The 444K-4×4-L HDBaseT™ is an 4×4 matrix switcher that supports the transmission of 18Gbps HDMI video (up to 4K/2K@60Hz 4:4:4, 18Gbps, HDCP 2.2) and multi-channel digital audio from 4 HDMI 2.0 sources to 4 HDBaseT™ outputs, all with mirrored HDMI outputs.

Key Features

  • 18Gbps HDMI
  • Up to 70m cable distance
  • HDBaseT technology
  • HDMI 2.0 4K@60Hz
  • 4:4:4, 18G, HDR10, Dolby Vision
  • HDCP 2.2/1.3 compliant
  • Dual mirrored outputs
  • RS232 & IR control
  • POC (remote powering recievers)
  • Audio embed and de-embed


Similar Models

The Smart Digital Solutions 444K-4×4-L is a professional 18Gbps flexible HDBaseT matrix capable of selecting between 4 different HDMI devices to 4 local HDMI displays and simultaneously 4 HDBaseT receivers/displays located up to 70m from the unit. Flexible control options include front panel, infra-red, RS232 and an internal web browser configuration.

The Smart-e 444K-4×4-L offers an unprecedented level of both fast switching and long distant distribution functionality for Ultra High Definition (UHD) resolution HDMI, DVI or DisplayPort signals. IR pass-through features include a reverse wide-band path using ‘plasma-friendly’ eyes connecting to the HDBT receiver units for control of source devices. Whilst wide-band IR signal transmission is also available through the matrix and up the same Cat cable to control the display devices.

Each output also provides an individual de-embedded audio connection for both analogue stereo and digital S/P DIF. This enables combined audio zoning within an installation using external power amplifiers and speaker cabling. Audio embedding into each HDMI input feature is provided via individual analogue stereo mini-jack connections.

The inclusion of Smart-e’s new command protocol allows full control of the matrix, including EDID settings and muting inputs or outputs via RS232. Compact 1U 19” rack mounting chassis makes for ease of installation


  • 18Gbps HDMI signal compatible
  • Up to 70m cable distance
  • HDBaseT technology
  • HDMI 2.0 4K@60Hz
  • 4:4:4, 18G, HDR10, Dolby Vision
  • HDCP 2.2/1.3 compliant
  • Dual mirrored outputs
  • IR routing
  • POC (remote powering receivers)
  • CEC compliant
  • 4x Analog input embeding Audio
  • 4x Analog De-embedded Audio
  • 4x SPDIF De-embedded Audio
  • Front panel control
  • EDID management
  • 19″ rack mounting
  • RS232 & IR control
  • Ethernet control (Web browser)



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Description Type Size
Datasheet PDF File 529 KB
User Manual PDF File 2000 KB
4×4 HDMI-HDBT Matrix Range PDF File 454 KB



Connector Interface RJ45
Protocol HDBaseT Lite
EDID Support Pass-through
HDCP Support Pass-through
Resolution (Max) 4K 4096×2160 @ 60Hz
1920×1200 @ 60Hz
Audio Digital Embedded
Max Input Cable Length Up to 70m
Power 24V POC
Dimensions 70 x 65 x 25 (mm)