputs is recommended for better level matching.
5. **HEADPHONES**
   * Four outputs on 1/8" TRS connector (minijack).
   * A single control adjusts the overall headphone level (CUE MONITOR section).
   * **Headphone #1** output can be used for powered monitors.
   * When tally light is connected, this output automatically mutes when microphones open.
6. **LANDLINE TELEPHONE (POTS)**

   * RJ11 connector for 2-wire line.
   * Includes **NULL** adjustment preset for hybrid rejection calibration (see adjustment procedure).
   * The line can connect directly to public network or PBX (in the latter case rejection quality may decrease).
   * Internal surge protection via varistors.
   * Additional external protection with gas discharge tubes and fuses is recommended.

   <Warning>
     Damage from atmospheric discharges is not covered by warranty. Surge protection is recommended in storm-prone areas.
   </Warning>
7. **STEREO LINE**
   * Unbalanced 1/4" TRS stereo input.
8. **PROGRAM INSERT**
   * 1/4" TRS stereo input/output.
   * Allows inserting an external processor in the PGM signal sent to USB.
   * Useful for applying multiband processing or effects before streaming.
9. **PROGRAM OUTPUT**
   * 1/4" TRS stereo output.
   * Contains the mix of microphones, USB, auxiliary line and telephone lines.
10. **MICROPHONE MIX OUTPUT (REC OUT)**
    * 1/8" stereo minijack output.
    * Delivers exclusively the microphone mix (post compressor).
    * Allows voice recording even when console is broadcasting other content.
11. **SMART-CAM (optional)**
    * Mini USB connector.
    * Sends microphone status to PC for automated camera switching.
    * Used with **Audicom Video** and streaming service.