8x8 4K HDBaseT/HDMI Matrix Switcher with Output Audio/ARC De-embedding and DSP on Analog L/R Balanced/Unbalanced, Digital Coaxial Audio (Includes 6RX (70M) & 2RX (100M) KIT Extenders)
  • Ultra HD/4K: Supports signals up to 4096x2160 60Hz [4:2:0] 8bit or 4096x2160 30Hz [4:4:4] 8bit (10.2Gbps max bandwidth)
  • Bandwidth: 10.2Gbps supports UHD/4K resolutions with HDR via EDID handshaking
  • HDR (High Dynamic Range): HDR is achieved with AppleTV source at 4K/30 [4:2:2] 12bit deep color, enabling more life-like images through a greater range of lumincance levels
  • HDCP 2.2 and HDMI Licensing: Fully licensed and compatible with HDCP 2.2 and HDMI latest technologies
  • Simultaneously Active: 8 HDBaseT (CAT5e/6 RJ45) and 8 HDMI outputs with fully automatic CAT5e/6 cable equalization. Supports up to 16 displays (8 mirrored)
  • HDBaseT Rx Included: 8 total Rx extenders integrate with built-in HDBaseT Tx output ports
  • » Six (6) Standard Range KD-X88SHRx
  • » Two (2) Long Range KD-X88LGRx
  • Signal Extension:  
  • KD-X88SHRx: Up to 200 feet @ 1080p/60, 1080p/24, 1080i, 720p » Up to 125 feet @ 4K/Ultra HD
  • KD-X88LGRx: Up to 328 feet @ 1080p/60 (Standard Range Mode) » Up to 328 feet @ 4K/Ultra HD 
  • Audio Return Channel: Audio may be returned from display to respective audio output 
  • Audio De-Embedding: Audio from the selected HDMI input may be de-embedded through the Coax digital (PCM) and analog L/R balanced/unbalanced output
  • Audio Pre-Amp: Variable level settings for volume, muting, 3-band EQ, balance, and lip-sync delay per output
  • Long Range Mode: Outputs 1 and 5 extend 1080p signals up to 500 ft. (152m) using CAT5e/6
  • Full Buffer™ Technology: Full buffering of HDCP and EDID, for the fastest possible switching and viewing of any source/input to any display/output, regardless of multiple output viewing relation
  • EDID Control: Internal library with 15 default EDID configurations for each input, in addition to native EDID data for any Output/Display
  • TMDS Re-clocking: Support for long HDBaseT and HDMI runs and many layers of connectivity
  • Voltage Control: Two dedicated 3-pin relays and any control I/O ports may be used as a voltage trigger 
  • Surround Audio Formats: Dolby® TrueHD, Dolby® Digital Plus, Dolby® Atmos and DTS-HD Master Audio™
  • Deep Color Support: Up to 12 bits/color
  • Control Routing: Enables bi-directional IR/RS-232 control signal extension adding 36 ports to control system
  • Control Integration: TCP/IP, RS-232, and USB with full bi-directional operation, front panel push buttons and LEDs, front/rear optical IR, serial IR
  • Control System Support: Key Digital® App ready, Compass Control® Pro ready, KD-Wizard® ready. Fully controllable by all IR, RS-232, and TCP/IP supported control systems via open API: AMX®, Crestron®, Control4®, KNX®, RTI®, Savant, URC®, Leviton® etc. 
  • Key Digital® App Ready: Scan & detect population for pre-built GUI and TCP/IP control via Key Digital® App

KD-X88LGRx and KD-X88SHRx POH/HDMI Receive Extenders

  • Extends HDMI video + audio, and control (IR and RS-232) via a single CAT5e/6 UTP or STP cable
  • Powered at the matrix.  No local power connections needed.


  • Up to 125 feet @ 4K/Ultra HD
  • Up to 200 feet @ 1080p/60, 1080p/24, 1080i, 720p


  • Up to 328 feet @ 4K/Ultra HD
  • Up to 328 feet @ 1080p/60 (Standard Range Mode)
  • Up to 500 feet @ 1080p/60 (Long Range Mode)
  • Long Range Mode:
    • If set to for Outputs 1 or 5, 1080p/60 signals are extended up to 500 ft. (152m). UHD/4K is not supported if Long Range Mode is enabled
    • Must be set in unit via IR or control software
    • Must be set on desired KD-X88LGRx unit via Control Rotary

Audio Return Channel (ARC)

ARC Support via HDBaseT (Outputs 1 and 5 only)

  • Supported by KD-X88LGRx only (not KD-X88SHRx)
  • KD-X88LGRx supports ARC on two connectors:  
    • HDMI connection from an ARC supported display
    • Toslink optical external audio output of the display

ARC Support via HDMI (All Outputs)

  • Ensure that display and HDMI cable support ARC

Example of ARC usage and supported connectivity:



  • Input (Each): 1 HDMI Connector, Type A, 19 Pin Female
  • Output (Each): 1 HDMI Connector, Type A, 19 Pin Female; 1 HDBaseT, CAT5e/6 on RJ45 connector; 6-Pin Terminal Block for Analog L/R Output; RCA Jack for Digital Audio Output [follows SPDIF format (IEC 60958 )]
  • Control I/O (Each): 6-Pin Terminal Block configured as IR or RS-232 with variable voltage levels from +0.1V to +12V or as or Voltage Trigger fixed to +5V
  • Relay (Each): Configurable to NO (active), or NC (inactive) with 12A / 250VAC resistive switching capacity
  • TCP/IP (1): Supports 10/100BaseT up to 100Mbps
  • Video Bandwidth: TMDS bandwidth 10.2 Gbps
  • Link: Single Link
  • DDC Signal (Data): Input DDC Signal - 5 Volts p-p (TTL)
  • HDMI Video/Audio Signal: Input Video Signal - 1.2 Volts p-p
  • DDC Communication: EDID and HDCP Bi-directional buffering to Display and Source
  • Wired IR: modulated IR signal input, 0-5V TTL or -10to +10V.
  • Power: Matrix: +12V/6.6A (80W) » HDBaseT: +12V/6.6A (80W)


  • Regulation: CE, RoHS, WEEE
  • Enclosure: Black metal
  • Rack Mount: 2U, full rack-width (rack ears included)
  • Accessories: Rack Ears
  • Product: 17.3” x 6.6” x 3.46” ; Weight: 6.5 lbs
  • Packaging: 18.8” x 10.7” x 9.5”; Weight: 16 lbs
  • Power Supply (qty 2) 12V/6.6A, 80W, desktop type, model SPU65-103
  • 6 standard range receiver extenders, model KD-X88SHRx
  • 2 long range receiver extenders, model KD-X88LGRx
  • IR Remote control, model KD-REMOTEHM88 
  • 6 ft. USB A to Micro USB data cable
  • 8 IR emitters
  • Rack mount ears

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