HDMI 2.1 · 48Gbps
HDMI 2.1 and HDCP 2.3 support with video formats up to 8K@60Hz 4:2:0 12-bit and 4K@120Hz 4:4:4 12-bit.
8K HDMI 2.1 · PROFESSIONAL 4×4 MATRIX
CH44008K_W
8K / 4K120 HDMI 2.1 4×4 Matrix Switcher
Route four HDMI 2.1 sources independently to four displays, with per-output scaling, HDR-to-SDR conversion, ARC, EDID management, four-channel audio extraction and centralized Web GUI / RS-232 control.
48Gbps · HDCP 2.3 · 8K@60Hz 4:2:0 12-bit · 4K@120Hz 4:4:4 12-bit · VRR / ALLM / QMS / QFT / SBTM · Web GUI / TCP/IP / RS-232
Key Features
Professional 8K HDMI Matrix & System Integration Functions
CH44008K_W combines 48Gbps HDMI 2.1 video routing, per-output signal processing, multi-channel audio extraction and network control in a 1U rack-mount platform.
True 4×4 Matrix Routing
Four HDMI inputs can be independently routed to four HDMI outputs, or multiple outputs can share the same source.
Per-Output Scaling
Each output independently supports pass-through, 8K→4K, 8K/4K→1080p, automatic sink-based scaling or audio-only mode.
Per-Output HDR → SDR
Each HDMI output can independently use HDR pass-through, HDR-to-SDR conversion or automatic sink-based behavior.
4-Channel Audio Extraction
Four Optical S/PDIF and four 5-pin balanced / unbalanced L/R audio outputs support independent external audio integration.
43 EDID Modes
36 built-in profiles, 3 user-defined EDIDs and 4 Copy OUT profiles can be managed from the front panel, Web GUI or RS-232.
Web GUI / TCP-IP
Browser control covers matrix routing, presets, EDID, scaling, HDR, HDCP, ARC, CEC, audio, network and system settings.
ARC · CEC · HDMI 2.1 Features
ARC can be enabled per output, with CEC control plus VRR, ALLM, QMS, QFT and SBTM support for compatible equipment.
Why CH44008K_W
Built for Four Display Zones with Different Video & Audio Requirements
▸ Independent 4×4 Routing
Each output selects its own source, allowing four display zones to operate independently from the same four-source pool.
▸ Mixed-Resolution Displays
Per-output scaling lets 8K, 4K and 1080p displays coexist without forcing the same conversion setting on every output.
▸ HDR / SDR Coexistence
Independent HDR-to-SDR processing is useful when HDR-capable and SDR-only displays share one matrix system.
▸ Flexible Audio Routing
Audio can follow an input, follow an output, or use the audio matrix to select HDMI input or output ARC audio independently.
▸ Browser-Based Management
Web GUI centralizes routing, presets, EDID, output processing, audio, CEC and network settings without a dedicated application.
▸ Professional Control Integration
Front panel, IR, Web GUI, TCP/IP and RS-232 provide multiple control paths for meeting rooms, control centers and integrated AV systems.
Functions
Detailed Function Description
- 4×4 HDMI matrix routing: route any of four HDMI inputs to any of four HDMI outputs, including multiple outputs using the same source.
- 48Gbps HDMI 2.1 video: supports up to 8K@60Hz 4:2:0 12-bit and 4K@120Hz 4:4:4 12-bit with HDCP 2.3.
- Independent video processing: OUT 1–4 can separately use pass-through, 8K→4K, 8K/4K→1080p, Auto or Audio Only modes.
- Independent HDR processing: each output supports HDR pass-through, HDR→SDR conversion or automatic behavior based on sink EDID.
- HDMI 2.1 features: supports VRR, ALLM, QMS, QFT and SBTM, subject to the complete source / display chain.
- Four-channel audio extraction: each output has Optical S/PDIF and 5-pin L/R analog audio; analog output supports balanced and unbalanced wiring.
- 43 EDID profiles: 36 built-in modes, 3 user-defined memories and 4 output-copy profiles simplify multi-display compatibility.
- ARC & audio matrix: output ARC audio can be selected as a source for extracted-audio routing, while audio may be bound to input, bound to output or freely routed.
- Centralized control: front-panel LCD/buttons, IR, Web GUI, TCP/IP, RS-232 and CEC support professional system operation.
Per-Output Processing
Independent Scaling and HDR Processing on Every HDMI Output
Unlike matrices with only a global downscale setting, CH44008K_W lets OUT 1 through OUT 4 use different video and HDR modes so multiple display capabilities can coexist in one installation.
Pass-Through (Default)
Output resolution follows the source format when the connected display supports the original signal.
8K → 4K
Downscale an 8K source to 4K for 4K display endpoints.
8K / 4K → 1080p
Convert high-resolution sources to 1080p for existing Full HD displays.
Auto · Follow Sink EDID
The output resolution follows the corresponding display's EDID to reduce manual compatibility adjustments.
Audio Only
Disable video while retaining audio output for installations that require a dedicated audio path.
HDR · Pass / HDR→SDR / Auto
Each output independently passes HDR, converts HDR to SDR, or automatically follows the sink capability.
Additional per-output settings: HDCP 1.4 / 2.2, Follow Sink, Follow Source and User modes, plus ARC enable/disable, audio mute and display enable/disable.
Web GUI / Network Control
Browser-Based Matrix, EDID, Output, Audio, CEC and Network Management
Connect the matrix and control computer to the same network, then open the matrix IP address in a browser. The Web GUI provides system status, matrix routing, input settings, output settings, audio settings, CEC, network and system management.
Matrix Routing & 4 Presets
Assign INPUT 1–4 to OUT 1–4 independently, apply one source to all outputs, and save, recall or clear up to four routing presets.
Input / EDID Management
View input connection status, rename channels, choose EDID profiles, upload three user EDID files and download current EDID data.
Output & Video Processing
Set resolution mode, HDR conversion, HDCP, ARC, audio mute and video output state independently for each output.
Audio Matrix
Bind extracted audio to HDMI input, bind it to HDMI output, or freely select INPUT 1–4 / OUTPUT 1–4 ARC as the audio source.
CEC Control
Control compatible input devices for power, navigation, play/pause and transport functions, and control compatible output devices for power and volume.
Network & System Maintenance
Configure Static IP / DHCP, network parameters, panel lock, buzzer, LCD on-time, serial baud rate, firmware upgrade, reboot and factory reset.
EDID / Audio Matrix
43 EDID Modes and Four-Channel Audio Routing
EDID · 36 Built-In + 3 User + 4 Copy OUT
Profiles cover 1080p, 4K30, 4K60 4:2:0 / 4:4:4, HDR, 4K120 and FRL 8K combinations with 2.0 / 5.1 / 7.1-channel audio options.
- Modes 1–36: predefined video / HDR / audio combinations.
- Modes 37–39: User 1–3 custom EDID memories.
- Modes 40–43: Copy EDID from OUT 1–4.
- Selectable from the front panel, Web GUI or RS-232.
Audio · Independent Optical and L/R per HDMI Output
CH44008K_W provides 4 × Optical S/PDIF and 4 × 5-pin 3.81 mm L/R audio outputs. Analog audio supports balanced or unbalanced connection up to 2 Vrms.
- Optical: LPCM 2.0CH / Dolby / DTS 5.1CH.
- Analog: LPCM 2CH.
- Audio can be bound to input, bound to output, or freely routed in Audio Matrix mode.
- ARC audio from outputs can be selected as an extracted-audio source.
Applications
Ideal Applications for CH44008K_W
Designed for professional AV systems that need multiple sources, multiple displays, mixed resolutions, independent audio handling and centralized network control.
Meeting & Presentation Spaces
Route four presentation or media sources independently to four displays and use presets for repeatable operating scenes.
4K120 Gaming & High Refresh
Support compatible 4K120 sources and displays with VRR, ALLM, QMS, QFT and SBTM.
Home Theater / Media Rooms
Integrate multiple players, consoles and displays while using ARC and external audio outputs for AVR or speaker systems.
Control Rooms & Monitoring
Web GUI, RS-232, TCP/IP and presets support centralized operation of multiple displays and source devices.
Mixed-Resolution Display Systems
Independent scaling and HDR conversion allow 8K, 4K and 1080p displays to coexist in one routing system.
R&D / AV Compatibility Testing
43 EDID modes, selectable HDCP behavior and independent output processing simplify source, display and audio compatibility tests.
System Design
CH44008K_W Signal Flow
4×4 HDMI Matrix + Independent Audio Extraction
System Profile
- Inputs: 4 × HDMI 2.1 source connections.
- Outputs: 4 × HDMI display outputs with independent source routing and processing.
- Audio: 4 × Optical S/PDIF + 4 × 5-pin L/R analog outputs.
- Signal Management: per-output scaling, HDR conversion, HDCP, ARC and mute/display control.
- Control: front panel, IR, Web GUI, TCP/IP, RS-232 and CEC.
Positioning: a professional 1U 8K HDMI 2.1 4×4 matrix for meeting spaces, control rooms, display systems, home theater and AV compatibility labs.
Technical Data
CH44008K_W Technical Specifications
Actual performance depends on the source, display, EDID, HDCP, cable quality and cable length. Validate the complete signal chain before project deployment.
| Specification | CH44008K_W |
|---|---|
| Product Type | 8K HDMI 2.1 4-input / 4-output matrix switcher |
| HDMI / HDCP | HDMI 2.1 / HDCP 2.3 |
| Video Bandwidth | 48Gbps |
| Maximum Video Formats | 4K2K@120Hz 4:4:4 12-bit; 8K4K@60Hz 4:2:0 12-bit |
| Color Depth / Space | 8 / 10 / 12-bit; RGB 4:4:4; YCbCr 4:4:4 / 4:2:2 / 4:2:0 |
| HDR | HDR, HDR10, HDR10+, Dolby Vision, HLG |
| HDMI 2.1 Features | VRR, ALLM, QMS, QFT, SBTM |
| Output Resolution Modes | Pass-through, 8K→4K, 8K/4K→1080p, Auto / Follow Sink EDID, Audio Only; independently configurable on OUT 1–4 |
| HDR Conversion | Pass-through, HDR→SDR, Auto / Follow Sink; independently configurable on OUT 1–4 |
| HDMI Audio Formats | LPCM, Dolby Digital / Plus / EX, Dolby TrueHD, Dolby Atmos, DTS, DTS-EX, DTS-96/24, DTS High Resolution, DTS-HD Master Audio, DSD |
| Optical Audio | 4 × OPTICAL AUDIO OUT; LPCM 2.0CH / Dolby / DTS 5.1CH |
| Analog Audio | 4 × L/R AUDIO, 5-pin 3.81 mm terminal block; balanced / unbalanced, max. 2 Vrms; LPCM 2CH |
| HDMI Inputs / Outputs | 4 × HDMI INPUT; 4 × HDMI OUTPUT, Type A 19-pin |
| Control Interfaces | 1 × TCP/IP RJ45; 1 × RS-232 D-Sub 9; 1 × IR EXT 3.5 mm |
| Operation | Front-panel LCD / buttons, IR remote, Web GUI, RS-232 commands |
| EDID | 36 built-in + 3 user-defined + 4 Copy OUT profiles; 43 modes total |
| ARC | ARC enable / disable on OUT 1–4; output ARC audio can be selected in the audio matrix |
| CEC | CEC management for compatible HDMI input and output devices |
| RS-232 | Default: 115200 baud, 8 data bits, 1 stop bit, no parity |
| Network | Static IP or DHCP; TCP/IP control port 8000; Telnet port 23 |
| Enclosure / Dimensions | Black metal enclosure; 440 × 203 × 44.5 mm (L × W × H) |
| Weight | Approx. 2.65 kg |
| Power | Adapter input AC 100–240V 50/60Hz; output DC 24V / 2.7A, locking connector |
| Maximum Power Consumption | 35 W |
| Operating / Storage Temperature | 0°C to 40°C / -20°C to 60°C |
| Operating / Storage Humidity | 20%–80% RH / 10%–90% RH, non-condensing |
| ESD Protection | IEC 61000-4-2: ±8 kV air discharge / ±4 kV contact discharge |
Cable Guide
Recommended HDMI Cable Length by Resolution
8K and 4K120 signals are sensitive to cable quality, connectors and the complete signal path. Use high-quality cables and validate the final installation.
| Resolution | Recommended Cable Class | Recommended Input / Output Length |
|---|---|---|
| 8K | Ultra High Speed HDMI / HDMI 2.1 | Approx. 3 m |
| 4K@60Hz | High-quality high-speed HDMI cable | Approx. 5 m |
| 4K@30Hz | High-quality high-speed HDMI cable | Approx. 10 m |
| 1080p | High-quality high-speed HDMI cable | Approx. 15 m |
Interface & Control
- 4 × HDMI inputs and 4 × independently routed HDMI outputs.
- 4 × Optical S/PDIF and 4 × 5-pin L/R audio outputs.
- TCP/IP RJ45, RS-232 D-Sub 9 and IR EXT 3.5 mm control interfaces.
- Front-panel LCD and buttons provide routing, EDID and system setup access.
- Web GUI and RS-232 provide centralized configuration and system integration.
Package Contents
- CH44008K_W Main Unit × 1
- DC 24V / 2.7A Locking Power Adapter × 1
- AC Power Cord, approx. 1.5 m × 1
- IR Remote Controller × 1
- IR Wideband Receiver Cable, 12V / approx. 1.5 m × 1
- RS-232 Serial Cable, approx. 1.5 m, male-to-female × 1
- 5-pin 3.81 mm Terminal Blocks × 4
- Rack Ears × 2
- Mechanical Screws × 8
- User Manual × 1
FAQ
CH44008K_W Frequently Asked Questions
Can CH44008K_W show different HDMI sources on four displays?
Yes. Each of the four HDMI outputs can independently select any of the four HDMI inputs. Multiple outputs may also use the same source.
Does CH44008K_W support 8K60 and 4K120?
Yes. The specified maximum formats include 8K4K@60Hz 4:2:0 12-bit and 4K2K@120Hz 4:4:4 12-bit with 48Gbps video bandwidth. Actual operation depends on the source, display, EDID and cable chain.
Can all four outputs downscale independently?
Yes. OUT 1–4 can independently use Pass-Through, 8K→4K, 8K/4K→1080p, Auto / Follow Sink EDID or Audio Only mode.
Can CH44008K_W convert HDR to SDR?
Yes. Each output independently supports HDR pass-through, HDR-to-SDR conversion or automatic output behavior based on the connected display.
Does CH44008K_W support ARC?
Yes. ARC can be enabled or disabled on OUT 1–4, and output ARC audio can be selected as a source in Audio Matrix mode.
Can extracted audio be routed independently from HDMI video?
Yes. Audio settings include Bind to Input, Bind to Output and Audio Matrix modes. Audio Matrix can select HDMI INPUT 1–4 or OUTPUT 1–4 ARC audio as the extracted source.
What can be configured in the Web GUI?
Matrix routing and presets, EDID, output resolution and HDR, HDCP, ARC, mute, audio matrix, CEC, network parameters, panel lock, LCD behavior, firmware upgrade, reboot and factory reset.
How many EDID modes are available?
There are 43 modes: 36 built-in EDIDs, 3 User Define profiles and 4 Copy OUT 1–4 profiles, selectable through the front panel, Web GUI or RS-232.
Installation Notes
Deployment, Network and Compatibility Notes
- For 8K / 4K120 transmission, use high-quality Ultra High Speed HDMI cables and validate cable length with the actual source and display devices.
- When displays have different resolution or HDR capabilities, configure each output's Video Mode and HDR behavior independently and select an appropriate EDID.
- If the front-panel IR window is obstructed in a rack, use the IR EXT receiver cable.
- For TCP/IP and Web GUI operation, place the control computer and matrix on the same network. The current IP address can be checked from front-panel IP INFO or by RS-232 command.
- After power cycling, the RS-232 and Web modules may require several minutes to complete initialization.
- Use the specified DC 24V / 2.7A locking power supply and follow professional rack grounding requirements.