2x1 4K 18G HDMI Switcher with Auto-Switching, Analog & Digital Audio De-Embed

Key Digital® KD-S4x1X-2 is a 4K/18G HDMI switcher engineered to offer the best in quality, performance, and reliability, while providing a cost-effective HDMI switching solution. Designed for professional audio video installations in presentation, theater, and gaming spaces, KD-S4x1X-2 enables multiple video sources to connect to a single video display while L/R analog and Optical audio de-embed ports may be used to feed audio of the selected source into amplifiers, DSPs, or sound bars. Enable auto-switching to automatically select newly connected/powered sources or sequentially advance from the currently selected source when it is disconnected/powered off. KD-S4x1X-2 HDMI switcher supports all SD, HD, VESA and Ultra HD/4K video standards with HDR header information included in a variety of 4K EDID handshakes. The switchers feature push button and optical IR switching, status monitoring LEDs, and support of HDR10, HDCP 2.2 and 4K.


  • HDMI Switching: 4 HDMI sources to 1 HDMI output/display

  • Ultra HD/4K Support: 4096x2160 or 3840x2160 24/25/30/60hz at 4:4:4 (signals up to 18Gbps)

  • HDCP Licensing: Fully licensed and compatible with HDCP 2.2

  • HDR10 (High Dynamic Range): More life-like images through a greater range of luminance levels

  • Resolution Support: Supports all SD, HD, and VESA (VGA, SVGA, XGA, WXGA, SXGA, UXGA) up to 4096x2160p.

  • Deep Color Support: Up to UHD/4K 30Hz 4:4:4/12 bits or 60Hz 4:4:4/8 bit

  • Audio De-embedding: Audio of the selected HDMI input is output at the digital Optical and analog 3.5mm stereo connectors

  • Auto-Switching: Automatic selection of newly detected source and switching from newly disconnected source via hot plug detection voltage when enabled

  • Full Buffer System™: Manages TMDS re-clocking / signal re-generation, HDCP authentication to source & display, and EDID Control handshake

  • EDID Management: Internal library with 15 internal EDID handshakes including 4K with HDR in addition to native EDID data copied from the output/display

  • Lossless Compressed Digital Audio: Dolby® TrueHD, Dolby® Digital Plus, DTS-HD Master Audio™, and Dolby® Atmos

  • CEC Pass-thru: From connected display to selected HDMI source

  • Control: Front panel button, optical IR, RS-232 via Micro USB Port and included adapter cable

  • Control System Support: Compass Control® Pro ready. Fully controllable by all IR, and RS-232 supported control systems via open API.


  • Input (Each): HDMI Connector, Type A, 19 Pin Female
  • Output: HDMI Connector, Type A, 19 Pin Female 
  • Bandwidth: TMDS bandwidth 18 Gbps
  • DDC Signal (Data): Input DDC Signal - 5 Volts p-p (TTL)  
  • HDMI Video/Audio Signal: Input Video Signal - 1.2 Volts p-p
  •  Power Supply: SKO1T-0500100Z, 5V/1A, 100-240VAC, 50-60Hz, Interchangeable head, screw-in connector 


  • Regulation: CE, RoHS, WEEE
  • Enclosure: Black Metal
  • Product Dimensions: 5.8 x 3.5 x0.8" (147 x 90 x 20mm)
  • Packaging Dimensions: 8.3 x 5.6 x 3.1" (210 x 144 x 80mm)
  • Product Weight: 0.8 lb
  • Shipping Weight: 1.2 lb
  • Power Supply (qty 1) 5V/1A, 5W, wall type, model SKO1T-0500100Z
  • IR Remote Control: KDRMSWPROK
  • Mounting Brackets: 2 L-shaped
  • Control Cable: 6ft RS-232 3.5mm TRS to Micro USB, KD-S2x1XUSB2RS
Guarantee Logo
Where to Buy

Need to find a Key Digital distributor or a system integrator?

Call Sales at +1 914-667-9700 or

Email Sales Team

Need Help with System Design?

FREE Expert System Design Services for Key Digital Dealers & Resellers.

Let us help: +1 914-667-9700 or

Get Help with System Design