HD-104 Overview and Use Cases

What Is the HD-104?

The OREI HD-104 is a 10.2Gbps 1x4 HDMI splitter. It takes one HDMI source and duplicates the same audio/video signal to up to four HDMI displays at the same time.

The HDMI source connects to HDMI IN, and up to four TVs, monitors, projectors, or displays connect to HDMI OUT 1 through HDMI OUT 4.

The HD-104 supports HDMI 1.4 and HDCP 1.4, with video resolutions up to 4K@30Hz 4:4:4, 1080p@60Hz, 3D formats, HDR, Dolby Vision, EDID management, and HDMI audio pass-through. The manual’s application diagram shows a DVD or Blu-ray player connected to HDMI IN and multiple displays such as a TV, projector, and display connected to the HDMI outputs.

The HD-104 is useful for conference rooms, classrooms, lecture halls, trade shows, retail displays, restaurants, bars, bedrooms, living rooms, kitchens, outdoor spaces, and any setup where one HDMI source needs to be shown on up to four displays.

IMPORTANT — HD-104 Is a 1x4 HDMI Splitter

The HD-104 duplicates one HDMI source to four HDMI outputs.

This product mirrors one HDMI source. It does not create independent video outputs and does not extend a PC desktop across four screens.

IMPORTANT — Supports 4K@30Hz 4:4:4

The HD-104 supports video resolutions up to 4K@30Hz 4:4:4.

This model does not support 4K@60Hz. For 4K@60Hz distribution, use an HDMI 2.0 / 18Gbps splitter model.

IMPORTANT — HDMI 1.4 / HDCP 1.4

The HD-104 supports HDMI 1.4 and HDCP 1.4.

Make sure the HDMI source, displays, and protected content are compatible with HDCP 1.4.

IMPORTANT — This Product Does Not Downscale 4K to 1080p

The manual’s troubleshooting section states that the HD-104 does not downscale 4K to 1080p.

If a 1080p monitor does not display video from a 4K source, set the media source output resolution to 1080p.

IMPORTANT — EDID STD / TV Modes Are Included

The HD-104 has an EDID dial switch with STD and TV modes.

Use EDID settings when there is no video, wrong resolution, audio compatibility issue, or mixed display problem.

IMPORTANT — TV EDID Mode Uses HDMI OUT 1

In TV mode, the HD-104 copies the EDID from HDMI OUT 1 and applies it to all outputs.

For best results, connect the main or most compatible display to HDMI OUT 1 when using TV EDID mode.

IMPORTANT — All Displays Show the Same Content

The HD-104 sends the same HDMI source to all connected displays.

If a laptop or PC is connected, the splitter duplicates the screen. It does not create four separate extended monitors.

IMPORTANT — This Is Not an Audio Extractor

The HD-104 supports HDMI audio pass-through, but it does not provide separate audio output ports.

If separate audio output is needed for speakers, amplifier, or soundbar, use an HDMI splitter with audio extraction or a dedicated HDMI audio extractor.

Ports and Panel Layout

Step-by-Step Setup

1. Connect the HDMI source device to HDMI IN on the HD-104. 
   Examples include a DVD player, Blu-ray player, cable box, satellite receiver, streaming device, laptop, desktop PC, DVR, NVR, or game console.
2. Connect HDMI OUT 1 to the first display.
3. Connect HDMI OUT 2, HDMI OUT 3, and HDMI OUT 4 to additional displays as needed.
4. Connect the included DC 5V/1A power adapter.
5. Set the EDID switch to STD or TV.
6. Power on the HDMI source, displays, and splitter.
7. Check that the Power LED is on.
8. Check the IN LED to confirm the source is detected.
9. Check OUT 1–4 LEDs to confirm connected displays are detected.
10. Test video and HDMI audio on all connected displays.

HDMI Cable Requirement — Critical

Use high-quality HDMI cables.

The manual recommends using Premium High Speed HDMI cables.

Poor HDMI cables may cause:

1. No video
2. Flickering
3. Black screen
4. One output not working
5. 4K not working
6. HDR issues
7. HDCP handshake issues
8. Audio dropouts 
    
   For troubleshooting, test each HDMI cable directly between the source and display.

Power Requirement — Critical

The HD-104 uses a DC 5V/1A power adapter.

If the Power LED does not turn on, check the power adapter, outlet, and DC 5V connection.

Understanding STD EDID Mode

STD mode uses a default EDID setting.

Use STD mode when:

1. You are using 1080p displays
2. Some displays do not show video
3. You want a stable 1080p stereo signal
4. Mixed displays are causing handshake issues
5. Audio compatibility problems occur 
    
   STD mode sets all HDMI outputs to 1080p@60Hz with 2-channel audio.

Understanding TV EDID Mode

TV mode copies EDID from HDMI OUT 1.

Use TV mode when:

1. HDMI OUT 1 is the main display
2. The source should follow the capability of the display connected to OUT 1
3. All connected displays support the same format as OUT 1
4. You want the source to output the best format supported by the main display 
    
   If a lower-resolution display is connected to another output, it may not show video if it cannot support the copied EDID format.

Understanding the Application Example

The application diagram shows one DVD or Blu-ray player connected to HDMI IN. The HD-104 then distributes the same signal to multiple display devices, including a TV, projector, and display.

This demonstrates the main use case: one HDMI source shown on up to four HDMI displays at the same time.

Supported Video and Audio

The HD-104 supports video formats including:

Supported HDMI audio formats include:

Supported Technical Specifications

What Source Devices Is the HD-104 Compatible With?

The HD-104 is compatible with HDMI source devices such as:

1. DVD players
2. Blu-ray players
3. Cable boxes
4. Satellite receivers
5. Streaming devices
6. Media players
7. Desktop PCs
8. Laptops with HDMI output
9. DVRs
10. NVRs
11. Game consoles
12. HDMI switch outputs
13. HDMI matrix outputs 
     
    The source must output a supported HDMI resolution up to 4K@30Hz.

What Displays Is the HD-104 Compatible With?

The HD-104 can connect to HDMI displays such as:

1. 4K TVs
2. 1080p TVs
3. Monitors
4. Projectors
5. Commercial displays
6. Digital signage displays
7. Classroom displays
8. Conference room displays
9. Lecture hall displays
10. Restaurant TVs
11. Bar displays
12. Retail displays
13. Trade show displays 
     
    For 4K use, the display must support 4K@30Hz input.

Frequently Asked Questions

Q: What is the OREI HD-104 used for? 
A: It is used to split one HDMI source to up to four HDMI displays.

Q: Is the HD-104 a splitter or extender? 
A: It is an HDMI splitter. It does not extend HDMI over CAT cable by itself.

Q: How many HDMI inputs does it have? 
A: It has one HDMI input.

Q: How many HDMI outputs does it have? 
A: It has four HDMI outputs.

Q: Does it show the same content on all displays? 
A: Yes. All connected displays show the same HDMI source.

Q: Can it show different content on each display? 
A: No. It duplicates one HDMI input to all outputs.

Q: Can it extend my computer desktop across four screens? 
A: No. It mirrors the same PC screen to multiple displays.

Q: Does the HD-104 support 4K? 
A: Yes. It supports up to 4K@30Hz 4:4:4.

Q: Does it support 4K@60Hz? 
A: No. It supports up to 4K@30Hz.

Q: Does it support 8K? 
A: No. It supports up to 4K@30Hz.

Q: What HDMI version does it support? 
A: It supports HDMI 1.4.

Q: What HDCP version does it support? 
A: It supports HDCP 1.4.

Q: What video bandwidth does it support? 
A: It supports 10.2Gbps video bandwidth.

Q: Does it support HDR? 
A: Yes. HDR is listed as supported.

Q: Does it support Dolby Vision? 
A: Yes. Dolby Vision is listed as supported.

Q: Does it support 3D? 
A: Yes. All HDMI 3D formats are listed as supported.

Q: Does it support EDID management? 
A: Yes. It includes STD and TV EDID modes.

Q: What is STD EDID mode? 
A: STD mode sets all HDMI outputs to default 1080p@60Hz with 2CH audio.

Q: What is TV EDID mode? 
A: TV mode copies the HDMI OUT 1 EDID setting to all outputs.

Q: Which output is used for EDID copy? 
A: HDMI OUT 1 is used in TV EDID mode.

Q: What happens if HDMI OUT 1 EDID is not detected? 
A: The device outputs default 1080p@60Hz with 2CH audio.

Q: Does the HD-104 support downscaling? 
A: No. The manual states that the HD-104 does not downscale 4K to 1080p.

Q: What should I do if my 1080p monitor does not display a 4K source? 
A: Set the media source video resolution to 1080p.

Q: Can I mix 4K and 1080p displays? 
A: Yes, but the source should be set to a resolution supported by all connected displays, such as 1080p.

Q: What audio formats are supported? 
A: It supports PCM 2.0 / 5.1 / 7.1CH, Dolby Digital, Dolby Digital Plus, Dolby TrueHD, DTS, DTS-HD Master Audio, and DSD.

Q: Does it support Dolby Atmos? 
A: Dolby Atmos is not listed in this manual.

Q: Does it support DTS:X? 
A: DTS:X is not listed in this manual.

Q: Does it extract audio to speakers? 
A: No. Dedicated audio extraction is not listed for this model.

Q: Does it have optical audio output? 
A: No. Optical audio output is not listed.

Q: Does it have analog audio output? 
A: No. Analog audio output is not listed.

Q: Does it support ARC or eARC? 
A: ARC and eARC are not listed.

Q: Does it support IR control? 
A: IR control is not listed.

Q: Does it support RS-232? 
A: RS-232 control is not listed.

Q: Does it have a firmware update port? 
A: Yes. It has a Mini USB-B SERVICE port for firmware updates.

Q: What power adapter does it use? 
A: It uses a DC 5V/1A power adapter.

Q: What is the maximum power consumption? 
A: Maximum power consumption is 2.8W.

Q: What do the LEDs mean? 
A: The red Power LED shows the unit is powered. The green IN LED shows the source is active. The green OUT LEDs show active displays are connected.

Q: What HDMI cable length is recommended? 
A: The manual lists 32ft / 10m for 4K@30Hz YCbCr 4:2:0 and 50ft / 15m for 1080p@60Hz. The FAQ recommends HDMI cables under 30ft.

Q: What should I do if there is no video output? 
A: Try a lower resolution from the media source, try changing the HDMI cables, and try changing the EDID setting.

Q: What should I do if one display has no video? 
A: Check that display’s HDMI cable, selected input, power, and OUT LED. Also test the display on another HDMI output.

Q: What should I do if 4K does not work? 
A: Confirm the source and displays support 4K@30Hz, use Premium High Speed HDMI cables, and try a lower source resolution.

Q: What should I do if audio does not work? 
A: Try STD EDID mode for 2CH audio, confirm the display supports the source audio format, and test with PCM stereo from the source.

Q: Does the HD-104 need external power? 
A: Yes. Connect the included DC 5V/1A power adapter.