• • • Discontinued • • •

Model Number: AT-PRO3HD66M

Replaced with AT-PRO2HD88M  or the AT-UHD-PRO3-66M

  • Delivers More
  • Low-Stress, High-Performance AV
  • 230-Feet, 70-Meter Distance
  • Easy, Complete Control
  • Power Over Category Cable
  • Discreet Wall Plate Options 

Atlona 6 x 6 HDMI to HDBaseT Matrix Switcher

Focused design: Atlona’s PRO3HD66M affordably routes and extends 1080p video and multi-channel audio to as many as six displays up to 230 feet (70 meters) away. HDBaseT, power over category cable (PoCc), and complete control.

View an Atlona system diagram to see PRO3HD66M at work in a sophisticated, media-driven boardroom or impressive connected home


Delivers More

More affordable routing and extension, more reliably. Extends six sources to six HDBaseT outputs and two mirrored HDMI outputs for impressive, immersive audio and video in multiple spaces simultaneously.

Low-Stress, High-Performance AV

Great AV with easy setup. Get 1080p, 3D, deep color, and surround sound where you want it, when you want it.

HDMI or S/PDIF digital audio outputs sends multi-channel audio to an AV receiver or zone amplifier. Get highest-quality sound, like Dolby TrueHD, Dolby Atmos, DTS-HD Master Audio, and DTS:X, without added cables or outlets.

230-Feet, 70-Meter Distance

Get HD video, multi-channel audio, control, and power up to 230 feet (70 meters) over a single category cable.

Easy, Complete Control

Easily control the matrix via TCP/IP, RS-232, and GUI. Works with most major control systems. Bidirectional IR allows control of display and source through the same interface.

  • Bi-directional IR
  • Bi-directional RS-232
  • TCP/IP with GUI

Compatible Control Systems: AMX, Control4, Crestron, Elan, Neets, On Controls, RTI, and URC.  For drivers, please see the Control Drivers tab.

Power Over Category Cable

PoCc extends power to receivers up to 230 feet (70 meters) over a single category cable. Use PRO3HD66M to power up to six receivers at once.

Purchase an optional redundant power supply (AT-PW24V6.25A) to guarantee reliability.

Discreet Wall Plate Options 

Atlona PRO3HD66M is designed to work with Atlona wall plate receivers for clean, elegant installation behind a TV display.

AT-HDWP-IR – Wall plate w/IR, PoCc, audio, and video
 AT-HDWP-IR-UK – UK wall plate w/IR, PoCc, audio, and video
 AT-HDWP – Wall plate w/PoCc, audio, and video
 AT-HDWP-UK – UK wall plate w/PoCc, audio, and video



AT PRO3HD66M Basic Features


Atlona Academy – EDID Management



  Video 480i@60Hz, 480p@59.94/60Hz, 576i@50Hz, 576p@50Hz, 720p@50/59.94/60Hz, 1080i@50/59.94/60Hz, 1080p@23.98/24/25/29.97/30/50/59.94/60Hz
  VESA 640×480@60Hz, 800×600@60/75Hz, 1024×768@60/75Hz, 1280×768@60/75Hz, 1280×800@60Hz, 1280×1024@60/75Hz, 1366×768@60Hz, 1400×1050@60Hz, 1440×900@60/75Hz, 1600×900@60Hz, 1600×1200@60Hz, 1680×1050@60Hz, 1920×1200@60Hz
  Colorspace RGB, YCbCr 4:4:4, YCbCr 4:2:2 (8-bit only)
  Color depth 8-bit, 10-bit, 12-bit


  Formats PCM 2Ch, LPCM 5.1, LPCM 7.1, Dolby Digital, DTS 5.1, Dolby Digital+, Dolby TrueHD, DTS-HD Master Audio, Dolby Atmos, DTS:X
  Sample Rate 32kHz, 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz


  HDMI IN up to 15 meters (@1080p 8-bit) up to 50 feet
  HDMI OUT up to 15 meters (@1080p 12-bit) up to 50 feet
  CAT5e/6 up to 60 meters up to 197 feet
  CAT6a/7 up to 70 meters up to 230 feet


  Bandwidth 6.75 Gbps
  CEC No
  HDCP Compliant

Fan Noise

  SPL 28dBA


  Operating 0°C to 40°C 32°F to 104°F
  Storage -20°C to 60°C -4°F to 140°F
  Humidity 20 to 90% non-condensing


  Consumption 90W
  Idle Consumption 6.1W
  Supply Input: AC100~240V 50/60Hz
Output: DC 24V/5A


  H x W x D 87.95 x 433.8 x 280 (mm) 3.46 x 17.08 x 11.02 (inch)
  W/feet 97.85 x 433.8 x 280 (mm) 3.85 x 17.08 x 11.02 (inch)
  Rack Unit 2


  Device 4.38kg 9.66lbs
  Shipping 8.24kg 18.16lbs


  Power Supply CE, FCC, RoHS, cULus



  Features 3D, 1080p, 1920×1200, Dolby TrueHD, DTS-HD Master Audio


  Features 3D, 1080p, 1920×1200, Dolby TrueHD, DTS-HD Master Audio


  HDBaseT PoCc, RS-232, IR, 3D, 1080p, 1920×1200, Dolby TrueHD, DTS-HD Master Audio


  Compatibility Mono to mono IR cables or Atlona IR receiver


  Compatibility Atlona IR emitter only


  Audio Formats PCM 2Ch, Dolby Digital, DTS 5.1


  Use Firmware updating

Package Contents

QTY   Item
1   AT-PRO3HD66M
1   24V DC power supply adaptor
1   Power cord
1   IR receiver module
7   IR emitter
1   Remote control
1   Pair of dual purpose wall/rack mount ears
1   User manual


pdf-icon Manual
pdf-icon DataSheet
pdf-icon SellSheet

Diagrams, Drawings & CAD Files

cad-icon-(1) CAD Files


pdf-icon FAQ

Declarations Of Conformity

pdf-icon Declarations Of Conformity

Related Products

AT-UHD-SYNC Atlona 4K HDMI Emulator/Tester
AT-HD-M2C Atlona HDMI Multichannel to 2CH Converter
AT-HDRX-IR Atlona HDBaseT Receiver over a Single Category Cable w/IR
AT-UHD-EX-70C-KIT 4K/UHD HDMI Over HDBaseT TX/RX with Control and PoE

Similar Products

AT-UHD-PRO3-66M 4K/UHD Dual-Distance 6×6 HDMI to HDBaseT Matrix Switcher with PoE
AT-UHD-PRO3-88M 4K/UHD Dual-Distance 8×8 HDMI to HDBaseT Matrix Switcher with PoE
AT-PRO3HD66M Atlona 6 x 6 HDMI to HDBaseT Matrix Switcher
AT-H2H-44M Atlona 4 by 4 HDMI Matrix Switcher

AT-PRO3HD66M Firmware

Download Firmware version 2.0.09
File Size 208 KB
Date 10.18.13

Update 2.0.09 Includes

  • Fixed double IP feedback issue
  • New WebGUI for setup and control
  • DHCP default on
  • SDDP support for Control4 integration

AMX RS-232 and TCP/IP Control
File Size 327 KB
Date 06.25.13

*SDDP Enabled* 

Control4 IR Control
File Size 3 KB
Date 06.11.13
Control4 RS-232 Control
File Size 63 KB
Date 06.11.13
Control4 TCP/IP Control
File Size 68 KB
Date 06.11.13

Crestron RS-232 and TCP/IP Matrix Control
File Size 3468 KB
Crestron RS-232 and TCP/IP Matrix & Zone Control
File Size 3856 KB
Date 06.25.13

Elan Available through Elan
Date 08.16.13

Neets IR, RS-232, and TCP/IP Control
File Size 50 KB
Date 06.11.13

On Controls On Controls Web based control
Date 06.11.13

RTI RS-232 and TCP/IP control
File Size 480 KB
Date 1.28.14

Universal Remote Control CCP Accelerator RS-232 Control
File Size 2 KB
Date 08.08.13

Vantage Driver Vantage
Date 07.16.14

Click below for Support details