Introduction
The OREI XD-4000 is a 4K HDMI video scaler with audio extraction designed for professional AV, conference rooms, digital signage, and home theater installations. It accepts an HDMI input, scales the video to a selected output resolution, and extracts audio to both S/PDIF and 3.5 mm outputs for flexible integration with displays, receivers, soundbars, and analog audio systems.
What Is the XD-4000?
The XD-4000 is an HDMI 2.0 scaler and audio extractor that processes high-resolution video from a source device and outputs it at a resolution that best matches the connected display. It supports input signals up to 4K at 60Hz 4:4:4 HDR and can output up to 4K at 60Hz RGB 8-bit, with downscaling available all the way to 640×480 at 60Hz. Resolution and EDID settings are configured using DIP switches, and RS-232 is available for advanced control.
This makes the XD-4000 a practical solution when you need to match source output to display capability, improve compatibility between devices, or route audio separately from video in a clean, reliable installation.
Product at a Glance
| Port / Control | Location | Function |
|---|---|---|
| HDMI IN | Rear | Connect the HDMI source device. |
| RES DIP Switches | Panel | Select the output resolution. |
| EDID DIP Switches | Panel | Select the EDID configuration. |
| FW Port | Panel | Used for firmware updates. |
| HDMI OUT | Rear | Connect the display. |
| SPDIF OUT | Rear | Connect a digital audio device. |
| L/R OUT | Rear | Connect an analog audio device using 3.5 mm stereo output. |
| RS-232 | Rear | Enable serial control for advanced functions. |
| Power LED | Front | Green indicates power on; red indicates standby. |
| DC 12V | Rear | Connect the 12V/1A power adapter. |
Key Features
- HDMI 2.0 support
- HDCP 2.2 and HDCP 1.4 compatibility
- 18Gbps bandwidth for high-resolution video signals
- Accepts input up to 4K at 60Hz 4:4:4 HDR
- Outputs up to 4K at 60Hz RGB 8-bit
- Downscales to 640×480 at 60Hz for legacy displays
- S/PDIF audio extraction
- 3.5 mm analog audio extraction
- Selectable EDID via DIP switches
- Selectable resolution via DIP switches
- RS-232 control for advanced configuration
- CEC pass-through support
- Compact design for easy integration
Technical Specifications
| Specification | Details |
|---|---|
| HDMI Input | 1× HDMI 2.0 Type-A female |
| HDMI Output | 1× HDMI 2.0 Type-A female |
| Maximum Input Resolution | 4K at 60Hz 4:4:4 HDR |
| Maximum Output Resolution | 4K at 60Hz RGB 8-bit |
| Video Standard | HDMI 2.0 |
| HDCP | HDCP 2.2 |
| Bandwidth | 18Gbps |
| HDMI Audio | LPCM 2.0 |
| S/PDIF Output Audio | LPCM 2.0, 48kHz |
| 3.5 mm Output Audio | Stereo LPCM 2.0 |
| Frequency Response | 20Hz–20kHz ±1dB |
| Maximum Output Level | 2.0Vrms ±1dB |
| THD+N | <0.05% |
| Signal-to-Noise Ratio | >80dB |
| Crosstalk | <−80dB |
| RS-232 | 3-pin |
| Operating Temperature | −5°C to +55°C / 23°F to 131°F |
| Storage Temperature | −25°C to +70°C / Fahrenheit range in manual appears misprinted; verify |
| Humidity | 10% to 90% |
| Power | AC 100–240V to DC 12V/1A, ≤4.5W |
| Dimensions | 110×80×21mm / 4.33×3.15×0.83in |
| Weight | 215g / 7.58oz |
How the XD-4000 Works
Signal flow is simple: HDMI Source → XD-4000 → HDMI Display. The scaler receives the incoming HDMI signal, processes it according to the selected resolution and EDID settings, and sends the optimized video to the display while extracting audio to the available audio outputs.
Basic setup steps: connect your source to HDMI IN, connect HDMI OUT to the display, connect S/PDIF or L/R OUT if you need separate audio, and connect RS-232 if you plan to use serial control or advanced functions.
Use Cases
- Scale 4K content for different displays by matching the source output to the connected screen's supported resolution.
- Extract audio to an AV receiver, soundbar, or analog audio system through S/PDIF or 3.5 mm output.
- Connect modern HDMI sources to legacy displays by downscaling to 640×480 at 60Hz when needed.
- Manage resolution and EDID directly from the front panel using DIP switches for quick installation changes.
- Support commercial AV and conference room deployments with RS-232 control for power, resolution, EDID, mute, freeze frame, orientation, and status.
- Use in digital signage and home theater setups where reliable scaling and audio extraction are required.
Configuration and Control
The RES DIP switches control output resolution. When set to 1111, RS-232 is enabled for additional options. The EDID DIP switches control EDID selection, and when set to 111, RS-232-based EDID control is available.
RS-232 advanced functions include power and standby control, auto standby, resolution selection, EDID selection, audio mute, no-signal color, freeze frame, rotation and flip, color space, and status queries. Default serial settings are 57600 baud, 8 data bits, 1 stop bit, and no parity. Supported baud rates range from 2400 to 115200.
Compatibility Considerations
The source device and display must support the selected resolution for proper operation. EDID settings affect the video formats negotiated by the source, so choosing the right EDID can improve compatibility. Audio output is documented as LPCM 2.0, so connected audio devices must support that format. Advanced control features require RS-232, and CEC behavior depends on the connected devices.
FAQs
Q: What does the XD-4000 do?
A: It is an HDMI scaler with S/PDIF and 3.5 mm audio extraction.
Q: Does it support 4K at 60Hz?
A: Yes. It accepts input up to 4K at 60Hz 4:4:4 HDR and outputs up to 4K at 60Hz RGB 8-bit, depending on the source, configuration, and display.
Q: Can it downscale video?
A: Yes. It can downscale to 640×480 at 60Hz.
Q: Can I extract audio while sending video to the display?
A: Yes. Audio can be extracted through S/PDIF or 3.5 mm output, but source and device compatibility must be confirmed.
Q: What audio formats are supported?
A: The documented audio format is LPCM 2.0.
Q: How do I change the resolution?
A: Use the RES DIP switches. RS-232 resolution control is available when the switches are set to 1111.
Q: What is EDID?
A: EDID is the data that tells the source what the display supports. Adjusting EDID can improve compatibility.
Q: Does the XD-4000 support RS-232 control?
A: Yes. RS-232 supports power, resolution, EDID, mute, freeze, orientation, and status functions.
Q: What should I do if 4K is not displaying correctly?
A: Check source and display support, use 18Gbps cables, verify the RES switches, try a lower resolution, and confirm the color format.
Q: What should I do if audio is not working?
A: Check the source audio format, try PCM or stereo output, verify device compatibility, then reconnect and restart the system.
Q: What should I do if RS-232 is not working?
A: Check the cable and connections, verify 57600 baud, 8 data bits, 1 stop bit, and no parity, confirm the commands, then restart the device.
Q: What should I do if the resolution is wrong?
A: Check the RES switches, verify display support, review the EDID setting, reconnect HDMI, and restart the system.
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