What Is the UHD14-EXB400-K?
The OREI UHD14-EXB400-K is an 18Gbps 1x4 HDMI HDBaseT splitter extender kit. It distributes one HDMI source signal to up to four remote HDMI displays over CAT6 / CAT6a / CAT7 cable, with an additional HDMI loop out on the Transmitter for a local display.
The kit includes one 18Gbps HDMI 1x4 HDBaseT splitter Transmitter and four HDBaseT Receivers. The HDMI source connects to HDMI IN on the Transmitter, the local display can connect to HDMI LOOP OUT, and the four remote displays connect through the included HDBaseT Receivers.
The UHD14-EXB400-K supports HDMI 2.0b and HDCP 2.2 / 1.x, with a video bandwidth of 18Gbps. It supports video resolutions up to 4K@60Hz 4:4:4, HDR, HDR10+, HLG, Dolby Vision, HDMI loop out, four HDBaseT outputs, IR pass-through, RS-232 pass-through, digital and analog audio de-embedding, advanced EDID management, and one-way PoC from the Transmitter to the Receivers. It extends 4K@60Hz up to 120m / 394ft and 1080p@60Hz up to 150m / 492ft over a single CAT6 / CAT6a / CAT7 cable.
The UHD14-EXB400-K is useful for commercial AV installations, conference rooms, classrooms, houses of worship, restaurants, bars, retail displays, control rooms, home theaters, and any setup where one HDMI source needs to be distributed to multiple long-distance displays.
IMPORTANT — UHD14-EXB400-K Is a 1x4 HDBaseT Splitter Extender
The UHD14-EXB400-K sends one HDMI source to four remote displays.
| Function | Support |
| 1 HDMI input | Supported |
| 1 HDMI loop output | Supported |
| 4 HDBaseT outputs | Supported |
| 4 HDBaseT Receivers | Included |
| Same source to all displays | Supported |
| Different sources to different displays | Not supported |
| Extended desktop across displays | Not supported |
This product duplicates the same HDMI source to multiple displays. It does not create independent video outputs or extended desktop screens.
IMPORTANT — Supports 4K@60Hz 4:4:4
The UHD14-EXB400-K supports video resolutions up to 4K@60Hz 4:4:4.
Supported video features include:
| Feature | Support |
| 4K@60Hz 4:4:4 | Supported |
| 18Gbps bandwidth | Supported |
| HDR | Supported |
| HDR10+ | Supported |
| HLG | Supported |
| Dolby Vision | Supported |
| HDCP 2.2 / 1.x | Supported |
To get 4K@60Hz 4:4:4, the HDMI source, displays, HDMI cables, CAT cable, and EDID setting must support the required signal.
IMPORTANT — Maximum Distance Depends on Resolution
The UHD14-EXB400-K supports different distances depending on the resolution.
| Resolution | Maximum Distance |
| 4K@60Hz | Up to 120m / 394ft |
| 1080p@60Hz | Up to 150m / 492ft |
Use high-quality CAT6 / CAT6a / CAT7 cable for best performance.
Poor cable quality, damaged connectors, patch panels, couplers, or poor terminations may reduce distance or cause signal instability.
IMPORTANT — Use Direct CAT Cable Connections
Each HDBaseT Receiver should be connected directly to the Transmitter using CAT6 / CAT6a / CAT7 cable.
Do not connect the HDBaseT outputs through:
- Network switch
- Router
- Internet network
- LAN switch
- Standard Ethernet network
- Home or office data network
This product is an HDBaseT splitter extender, not an AV-over-IP system.
IMPORTANT — One-Way PoC Is Supported
The UHD14-EXB400-K supports one-way PoC from the Transmitter to the Receivers.
This means the Transmitter can power the HDBaseT Receivers through the CAT cable.
| Power Setup | Support |
| Power Transmitter with included adapter | Supported |
| Receivers powered through CAT cable | Supported |
| Separate Receiver power required | Not normally required |
| PoC direction | Transmitter to Receiver only |
The package includes one 24V/2.7A DC locking power adapter.
If a Receiver does not power on, check the Transmitter power, CAT cable, cable termination, and HDBaseT connection.
IMPORTANT — HDMI Loop Out Is on the Transmitter
The Transmitter includes HDMI LOOP OUT.
This HDMI loop output can be used to connect a local display near the source.
Example setup:
| Location | Device |
| Source side | HDMI source connected to Transmitter HDMI IN |
| Source side | Local display connected to HDMI LOOP OUT |
| Remote side | Four displays connected through HDBaseT Receivers |
The local display and remote displays show the same HDMI source.
IMPORTANT — Audio De-Embedding Is Supported
The UHD14-EXB400-K supports digital and analog audio de-embedded output on the Transmitter.
Audio output ports include:
| Audio Output | Port Type | Supported Format |
| Coaxial Audio OUT | RCA | PCM 2.0, Dolby Digital / Plus, DTS 2.0 / 5.1 |
| L/R Audio OUT | 5-pin Phoenix connector | PCM 2.0CH |
Use the audio outputs to send sound to an amplifier, speaker system, audio receiver, or external audio device.
If analog audio does not work, set the source audio output to PCM / Stereo.
IMPORTANT — IR Pass-Through Is Supported
The UHD14-EXB400-K supports IR pass-through between the Transmitter and HDBaseT Receivers.
The package includes:
| IR Cable | Quantity |
| IR Blaster cable | 5 |
| IR Receiver cable | 5 |
IR can be used for source control from the Receiver/display side or display control from the Transmitter/source side.
Typical source-control setup:
- Connect IR Receiver cable to IR IN on the Receiver
- Connect IR Blaster cable to IR OUT on the Transmitter
- Place the IR Receiver near the remote display
- Place the IR Blaster near the source device IR window
IMPORTANT — RS-232 Pass-Through Is Supported
The UHD14-EXB400-K supports RS-232 pass-through.
RS-232 can be used for:
- Projector control
- Display control
- Control processor integration
- Matrix control
- Automation systems
- Firmware update
- Splitter command control
The RS-232 port on the Transmitter supports three functions:
| RS-232 Function | Use |
| Firmware update | Update device firmware |
| ASCII command control | Control the splitter using RS-232 commands |
| RS-232 pass-through | Send RS-232 commands between Transmitter and Receiver |
Default serial settings:
| RS-232 Setting | Value |
| Baud rate | 115200 |
| Data bits | 8 |
| Stop bits | 1 |
| Check bit | 0 |
IMPORTANT — Advanced EDID Management Is Included
The UHD14-EXB400-K includes EDID DIP switch settings and RS-232 EDID control.
EDID options include:
| EDID Type | Examples |
| 1080p | Stereo 2.0, Dolby/DTS 5.1, HD Audio 7.1 |
| 1080i | Stereo 2.0, Dolby/DTS 5.1, HD Audio 7.1 |
| 1080p 3D | Stereo 2.0, Dolby/DTS 5.1, HD Audio 7.1 |
| 4K30 4:4:4 | Stereo 2.0, Dolby/DTS 5.1, HD Audio 7.1 |
| 4K60 4:2:0 | Stereo 2.0, Dolby/DTS 5.1, HD Audio 7.1 |
| 4K60 4:4:4 | Stereo 2.0, Dolby/DTS 5.1, HD Audio 7.1 |
| 4K60 4:4:4 HDR | Stereo 2.0, Dolby/DTS 5.1, HD Audio 7.1 |
| Copy EDID | Copy from loop out or HDBaseT outputs |
| PC control mode | Supported |
Use EDID management when there is no video, incorrect resolution, audio compatibility issues, or mixed display capability.
IMPORTANT — HDMI Audio Format Support
The UHD14-EXB400-K supports HDMI audio pass-through up to 7.1CH.
Supported HDMI audio formats include:
- LPCM 2.0 / 2.1 / 5.1 / 6.1 / 7.1
- Dolby Digital
- Dolby TrueHD
- Dolby Digital Plus
- DTS-ES
- DTS-HD Master Audio
- DTS-HD HRA
- DTS:X
The connected source, displays, AVR, or audio system must also support the selected audio format.
Ports and Panel Layout
| Port / Button / Indicator | Unit | Function |
| POWER LED | Transmitter front | Red LED turns on when the device is powered |
| IN LED | Transmitter front | Green LED turns on when HDMI IN has an active source |
| LOOP LED | Transmitter front | Green LED turns on when HDMI LOOP OUT connects to an active display |
| OUT 1–4 LEDs | Transmitter front | Green LED turns on when the matching HDBaseT output connects to a Receiver |
| RS-232 | Transmitter rear | Firmware update, RS-232 commands, or RS-232 pass-through |
| IR IN | Transmitter rear | Connect IR Receiver cable |
| IR OUT | Transmitter rear | Connect IR Blaster cable |
| AUDIO OUT COAX | Transmitter rear | Digital coaxial audio output |
| AUDIO OUT L/R | Transmitter rear | Analog audio output through Phoenix connector |
| POWER Switch | Transmitter rear | Turns the device on or off |
| EDID DIP Switch | Transmitter rear | Sets EDID mode |
| HDMI IN | Transmitter rear | Connect HDMI source device |
| HDMI LOOP OUT | Transmitter rear | Connect local HDMI display |
| HDBT OUTPUT 1–4 | Transmitter rear | Connect CAT cable to HDBaseT Receivers |
| DC 24V | Transmitter rear | Connect included 24V/2.7A power adapter |
| Power Indicator | Receiver | Turns on when Receiver is powered |
| SERVICE Port | Receiver | Firmware update |
| DC 24V | Receiver | Optional local DC power input |
| HDBT IN | Receiver | Connect CAT cable from Transmitter |
| HDMI OUT | Receiver | Connect HDMI display |
| AUDIO OUT | Receiver | Connect amplifier or speaker |
| IR IN | Receiver | Connect IR Receiver cable |
| IR OUT | Receiver | Connect IR Blaster cable |
| RS-232 | Receiver | RS-232 pass-through |
Step-by-Step Setup
- Connect the HDMI source device to HDMI IN on the Transmitter.
Examples include a Blu-ray player, cable box, HDMI matrix output, media player, streaming device, laptop, DVR, or NVR. - Connect a local display to HDMI LOOP OUT on the Transmitter if needed.
- Connect HDBT OUTPUT 1 on the Transmitter to HDBT IN on Receiver 1 using CAT6 / CAT6a / CAT7 cable.
- Repeat for HDBT OUTPUT 2, 3, and 4 if using more remote displays.
- Connect each Receiver HDMI OUT to its display.
- Connect the included DC 24V/2.7A locking power adapter to the Transmitter.
- Turn on the Transmitter using the POWER switch.
- If using audio de-embedding, connect COAX or L/R AUDIO OUT to an amplifier, speakers, or audio system.
- If using IR control, connect IR Receiver and IR Blaster cables in the required control direction.
- If using RS-232, connect the Phoenix connector wiring between the control system and the device.
- Set the EDID DIP switch based on the required resolution and audio format.
- Power on the HDMI source and displays.
- Check the POWER, IN, LOOP, OUT, connection, and data signal indicators.
- Test video, audio, HDMI loop out, IR, RS-232, and audio output.
CAT Cable Requirement — Critical
Use high-quality CAT6 / CAT6a / CAT7 cable.
| Resolution | Cable Type | Distance |
| 4K@60Hz | CAT6 / CAT6a / CAT7 | Up to 120m / 394ft |
| 1080p@60Hz | CAT6 / CAT6a / CAT7 | Up to 150m / 492ft |
Poor CAT cable may cause:
- No video
- Flickering
- Black screen
- Receiver not powering on
- Poor connection signal indicator
- HDBaseT link failure
- Audio dropouts
- IR control issues
- RS-232 issues
- 4K@60Hz not working
Use direct CAT cable runs whenever possible.
HDMI Cable Requirement — Critical
Use HDMI cables rated for 18Gbps when using 4K@60Hz 4:4:4.
Poor HDMI cables may cause:
- No picture
- Flickering
- Black screen
- HDR issues
- Audio dropouts
- HDCP handshake issues
- No signal on HDMI loop out
- No signal on HDBaseT outputs
For troubleshooting, test the HDMI source directly with the display before using the splitter extender.
Power Requirement — Critical
The UHD14-EXB400-K uses one DC 24V/2.7A locking power adapter connected to the Transmitter.
| Unit | Power |
| Transmitter | DC 24V/2.7A |
| Receivers | Powered by Transmitter through CAT cable using one-way PoC |
| Receiver local power | Optional DC 24V/1A if needed |
If a Receiver does not power on, check the Transmitter power, CAT cable, and HDBT link.
Understanding the Transmitter
The Transmitter is installed near the HDMI source.
It has:
- HDMI IN
- HDMI LOOP OUT
- Four HDBT outputs
- COAX audio output
- L/R analog audio output
- IR IN and IR OUT
- RS-232
- EDID DIP switch
- DC 24V power input
- POWER switch
- POWER, IN, LOOP, and OUT LEDs
The Transmitter splits the HDMI source and sends it to the local HDMI loop display and four HDBaseT Receivers.
Understanding the Receiver
Each Receiver is installed near a remote HDMI display.
Each Receiver has:
- HDBT IN
- HDMI OUT
- AUDIO OUT
- IR IN and IR OUT
- RS-232
- SERVICE port
- Optional DC 24V input
- Power, connection, and data signal indicators
The Receiver receives HDMI over HDBaseT and outputs it to the connected display.
Understanding HDMI Loop Out
The HDMI LOOP OUT port on the Transmitter lets you connect a local display near the source.
The local display and all remote HDBaseT displays show the same HDMI source.
This is useful for AV racks, control rooms, classrooms, and commercial installations where a source-side preview display is needed.
Understanding Audio De-Embedding
Audio de-embedding allows the Transmitter to output audio separately from the HDMI signal.
| Output | Use |
| COAX audio OUT | Digital audio to AVR, amplifier, or audio receiver |
| L/R audio OUT | Analog PCM stereo to amplifier or speakers |
If audio does not work from the L/R output, set the HDMI source to PCM / Stereo.
Understanding IR Pass-Through
IR pass-through allows remote control signals to travel between the Transmitter and Receivers.
Use the IR Receiver cable where the remote control will be pointed.
Use the IR Blaster cable near the device being controlled.
The IR working distance listed in the manual is:
| IR Receiver Angle | Working Distance |
| ±45° | 0–5m |
| ±90° | 0–8m |
Do not swap IR Receiver and IR Blaster cables because their pin definitions are different.
Understanding RS-232 Pass-Through
RS-232 pass-through sends control commands between the Transmitter and Receivers.
The Transmitter RS-232 can also be used for ASCII command control of the splitter.
Common RS-232 uses include:
- Display control
- Projector control
- Control processor integration
- Firmware update
- EDID control
- Output stream control
- RS-232 routing to HDBaseT outputs
Understanding Signal Indicators
| Indicator | Status | Meaning |
| Connection Signal Green | Illuminating | Transmitter and Receiver are in good connection status |
| Connection Signal Green | Flashing | Transmitter and Receiver are in poor connection status |
| Connection Signal Green | Dark | Transmitter and Receiver are not connected |
| Data Signal Orange | Illuminating | HDMI signal with HDCP |
| Data Signal Orange | Flashing | HDMI signal without HDCP |
| Data Signal Orange | Dark | No HDMI signal |
Use these indicators to troubleshoot CAT cable, HDBaseT link, HDCP, and HDMI input issues.
Supported Video and Audio
The UHD14-EXB400-K supports video formats including:
| Supported Video |
| Up to 4K@60Hz 4:4:4 |
| RGB 4:4:4 |
| YCbCr 4:4:4 |
| YCbCr 4:2:2 |
| YCbCr 4:2:0 |
| HDR |
| HDR10+ |
| HLG |
| Dolby Vision |
Supported HDMI audio formats include:
| Supported HDMI Audio |
| LPCM 2.0 / 2.1 / 5.1 / 6.1 / 7.1 |
| Dolby Digital |
| Dolby TrueHD |
| Dolby Digital Plus |
| DTS-ES |
| DTS-HD Master Audio |
| DTS-HD HRA |
| DTS:X |
Supported de-embedded audio:
| Audio Output | Supported Format |
| Coaxial | PCM 2.0, Dolby Digital / Plus, DTS 2.0 / 5.1 |
| Analog L/R | PCM 2.0CH |
Supported Technical Specifications
| Specification | Support |
| HDMI Version | HDMI 2.0b |
| HDCP Version | HDCP 2.2 / 1.x |
| Video Bandwidth | 18Gbps |
| Maximum Resolution | 4K@60Hz 4:4:4 |
| HDR | HDR, HDR10+, HLG, Dolby Vision |
| HDMI Input | 1 |
| HDMI Loop Output | 1 |
| HDBaseT Outputs | 4 |
| Included Receivers | 4 |
| CAT Cable | CAT6 / CAT6a / CAT7 |
| 4K@60Hz Distance | Up to 120m / 394ft |
| 1080p@60Hz Distance | Up to 150m / 492ft |
| Audio De-Embedding | Coaxial and analog L/R |
| IR | Pass-through supported |
| RS-232 | Command control and pass-through |
| EDID Management | DIP switch and RS-232 control |
| PoC | One-way, Transmitter to Receiver |
| Power Supply | DC 24V/2.7A |
| Power Consumption | 35W |
| Transmitter Dimensions | 220mm x 130mm x 40mm |
| Receiver Dimensions | 140mm x 65mm x 18mm |
| Transmitter Weight | 853g |
| Receiver Weight | 246g |
| Housing | Metal enclosure |
| Color | Black |
| Operating Temperature | 0°C to 40°C / 32°F to 104°F |
| Storage Temperature | -20°C to 60°C / -4°F to 140°F |
| Relative Humidity | 20–90% RH, non-condensing |
What Source Devices Is the UHD14-EXB400-K Compatible With?
The UHD14-EXB400-K is compatible with HDMI source devices such as:
- Blu-ray players
- Cable boxes
- Satellite receivers
- Streaming devices
- Media players
- Desktop PCs
- Laptops with HDMI output
- Game consoles
- DVRs
- NVRs
- HDMI matrix outputs
- HDMI switch outputs
- AV receivers with HDMI output
The source must output a supported HDMI resolution up to 4K@60Hz.
What Displays Is the UHD14-EXB400-K Compatible With?
The UHD14-EXB400-K can connect to HDMI displays such as:
- 4K TVs
- 1080p TVs
- Projectors
- Monitors
- Commercial displays
- Digital signage displays
- Classroom displays
- Conference room displays
- Church displays
- Restaurant TVs
- Bar displays
- Retail displays
- Local display near the source
For 4K@60Hz, the display must support 4K@60Hz input.
What Audio Devices Is the UHD14-EXB400-K Compatible With?
The audio outputs can connect to:
- Amplifiers
- AV receivers
- Powered speakers
- Audio processors
- Distributed audio systems
- Classroom audio systems
- Conference room audio systems
Use COAX output for digital audio and L/R output for analog stereo audio.
Frequently Asked Questions
Q: What is the OREI UHD14-EXB400-K used for?
A: The UHD14-EXB400-K is used to split and extend one HDMI source to four remote HDMI displays over CAT6 / CAT6a / CAT7 cable using HDBaseT technology.
Q: Is the UHD14-EXB400-K a splitter or extender?
A: It is both. It is a 1x4 HDMI HDBaseT splitter extender.
Q: How many HDMI inputs does it have?
A: It has one HDMI input.
Q: How many HDBaseT outputs does it have?
A: It has four HDBaseT outputs.
Q: How many Receivers are included?
A: Four HDBaseT Receivers are included.
Q: Does it support a local display?
A: Yes. The Transmitter has HDMI LOOP OUT for a local display.
Q: Does the UHD14-EXB400-K support 4K@60Hz?
A: Yes. It supports up to 4K@60Hz 4:4:4.
Q: Does it support 8K?
A: No. It supports up to 4K@60Hz.
Q: Does it support 4K@120Hz?
A: No. It does not support 4K@120Hz.
Q: What HDMI version does it support?
A: It supports HDMI 2.0b.
Q: What HDCP version does it support?
A: It supports HDCP 2.2 and HDCP 1.x.
Q: What video bandwidth does it support?
A: It supports 18Gbps video bandwidth.
Q: Does it support HDR?
A: Yes. It supports HDR, HDR10+, HLG, and Dolby Vision.
Q: How far can it extend 4K@60Hz?
A: It extends 4K@60Hz up to 120m / 394ft over CAT6 / CAT6a / CAT7 cable.
Q: How far can it extend 1080p@60Hz?
A: It extends 1080p@60Hz up to 150m / 492ft over CAT6 / CAT6a / CAT7 cable.
Q: Can I connect the HDBaseT outputs through a network switch?
A: No. The HDBaseT outputs should connect directly to the included Receivers.
Q: Is this AV over IP?
A: No. This is an HDBaseT splitter extender, not an AV-over-IP system.
Q: Does it support PoC?
A: Yes. It supports one-way PoC from the Transmitter to the Receivers.
Q: Do the Receivers need separate power adapters?
A: Normally no. The Receivers can be powered by the Transmitter through the CAT cable.
Q: What power adapter is included?
A: The package includes one 24V/2.7A DC locking power adapter.
Q: Does it support audio extraction?
A: Yes. It supports digital coaxial and analog L/R audio de-embedded output.
Q: What audio formats are supported through HDMI?
A: It supports LPCM up to 7.1, Dolby Digital, Dolby TrueHD, Dolby Digital Plus, DTS-ES, DTS-HD Master Audio, DTS-HD HRA, and DTS:X.
Q: What audio formats are supported from the coaxial output?
A: Coaxial output supports PCM 2.0, Dolby Digital / Plus, and DTS 2.0 / 5.1.
Q: What audio format is supported from analog L/R output?
A: Analog L/R output supports PCM 2.0CH.
Q: Does it support IR control?
A: Yes. IR pass-through is supported.
Q: Does it support RS-232?
A: Yes. RS-232 command control and RS-232 pass-through are supported.
Q: What is the default RS-232 baud rate?
A: The default baud rate is 115200.
Q: Does it support EDID management?
A: Yes. It supports EDID through DIP switch settings and RS-232 commands.
Q: Can it copy EDID from the local loop display?
A: Yes. It can copy EDID from HDMI LOOP OUT.
Q: Can it copy EDID from an HDBaseT output?
A: Yes. It can copy EDID from HDBT OUT 1, 2, 3, or 4.
Q: Does it create extended desktop across four displays?
A: No. It duplicates one HDMI source to the connected displays.
Q: What should I do if there is no video?
A: Check the power adapter, HDMI source, HDMI cables, CAT cable, EDID setting, HDBT output connection, and the connection/data signal indicators.
Q: What should I do if the connection indicator is flashing?
A: The Transmitter and Receiver are in poor connection status. Check CAT cable quality, terminations, cable length, and direct connection.
Q: What should I do if the connection indicator is dark?
A: The Transmitter and Receiver are not connected. Check the CAT cable and confirm HDBT OUT is connected to HDBT IN.
Q: What should I do if the data signal indicator is dark?
A: There is no HDMI signal. Check the HDMI source, HDMI cable, and source output setting.
Q: What should I do if 4K@60Hz does not work?
A: Use 18Gbps HDMI cables, high-quality CAT6 / CAT6a / CAT7 cable, keep the run within 120m / 394ft, confirm the source and display support 4K@60Hz, and choose a compatible EDID setting.
Q: What should I do if analog audio output does not work?
A: Set the HDMI source audio output to PCM / Stereo and connect the L/R output to an amplifier or speaker.
Q: What should I do if IR control does not work?
A: Confirm the IR Receiver and IR Blaster cables are connected in the correct direction and that the IR Blaster is placed near the controlled device’s IR sensor.
Q: What should I do if RS-232 does not work?
A: Check the Phoenix connector wiring, baud rate, RS-232 routing, and control command format.
Q: Does the UHD14-EXB400-K need external power?
A: Yes. Connect the included DC 24V/2.7A locking power adapter to the Transmitter. The Receivers are powered through the CAT cables by PoC.
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