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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

  • Port count2
  • Adapter typeHDMI
  • Industry standardsHDMI 2.0b
  • Input ports1 x HDMI (19 pin) Female Input
  • Output ports2 x HDMI (19 pin) Female Output 1 x Toslink (SPDIF, Optical)
  • Maximum supported resolutions3840 × 2160
  • 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.

How it compares

Measured against everything we stock in HDMI & Video Splitters, at today’s prices. Recalculated every night.

Price $70.99
Pricier than about 90% of the 1,127 comparable items (median $20.99).

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Specifications

Product
Brand nameStarTech.com
Model nameST122HD20S
Product typeHDMI Splitters
Adapter typeHDMI
Product colorBlack
Display
Maximum supported resolutions3840 × 2160
Audio & video
SoundYes
Ports & slots
Port count2
Input ports1 x HDMI (19 pin) Female Input
Output ports2 x HDMI (19 pin) Female Output
1 x Toslink (SPDIF, Optical) Female Output
1 × 3.5 mm Mini-Jack (3 Position) Female Output
Size & build
Shipping weight0.91 kg
Package size254 × 203 × 152 mm
In the box
In the box1 x HDMI video splitter
1 x Universal Power Adapter (NA, EU, UK, ANZ)
1 x Instruction Manual
More details
Industry standardsHDMI 2.0b

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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