HDMI 2.0 Audio De-embedder ALF-CHKA2 - Extract 4K Audio Cleanly

Our review of the ALF-CHKA2 finds it is a compact, no-frills solution for anyone who needs to extract audio from a 4K HDMI feed. Designed for simple installation and reliable operation, the unit excels at separating audio to balanced L/R, analog RCA, or coaxial digital outputs while maintaining support for 4K@60Hz 4:4:4 HDR. The single biggest reason to buy is its straightforward compatibility with a range of audio processors and receivers via three audio modes, making it a practical choice for home A/V setups or small professional rigs that need a clean audio pass-through without changing video quality.

Key Features

• Audio Extraction: Extracts audio from a 4K HDMI feed to stereo balanced L/R, analog RCA, or coaxial digital outputs so you can connect legacy or professional audio gear.
• High Bandwidth: Supports up to 18Gbps transmission to preserve full HDMI 2.0 video quality while audio is de-embedded.
• Three Audio Modes: Pass, Bitstream, and PCM modes provide flexibility to match receivers or processors and avoid compatibility issues.
• 4K@60Hz Support: Handles 4K@60Hz with 4:4:4 chroma and HDR pass-through so video remains intact when audio is pulled out.
• EDID & CEC Pass-through: Keeps device communication and basic control signals intact for simpler integration into existing systems.
• Compact Form: Small footprint minimizes rack or shelf space and is easy to tuck into an AV cabinet or under a display.

Who It's For

The ALF-CHKA2 is aimed at homeowners, integrators, and small studios that need to route HDMI video to a display while sending audio to a separate receiver, mixer, or recording device. Its multiple output options and audio modes make it especially useful when dealing with older analog equipment or digital coaxial inputs alongside modern HDMI sources.

It is less suitable for systems that require advanced audio decoding, multichannel analog outputs beyond stereo, or integrated DSP features; users needing multichannel analog extraction or professional AES outputs should look for higher-end, feature-rich extractors.

Pros & Cons

Pros

• Simple extraction to balanced L/R, RCA, or coaxial digital for wide compatibility.
• Maintains 4K@60Hz 4:4:4 HDR video with an 18Gbps transmission rate.
• Three audio modes improve compatibility with a variety of receivers and processors.
• Compact size makes it easy to install in tight spaces.

Cons

• Only stereo analog and coaxial digital outputs are provided, so no multichannel analog extraction.
• Does not include advanced audio processing or decoding features for complex studio workflows.

Specifications

Our Verdict

The ALF-CHKA2 is a practical, value-oriented HDMI audio de-embedder for anyone who needs reliable stereo or digital coaxial extraction without sacrificing 4K video quality. It is ideal for home theaters and small AV installations where simple, compact hardware and broad device compatibility matter most, even though it does not offer multichannel analog outputs or advanced processing.

Frequently Asked Questions

Can this unit pass HDR and 4K video while extracting audio?
Yes. It supports 4K@60Hz 4:4:4 and HDR while de-embedding audio to the designated outputs.

Which audio outputs are available?
The unit provides stereo balanced L/R, analog RCA, and coaxial digital audio outputs.

Will it work with my receiver if audio formats vary?
It offers Pass, Bitstream, and PCM modes so you can choose the format that best matches your receiver or audio processor.