> ## 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.

# Specifications

> Description of your new file.

<Accordion title="Technology">
  * **VQR** system for voice quality reconstruction.
  * Active hybrid with floating balanced telephone lines, ground-isolated through Nickel-Ferrite transformers.
  * 3rd order bandpass filter in console return to improve rejection and eliminate crosstalk in conferences.
  * Rejection adjustment with internal 1 kHz generator and VU meter measurement.
  * **Bluetooth 4.0 (Class2 +4dBm max)** with WideBand Voice (HD Telephony): 20 Hz – 7 kHz for calls / 20–20 kHz for music reception.
  * Supported Bluetooth profiles: HSP v1.2 / HFP v1.6 / A2DP v1.2.
</Accordion>

<Accordion title="Level Control">
  * Input and output level adjustment with two LED VU meters.
  * **Priority System**: gives priority to the host, attenuating the interviewee by 12 dB when the host speaks.
</Accordion>

<Accordion title="Inputs">
  * 4 inputs: 2 for hybrid landlines (POTS) or digital telephony, and 2 wireless inputs for mobile phones via Bluetooth or VoIP phones.
  * Bluetooth inputs can be used for both mobile phones and VoIP, allowing unlimited extension of digital lines.
  * All 4 lines can be combined in conference with cross-gain control through a single console attenuator.
  * The 2 physical line inputs are transformer-isolated.
  * External Bluetooth antennas for extended range outside metal chassis.
  * 1 return input from console (Mix-Minus or auxiliary bus).
  * Compatible with consoles without dedicated Mix-Minus output.
</Accordion>

<Accordion title="Call Control">
  * Through illuminated buttons with status indication and RING flash.
  * **Private Call Attention**: a Talkback button enables private conversation with the caller before putting them on air or ending the call.
</Accordion>

<Accordion title="Input and Output Levels">
  * Unbalanced input with PLUG connector. Range: –10 to +12 dBu (nominal +4 dBu).
  * Level adjustment via front panel potentiometer with LED VU indicator.
  * Balanced output with XLR connector, nominal level +4 dBu.
  * Unbalanced stereo output (PLUG) for headphones.
  * Direct outputs for **Telephone Line-1** and **Bluetooth-1**, unbalanced, nominal level 0 dBu.
</Accordion>

<Accordion title="Audio Performance">
  **FREQUENCY RESPONSE**

  * With VQR enabled: 50 Hz – 12,000 Hz.
  * Without VQR: from telephone lines, 300 Hz – 3,400 Hz.
  * From Bluetooth mobile: 50 Hz – 8,000 Hz (call mode) // 20–20,000 Hz (music mode).

  **SIGNAL-TO-NOISE RATIO**

  * With VQR enabled: 70 dBA.
  * Without VQR: 50 dBA.

  **HARMONIC DISTORTION (THD)**

  * Less than 0.2%
</Accordion>

<Accordion title="Hybrid Rejection">
  * Greater than 40 dB for +4 dBu send @ 1 kHz. Measured with 2 km artificial line.
  * Rejection adjustment with internally generated 1 kHz tone.
</Accordion>

<Accordion title="Surge Protection">
  * Metal oxide varistors (SIOV).
  * Withstands surges up to 2,000 V in laboratory tests.
</Accordion>

<Accordion title="Power Supply">
  * Internal stabilized switching power supply, 110/220 V – 50/60 Hz.
  * Power consumption: 20 W.
</Accordion>

<Accordion title="Dimensions">
  * 19" Rack (1U). Height: 44 mm. Depth: 230 mm.
  * Front panel with mounting ears: 483 mm.
  * Includes rubber feet for desktop use.
  * Package: 550 × 300 × 100 mm. Weight: 3 kg.
</Accordion>