HDMI Series
2 In 1 Out HDMI 2.0 Switch with ARC & Audio De-Embedding
The ML-21HD-ARC-H2 enables switching between two HDMI 2.0 source devices while simultaneously extracting audio through dedicated analog stereo and optical SPDIF outputs, supporting 4K@60Hz video with 18Gbps bandwidth
- 2 HDMI 2.0 inputs and 1 HDMI 2.0 output with ARC and CEC support
- Audio de-embedding via analog stereo and optical SPDIF outputs (up to 8-channel)
- Supports 4K@60Hz resolution with 18Gbps bandwidth and 4:4:4 chroma sampling
- Manual, automatic, and scan switching modes with IR remote control
- Built-in EDID management for resolutions from 720P up to 4K@60Hz
Yes
Max Resolution
1080p Full HD
Audio Input
Stereo Analogue
Output
Single HDMI
- In-house manufactured
- 24hr response
- 2,000+ clients served
Product Overview
What makes the ML-21HD-ARC-H2
The ML-21HD-ARC-H2 features two HDMI 2.0 input ports and one HDMI 2.0 output port, enabling users to switch between two HDMI source devices such as media players, computers, set-top boxes, or presentation systems. The selected input is routed to the connected display device while audio can be simultaneously extracted through dedicated audio outputs.
The unit includes two audio de-embedded outputs: one analog stereo output and one optical SPDIF output supporting up to 8-channel audio. This allows integration with external audio systems such as amplifiers, sound processors, or speaker setups, making the ML-21HD-ARC-H2 suitable for AV environments that require independent audio routing alongside video distribution.
The device supports HDMI ARC (Audio Return Channel) and CEC (Consumer Electronics Control). ARC allows audio signals from the display device to be routed back through the HDMI cable to connected audio systems, while CEC enables compatible HDMI devices to communicate and control certain operations automatically, improving overall system integration.
With built-in EDID management supporting resolutions from 720P up to 4K@60Hz, the ML-21HD-ARC-H2 ensures proper communication between source devices and displays, preventing resolution mismatches and maintaining stable signal performance across professional AV installations.
HDMI Inputs
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Key Features
Built for modern AV environments
4K HDMI switching with simultaneous audio extraction, ARC support, and flexible control options for professional AV installations.
4K@60Hz HDMI 2.0 Video Performance
The ML-21HD-ARC-H2 supports HDMI 2.0 video transmission with a bandwidth capacity of up to 18Gbps, ensuring smooth delivery of high-resolution video content without signal degradation.
- 4Kx2K resolution at 60Hz
- 4:4:4 chroma sampling for accurate color reproduction
- HDMI 3D video format support
- Compatible with modern HDMI 2.0 source devices
Advanced Audio De-Embedding
Audio extracted from the HDMI stream is simultaneously delivered through two independent outputs, enabling integration with external audio equipment alongside video distribution.
- Analog stereo output for connection to amplifiers or powered speakers
- Optical SPDIF output supporting up to 8-channel digital audio
- Both outputs operate simultaneously with HDMI video output
ARC and CEC Functionality
HDMI ARC enables audio signals from the display to be routed back through the HDMI cable to connected audio systems. CEC allows compatible devices to communicate and control certain operations automatically.
- ARC can be enabled or disabled depending on system requirements
- CEC improves overall system integration between connected devices
Flexible Switching Modes
Three switching modes allow the device to adapt to different operational environments, from manual operator control to fully automatic source detection and sequential cycling.
- Manual switching via device controls or IR remote
- Automatic mode detects and switches to the active HDMI source
- Scan mode cycles through inputs at preset intervals
Built-in EDID Management
Integrated EDID management ensures proper communication between source devices and connected displays, preventing resolution mismatches and improving signal stability across installations.
- Supports 720P, 1080P, 4K@30Hz, and 4K@60Hz EDID modes
- Prevents compatibility issues between sources and displays
Control and Connectivity Interfaces
Multiple control interfaces support integration with professional AV systems and centralized control environments, enabling both manual and automated operation.
- Built-in IR remote control included
- RS232 interface for system integration with AV controllers
- Provision for external IR sensor extension
Installation
Connecting sources, display, and audio systems
The ML-21HD-ARC-H2 is a compact 2-input HDMI switch that integrates directly into existing AV signal chains. Both HDMI sources connect to the input ports and the output feeds the display, while audio outputs run simultaneously to external audio equipment.
01
Basic HDMI Source Switching
Connect two HDMI source devices — such as a media player and a computer — to the two HDMI 2.0 input ports. The single HDMI 2.0 output routes the selected source to the connected display. Switching between sources is performed manually via the device controls or the included IR remote, or automatically when the device detects an active signal.
02
Audio De-Embedding and External Audio Integration
The analog stereo output connects to external amplifiers or powered speakers, while the optical SPDIF output connects to surround sound processors, AV receivers, or professional audio equipment supporting up to 8-channel audio. Both audio outputs operate simultaneously with the HDMI video output, allowing independent audio routing within the installation.
Where the ML-21HD-ARC-H2 is deployed
Corporate Conference Rooms
Switch between presentation laptops, video conferencing systems, or media players while simultaneously routing audio to room speaker systems through the analog or SPDIF outputs.
Home Theatre Systems
Connect two HDMI sources to a single display and extract surround sound audio to an AV receiver via the optical SPDIF output. ARC support enables audio return from the display back to connected audio equipment.
Broadcast and Production Environments
Route 4K@60Hz video from two sources to a professional monitor while independently extracting the audio stream for mixing or monitoring through a separate audio processor or mixer.
Education and Lecture Halls
Switch between an instructor's computer and an external playback device while feeding audio to room amplification systems. Scan mode supports automated cycling of connected sources in demonstration environments.
Digital Signage and Retail Displays
Manage two HDMI content sources on a single display with automatic source switching. The scan mode enables sequential cycling between content feeds at configurable intervals for unattended display installations.
Multimedia and AV Rack Installations
Integrate into professional AV rack setups where RS232 control and external IR sensor extension allow the switch to be operated remotely from an AV control processor or centralized control system.
Full specification sheet
- Video Specifications
- Ports and Interfaces
- Audio De-Embedding
- ARC and CEC
- Switching Modes
- EDID Management
- Control Interfaces
FAQs about the ML-21HD-ARC-H2
What is the primary function of the ML-21HD-ARC-H2?
It allows two HDMI source devices to be connected to one display while extracting audio through separate analog and optical outputs. The selected input is routed to the display while audio is simultaneously available through the de-embedded outputs for connection to external audio equipment.
Does this switch support 4K video resolution?
Yes, it supports 4Kx2K resolution at 60Hz with full 4:4:4 chroma sampling and 18Gbps bandwidth. HDMI 3D video formats are also supported.
What audio outputs are available on this device?
The device provides one analog stereo output and one optical SPDIF output supporting up to 8-channel audio. Both outputs are available simultaneously and can be connected to amplifiers, powered speakers, AV receivers, or surround sound processors.
What is the purpose of ARC and CEC in this switch?
ARC allows audio from the display to return through the HDMI cable to connected audio systems, while CEC enables communication and control between connected HDMI devices. ARC can be enabled or disabled depending on system requirements. CEC improves overall system integration by allowing compatible devices to control certain operations automatically.
How does EDID management help in installations?
EDID management ensures that source devices output compatible resolutions, preventing signal issues and improving display stability. The ML-21HD-ARC-H2 supports EDID modes including 720P, 1080P, 4K@30Hz, and 4K@60Hz, making it compatible with a wide range of source and display combinations.
What switching modes does the ML-21HD-ARC-H2 support?
The device supports three switching modes. Manual mode allows the user to select the desired input via device controls or the included IR remote. Automatic mode detects the active HDMI signal and switches to it without user intervention. Scan mode cycles through connected inputs sequentially at preset intervals, which is useful for monitoring or demonstration environments.
Can the ML-21HD-ARC-H2 be integrated with an AV control system?
Yes. The device includes an RS232 interface for integration with professional AV control systems and automation platforms. An external IR sensor extension is also supported, allowing the switch to be controlled from a remote IR receiver position when installed inside a rack or enclosed cabinet.
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