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Small black HDMI splitter box with two output ports and audio connectors

STARTECH

STARTECH ST122HD20S 2-port HDMI video splitter 4K 60Hz 18Gbps 7.1 audio

SKU CH-0NN1-9KPTG MPN ST122HD20S

Splits one HDMI source to two displays at 4K 60Hz with 7.1 audio, 4:4:4 chroma and HDCP 2.2

  • TypeHDMI Splitters
  • Changer TypeHDMI
  • Ports2
  • AudioYes
  • Industry StandardsHDMI 2.0b
  • ColorBlack
  • Connect one HDMI source to two displays with 4K 60Hz HDR support
  • Enjoy 7.1 surround sound via HDMI optical or 3.5 mm audio outputs
  • Maintain 4:4:4 chroma at 4K 60Hz with 18 Gbps bandwidth
  • Works with HDCP 2.2 and scales down to 1080p or 720p displays
  • Includes universal power adapter for NA EU UK ANZ regions

2-port HDMI splitter with 4K 60Hz support

The STARTECH ST122HD20S distributes a single HDMI 2.0b source to two displays at resolutions up to 3840 x 2160 at 60 Hz. It handles HDR content and 7.1 surround sound for home cinema or digital signage installations. Built-in EDID emulation keeps the source active when one display is powered off. The unit includes a universal power adapter for worldwide use.

Capacity and headroom

Bandwidth reaches 18 Gbps, allowing full 4:4:4 chroma subsampling at 4K 60 Hz without colour compression. The splitter also passes 4K 30 Hz, 1080p and 720p signals for mixed-display setups. HDCP 2.2 compliance protects premium content, while the 16.4 ft cable-length limit defines the maximum run from splitter to each screen. Audio extracts to both Toslink optical and 3.5 mm analogue outputs simultaneously.

Connectors and daily use

One HDMI female input accepts the source; two HDMI female outputs feed the displays. Front-panel LEDs show power, input lock and each output status at a glance. The compact black enclosure sits on a desk or mounts in a rack without blocking adjacent ports. Optical and 3.5 mm audio ports let you route sound to a receiver or powered speakers independently of the displays.

Highlights

  • Connect one HDMI source to two displays with 4K 60Hz HDR support
  • Enjoy 7.1 surround sound via HDMI optical or 3.5 mm audio outputs
  • Maintain 4:4:4 chroma at 4K 60Hz with 18 Gbps bandwidth
  • Works with HDCP 2.2 and scales down to 1080p or 720p displays
  • Includes universal power adapter for NA EU UK ANZ regions

Specifications

BrandStarTech.com
ModelST122HD20S
TypeHDMI Splitters
Changer TypeHDMI
Ports2
AudioYes
Industry StandardsHDMI 2.0b
ColorBlack
SpecificationsAudio: Yes
AV Input: HDMI - 2.0
AV Output: HDMI - 2.0
Industry Standards: HDMI 2.0b
Ports: 2
Audio Specifications: 7.1 surround sound
Maximum Cable Length: 16.4 ft [5 m]
Maximum Data Transfer Rate: 18 Gbps
Maximum Digital Resolutions: 3840x2160 (4K) @ 60Hz
3840x2160 (4K) @ 30Hz
1920x1080 (1080p)
1280x720 (720p)
Video Revision: HDMI 2.0b
Wide Screen Supported: Yes
LED Indicators:
1 - Power LED
1 - Input LED
2 - Output LEDs
Input Connector1 x HDMI (19 pin) Female Input
Output Connector2 x HDMI (19 pin) Female Output
1 x Toslink (SPDIF, Optical) Female Output
1 x 3.5 mm Mini-Jack (3 Position) Female Output
Maximum Resolutions3840 x 2160
FeaturesAstonishing picture quality with support for 4K 60Hz and HDR
Support for 7.1 surround sound audio
Supports 4:4:4 chroma subsampling even at 4K 60Hz with bandwidth up to 18Gbps
Package Contents1 x HDMI video splitter
1 x Universal Power Adapter (NA, EU, UK, ANZ)
1 x Instruction Manual
Shipping weight0.91 kg
Package size254 × 203 × 152 mm

Questions about this item

Will this splitter pass 4K 60Hz HDR from my HDMI 2.0 source to two older 1080p displays without downscaling the source?

The built-in scaler lets the source stay at 3840x2160 60Hz while each output negotiates its own EDID, so one display can show 1080p and the other 720p without forcing the source to drop resolution.

How do I confirm the unit is actively passing a 4K 60Hz 4:4:4 signal after I connect everything?

Check the front LEDs — power, input and both output indicators should be solid; then verify on the source device that the reported resolution is 3840x2160 at 60Hz with 4:4:4 chroma and HDR enabled.

Does the box include HDMI cables for the two outputs, or do I need to buy them separately?

The package contains the splitter, a universal power adapter with NA, EU, UK and ANZ plugs, and an instruction manual — HDMI cables for the input and both outputs are not included and must be purchased separately.

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