Other products by Atlona
(Tech Support Website)

MSRP: $2,000.00

4K HDR Multi-Channel Audio Converter




  • HDMI® audio de-embedding and multi-channel audio downmixing for four HDMI sources
  • Downmixes multi-channel PCM, Dolby®, and DTS® formats to stereo audio
  • 4K/UHD capability @ 60 Hz with 4:4:4 chroma sampling, plus support for HDR formats
  • HDCP 2.2 compliant
  • Delivers downmixed audio to TOSLINK digital and analog audio outputs


The Atlona AT-HDR-M2C-QUAD is an audio converter for extracting and downmixing multi-channel PCM, Dolby, and DTS audio from HDMI. Part of the comprehensive family of Atlona 4K HDR integration products, the HDR-M2C-QUAD provides simultaneous audio conversion for four HDMI sources. Each HDMI input features pass-through on its associated HDMI output. It also includes unbalanced analog and TOSLINK digital audio outputs with a downmixed stereo signal. The HDR-M2C-QUAD is compatible with high dynamic range (HDR) formats and is HDCP 2.2 compliant. It supports 4K/UHD video @ 60 Hz with 4:4:4 chroma sampling, as well as HDMI data rates up to 18 Gbps. This quad HDMI audio conversion device includes EDID management features as well as audio volume and bass / treble controls for each converter, all available via Ethernet through the Atlona Management System (AMS), the web GUI, or a control system. The HDR-M2C-QUAD is ideal for serving surround sound and/or two-channel audio systems from up to four HDMI sources, while facilitating pass-through to a matrix switcher.


The HDR-M2C-QUAD is ideal for residential and commercial applications with the latest as well as emerging 4K/UHD and HDR sources and displays. It is compatible with all video resolutions, audio formats, and color space formats supported in the HDMI 2.0b specification, plus the ability to pass metadata for HDR content. The HDR-M2C-QUAD includes Atlona’s award-winning 10-year limited product warranty and customer support services, so that integrators can specify, purchase, and install with confidence.



  • Residential and commercial installations – The HDR-M2C-QUAD is designed for AV systems with the latest UHD and HDR sources such as Ultra HD Blu-ray players, plus compatible televisions and projectors.
  • Audio compatibility – The HDR-M2C-QUAD is ideal for applications requiring playback of multi-channel source content over displays and whole-house audio systems.


HDMI audio de-embedding and multi-channel audio downmixing for four HDMI sources

  • Quad HDMI audio conversion for four HDMI sources
  • De-embeds HDMI audio with or without connection to a display or other destination
  • Provides easy integration of HDMI audio sources into whole-house and other audio systems

Downmixes multi-channel PCM, Dolby, and DTS formats to stereo audio

  • Extracts, decodes, downmixes, and converts digital multi-channel bitstreams to two-channel signals
  • Supports PCM, Dolby® Digital, Dolby Digital Plus™, and DTS® Digital Surround™ (does not support lossless formats)

4K/UHD capability @ 60 Hz with 4:4:4 chroma sampling, plus support for HDR formats

  • Ideal for new and emerging 4K/UHD and HDR-capable sources and displays
  • Compatible with 4K HDR10 and Dolby Vision™ @ 60 Hz, as well as HLG (Hybrid Log-Gamma) for future 60p HDR broadcast services
  • Fully supports video resolutions, audio formats, and color space formats in the HDMI 2.0b specification

HDCP 2.2 compliant

  • Adheres to latest specification for High-bandwidth Digital Content Protection
  • Allows protected content stream to pass between devices

Delivers downmixed audio to TOSLINK digital and analog audio outputs

  • Provides flexible options for integrating with displays, matrix switchers, and multi-zone audio amplifiers
  • Also passes through the HDMI input with no downmixing

Volume and tone adjustments

  • Adjustment of output volume, plus bass and treble settings via AMS and the web GUI
  • Avoids the need for an external DSP to set gain and tone controls

EDID management

  • Manages EDID communications with the source through a display’s EDID or internally stored EDID
  • Ensures desired audio formats and video resolutions are provided to the AV system

IP control

  • Ready for integration with Atlona Velocity™ and third-party control systems
  • Flexible options for audio volume and bass / treble controls, as well as EDID management

Intuitive GUI-based configuration using integrated web server

  • Offers menu-based configuration of network settings, audio, and EDID management
  • Allows fast configuration of internal product settings and troubleshooting from a mobile device or PC in the field

Easy to configure and manage with AMS (Atlona Management System)

  • Centralized, network-based configuration and management of Atlona IP-controllable products and systems
  • Manage configuration and firmware updates for AV devices spanning a facility, building, enterprise, or residence
  • Available as a cost-effective server appliance, or a free software download

Field-updatable firmware

  • Device can be updated in the field via AMS or the web GUI
  • USB port also available for firmware updates

Rack mountable 1U, full-rack width enclosure

  • Installs easily in rack mounted systems with included 19” rack mount brackets
  • Reduces installation time and cost

Included accessories

  • User guide, rack mounting brackets, power cable (US), and captive screw connectors

Award-winning 10 year limited product warranty

  • Ensures long-term product reliability and performance in residential and commercial systems
  • Specify, purchase, and install with confidence


Connectors, Controls, and Indicators
HDMI IN 4 – Type A, 19-pin female
HDMI OUT 4 – Type A, 19-pin female
AUDIO OUT 4 – 3-pin, captive screw
LAN 1 – RJ45
FW 1 – Mini USB Type B
Power 1 – IEC connector
Power Switch 1 – Rocker type, SPST
Status Indicator 1 – LED, green
UHD/HD/SD 4096×[email protected]/25/30/50/60Hz, 3840×[email protected]/25/30/50/60Hz, 2048x1080p,[email protected]/24/25/29.97/30/50/59.94/60Hz, [email protected]/59.94/60Hz, [email protected]/59.94/60Hz, 576p, 576i, 480p, 480i
VESA 2560×1600, 2048×1536, 1920×1200, 1680×1050, 1600×1200, 1440×900, 1400×1050, 1366×768, 1360×768, 1280×1024, 1280×800, 1152×768, 1024×768, 800×600, 640×480
Color Space YUV, RGB
Chroma Subsampling 4:4:4, 4:2:2, 4:2:0
Color Depth 8-bit, 10-bit, 12-bit
HDR HDR10, HLG, and Dolby® Vision™ @ 60 Hz
Analog PCM 2Ch (De-embedded)
Optical Output PCM 2Ch (De-embedded)
HDMI Output PCM 2Ch, LPCM 5.1, LPCM 7.1, Dolby® Digital, DTS® 5.1, Dolby Digital Plus™, Dolby TrueHD, DTS-HD Master Audio™, DTS:X™
Sample Rate 32kHz, 44.1kHz, 48kHz, 88.2kHz, 96kHz, 176.4kHz, 192kHz
Bit Rate up to 24-bit
THD+N < 0.05% @ 1 kHz at maximum level
SNR 110.009dB
Frequency Range 20Hz to 20kHz
Bass +12dB to -15dB @ 20Hz – 20kHz
Treble +15dB to -15dB @ 20Hz – 20kHz
Resolution / Distance 4K – Feet 4K – Meters 1080p – Feet 1080p – Meters
HDMI IN / HDMI OUT 15 5 30 10
Maximum TMDS Clock 600 MHz
HDMI 2.0
HDCP 2.2
CEC Not Supported
Temperature Fahrenheit Celsius
Operating 32 to 122 0 to 50
Storage -4 to 140 -20 to 60
Humidity (RH) 20% to 90%, non-condensing
Consumption 28.6 W
Supply Input: 100 – 240 VAC 50/60 Hz
Dimensions Inches Millimeters
H x W x D 1.73 x 17.24 x 10.00 44.00 x 438.00 x 254.00
H x W x D (w/ ears) 2.18 x 18.93 x 10.23 55.50 x 481.00 x 260.00
Rack Size 1 RU
Weight Pounds Kilograms
Device 7.15 3.24
Power Supply CE, FCC, cULus, RoHS, CCC, RCM
Product CE, FCC


New Project

Print Project