1. Introduction
The PROZOR 192K Bi-Directional Coaxial Optical Converter is designed to convert digital audio signals between Coaxial and Optical (Toslink) formats. This device allows for flexible audio connections, supporting both Coaxial to Optical/Coaxial and Optical to Coaxial/Optical conversions. It is suitable for various home audio setups, ensuring high-quality audio transmission.
2. Package Contents
Verify that all items listed below are included in your package:
- 1 x PROZOR Bi-directional Coaxial to Optical Converter
- 1 x 2m SPDIF Optical Toslink Cable
- 1 x 1m Coaxial Cable
- 1 x USB Power Cable
- 1 x User Manual

3. Product Overview
The PROZOR Bi-Directional Coaxial Optical Converter features multiple input and output ports, along with an input selector switch and a power indicator. Understanding these components is crucial for proper operation.
3.1 Front Panel
- Coaxial Input: Connects to a coaxial digital audio source.
- Optical Toslink Input: Connects to an optical digital audio source.
- Input Selector Switch: Toggles between Coaxial and Optical inputs.
3.2 Rear Panel
- Coaxial Output: Connects to a coaxial digital audio receiver.
- Optical Toslink Output: Connects to an optical digital audio receiver.
- DC 5V/1A Power In: Connects to the provided USB power cable for power supply.
- Power Indicator: A red LED light that indicates the device is powered on.

4. Setup Instructions
Follow these steps to connect your PROZOR Bi-Directional Coaxial Optical Converter:
- Power Connection: Connect the provided USB power cable to the DC 5V/1A port on the converter. Plug the other end into a USB power adapter (not included) or a USB port on your TV/device. The red power indicator light will illuminate.
- Audio Source Connection:
- If your audio source (e.g., TV, DVD player) has a Coaxial output, connect it to the Coaxial Input port on the converter using a coaxial cable.
- If your audio source has an Optical (Toslink) output, connect it to the Optical Toslink Input port on the converter using an optical cable.
- Audio Receiver Connection:
- Connect the Coaxial Output port on the converter to your audio receiver (e.g., soundbar, amplifier) using a coaxial cable.
- Connect the Optical Toslink Output port on the converter to your audio receiver using an optical cable.
- Input Selection: Use the Input Selector Switch on the converter to choose the active input (Coaxial or Toslink) that matches your audio source connection.

5. Operating Instructions
The converter offers flexible bi-directional audio signal conversion. Both output ports (Coaxial and Optical Toslink) can work simultaneously, providing audio to multiple devices.
5.1 Input Selection
Use the Input Selector Switch on the front panel to choose between the Coaxial and Optical Toslink inputs. Ensure the switch is set to match the input port where your audio source is connected.
5.2 Bi-directional Modes
The converter supports four primary modes of operation:
- Mode 1: Digital Coaxial Input to Digital Coaxial Output
- Mode 2: Digital Coaxial Input to Optical Toslink Output
- Mode 3: Optical Toslink Input to Digital Coaxial Output
- Mode 4: Optical Toslink Input to Optical Toslink Output
In Modes 1 and 2, the input is Coaxial. In Modes 3 and 4, the input is Optical Toslink. Both Coaxial and Optical Toslink outputs will transmit the selected input signal simultaneously.

6. Troubleshooting
If you encounter issues with your converter, refer to the following common problems and solutions:
- No Audio Output:
- Ensure the converter is properly powered, and the red power indicator is on.
- Verify all audio cables (Coaxial/Optical) are securely connected to both the source and the receiver.
- Check that the Input Selector Switch on the converter matches the active input source.
- Confirm that your audio source is outputting a digital audio signal.
- Ensure your audio receiver is set to the correct input channel.
- Distorted or Intermittent Audio:
- Check for damaged or loose audio cables. Replace if necessary.
- Ensure the audio format from your source is supported by the converter and your receiving device (LPCM2.0/ DTS/ Dolby AC3/ 5.1CH).
- Reduce the volume on the source device or receiver to check for clipping.
- No 5.1CH Surround Sound:
- Verify that your audio source is outputting a 5.1CH signal (e.g., DTS or Dolby AC3).
- Ensure your audio receiver and speakers are configured for 5.1CH surround sound.
7. Specifications
| Manufacturer | PROZOR |
| Model Number | Optical Converter |
| Item Weight | 180 g |
| Product Dimensions | 4.9 x 4.8 x 0.25 cm |
| Material | Metal |
| Interface Type | Coaxial, Optical (Toslink) |
| Supported Audio Formats | LPCM2.0, DTS, Dolby AC3, 5.1CH |
| Sampling Rate Support | 32KHz, 44.1KHz, 48KHz, 96KHz, 192KHz (24bit) |
| Power Supply | DC 5V/1A (via USB cable) |
| Wattage | 3 watts |
| Operating Temperature | Up to 40 Degrees Celsius |

8. Maintenance
To ensure the longevity and optimal performance of your PROZOR Bi-Directional Coaxial Optical Converter, follow these maintenance guidelines:
- Cleaning: Use a soft, dry cloth to clean the exterior of the device. Avoid using liquid cleaners or abrasive materials, as they may damage the finish or internal components.
- Storage: Store the converter in a cool, dry place away from direct sunlight, high temperatures, and humidity when not in use for extended periods.
- Handling: Handle the device with care. Avoid dropping it or subjecting it to strong impacts.
- Ventilation: Ensure the device has adequate ventilation to prevent overheating. Do not block any vents.
9. Warranty and Support
PROZOR products are designed for reliability and performance. For any technical support or warranty inquiries, please refer to the contact information provided with your purchase or visit the official PROZOR website. Keep your purchase receipt as proof of purchase for warranty claims.





