8K / 4K120 HDMI 2.1 4×2 Matrix Switcher
Route four high-bandwidth HDMI sources independently to two displays, with eARC/ARC return audio, EDID management, output downscaling and optical / analog audio extraction.
40Gbps · HDCP 2.3 · 8K@60Hz 4:2:0 · 8K@30Hz 4:4:4 · 4K@120Hz · VRR / FVA / ALLM · HDR10+ · Dolby Vision
CH42008K_W is a professional 8K HDMI 2.1 4-input / 2-output matrix switcher designed for systems that need independent routing of game consoles, PCs, media players and set-top boxes to two TVs, monitors or projectors.
It combines high-bandwidth video switching with eARC/ARC, EDID management, OUT 2 resolution downscaling and HDMI audio extraction, making it useful for home theater, meeting rooms, demo spaces and mixed-resolution AV installations.
Choose CH42008K_W when the project requires 8K60 / 4K120 source compatibility, two independently selectable displays, eARC return audio, or a second output that may need 8K→4K / 1080p downscaling.
CH42008K_W combines next-generation HDMI 2.1 video, flexible 4×2 routing and practical signal-management tools in one compact matrix platform.
Supports up to 8K@60Hz 4:2:0 10-bit, 8K@30Hz 4:4:4 10-bit and 4K@120Hz 4:4:4 10-bit.
HDMI 2.1 and HDCP 2.3 support with up to 40Gbps video bandwidth for high-resolution and high-refresh-rate sources.
Four HDMI inputs can be routed independently to OUT 1 and OUT 2, with a selectable splitter mode for synchronized distribution.
INPUT 1 and OUT 1 support the product's eARC / ARC return-audio configuration for compatible TVs and soundbars.
Supports HDR, HDR10, HDR10+, Dolby Vision and HLG pass-through, plus VRR, FVA and ALLM.
Optical S/PDIF and 3.5 mm L/R outputs provide independent audio extraction for amplifiers, speakers and AV systems.
3-bit EDID control supports OUT 1 EDID copy and fixed 1080p, 4K60 and 8K video / audio capability combinations.
Downscale 8K to 4K or 8K / 4K to 1080p on OUT 2 for mixed-resolution display environments.
OUT 1 and OUT 2 can select different HDMI inputs, allowing two displays to operate independently from the same four-source pool.
Use the integrated eARC / ARC path for compatible display and soundbar installations without adding another return-audio box.
OUT 2 downscaling helps an 8K or 4K source coexist with a 4K or 1080p display in the same system.
Selectable EDID presets simplify resolution and audio capability matching when different displays or audio systems are connected.
Optical and analog audio outputs make it easier to feed external amplifiers, powered speakers or meeting-room audio systems.
4K120, VRR and ALLM support make the matrix suitable for modern game consoles and high-refresh display systems.
The 3-bit CONFIG switch controls matrix / splitter operation and OUT 2 downscaling. A separate 3-bit EDID switch provides eight EDID profiles.
OUT 1 and OUT 2 independently select any of the four HDMI inputs.
Operate as an HDMI distribution device when synchronized output behavior is required.
OUT 2 downscales an 8K source to 4K for a 4K display.
OUT 2 downscales high-resolution sources to 1080p. x11 and x00 operate as pass-through modes.
| EDID | Profile |
|---|---|
| 111 | Copy EDID from the display connected to OUT 1 (default) |
| 110 | 1080p@60Hz · 2ch PCM |
| 101 | 4K@60Hz 4:4:4 · 2ch PCM |
| 100 | 4K@60Hz 4:4:4 · 5.1ch PCM / DTS / Dolby |
| 011 | 4K@60Hz 4:4:4 · 7.1ch PCM / DTS / Dolby / HD audio |
| 010 | 8K@60Hz 4:2:0 + 8K@30Hz 4:4:4 · 2ch PCM |
| 001 | 8K@60Hz 4:2:0 + 8K@30Hz 4:4:4 · 5.1ch PCM / DTS / Dolby |
| 000 | 8K@60Hz 4:2:0 + 8K@30Hz 4:4:4 · 7.1ch PCM / DTS / Dolby / HD audio |
CH42008K_W supports both normal 4×2 HDMI matrix operation and the product's eARC / ARC return-audio configuration.
With eARC disabled, OUT 1 and OUT 2 operate as standard HDMI display outputs. Four HDMI sources can be routed independently to the two displays.
When eARC is enabled, connect OUT 1 (eARC) to an eARC / ARC-compatible TV and use INPUT 1 (eARC) for the compatible soundbar connection specified by the product design.
Designed for systems that need four high-bandwidth HDMI sources, two independently controlled displays, eARC audio or mixed display resolutions.
Integrate modern game consoles and high-refresh-rate displays with VRR and ALLM support.
Route 8K sources while combining HDR, Dolby Vision and eARC / ARC return audio for TV and soundbar systems.
Switch four source devices independently between two TVs, monitors or projectors.
Use OUT 2 downscaling when one display is 8K / 4K and the second display is limited to 4K or 1080p.
Extract HDMI audio through optical S/PDIF or 3.5 mm L/R for amplifiers, powered speakers or meeting-room audio.
Use fixed or copied EDID modes to test resolution, color and audio capability negotiation between devices.
Actual performance depends on the complete source, display, EDID and HDMI cable chain. For project deployment, test the intended source / display combination at the required resolution and refresh rate.
| Specification | CH42008K_W |
|---|---|
| Product Type | 8K HDMI 2.1 4-input / 2-output matrix switcher |
| HDMI / HDCP | HDMI 2.1 / HDCP 2.3 |
| Video Bandwidth | 40Gbps |
| Maximum Video Formats | 8K@60Hz 4:2:0 10-bit; 8K@30Hz 4:4:4 10-bit; 4K@120Hz 4:4:4 10-bit |
| Color Depth | 8 / 10 / 12-bit |
| Color Space | RGB 4:4:4; YCbCr 4:4:4 / 4:2:2 / 4:2:0 |
| HDR | HDR, HDR10, HDR10+, Dolby Vision, HLG pass-through |
| HDMI 2.1 Features | VRR, FVA, ALLM |
| eARC / ARC | INPUT 1 and OUT 1 support the product's eARC / ARC return-audio configuration |
| 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 |
| Audio Extraction | Optical: up to LPCM / Dolby / DTS 5.1 CH; 3.5 mm L/R: LPCM 2.0 CH |
| HDMI Inputs | 4 × HDMI IN, Type A 19-pin |
| HDMI Outputs | 2 × HDMI OUT, Type A 19-pin |
| Other Outputs | 1 × Optical S/PDIF; 1 × 3.5 mm L/R |
| Service Port | 1 × Micro USB SERVICE for firmware / service functions |
| EDID | 3-bit EDID DIP switch; 8 profiles |
| Downscaling | OUT 2: 8K→4K; 8K / 4K→1080p |
| Control | Front-panel buttons and IR remote controller |
| Enclosure | Black metal enclosure |
| Dimensions | 200 × 85 × 21 mm (L × W × H) |
| Weight | Approx. 411 g |
| Power | Adapter input: AC 100–240V, 50/60Hz; output: DC 5V / 2A |
| Maximum Power Consumption | 2.05 W |
| Operating Temperature | 0°C to 40°C |
| Storage Temperature | -20°C to 60°C |
| Relative Humidity | 20%–90% RH, non-condensing |
| ESD Protection | ±8 kV air discharge / ±4 kV contact discharge |
8K and 4K120 signals are especially sensitive to cable quality, connectors and the complete signal path. Use high-quality certified cables and verify the installation before deployment.
| Resolution | Recommended Cable Class | Recommended Length |
|---|---|---|
| 8K | Ultra High Speed HDMI / HDMI 2.1 | Approx. 3 m |
| 4K@60Hz | High Speed HDMI / HDMI 2.0 | Approx. 8 m |
| 4K@24Hz | HDMI 1.4 | Approx. 12 m |
| 1080p | HDMI 1.4 | Approx. 15 m |
Yes. In matrix mode, OUT 1 and OUT 2 can independently select any of the four HDMI inputs. Splitter mode can be used when synchronized distribution is required.
Yes. The listed maximum formats include 8K@60Hz 4:2:0 10-bit, 8K@30Hz 4:4:4 10-bit and 4K@120Hz 4:4:4 10-bit. Actual performance depends on the source, display, EDID and HDMI cable chain.
Yes. CONFIG settings provide 8K→4K and 8K / 4K→1080p downscaling on OUT 2, with pass-through options when conversion is not required.
In the product's eARC mode, OUT 1 connects to an eARC / ARC-compatible display and INPUT 1 is used for the compatible soundbar connection. OUT 2 remains a standard HDMI output without eARC.
Yes. CH42008K_W provides Optical S/PDIF and 3.5 mm L/R analog audio outputs. Optical supports up to LPCM / Dolby / DTS 5.1 CH, while the analog output is LPCM 2.0 CH.
Yes. The product specification lists HDR, HDR10, HDR10+, Dolby Vision and HLG pass-through, together with VRR, FVA and ALLM.
Yes. The 3-bit EDID DIP switch provides eight profiles, including OUT 1 EDID copy and fixed 1080p, 4K60 and 8K video / audio combinations.