4K HDMI ARC Audio Decoder with Dolby & DTS Downmix
KanexPro AUD-DCODEARC-4K extracts ARC audio from HDMI TVs and downmixes Dolby 5.1, DTS 5.1, or PCM 2.0 to analog stereo via RCA and 3.5mm. USB-powered…
Extracts audio from any ARC-enabled HDMI TV and downmixes Dolby 5.1, DTS 5.1, or PCM 2.0 to 2-channel analog stereo via dual outputs (RCA and 3.5mm). CEC support enables TV remote volume control for seamless operation. Designed for home theaters, hospitality installs, and conference rooms, the AUD-DCODEARC-4K bridges the gap between modern ARC-only TVs and legacy analog audio equipment — powered entirely via USB with no external adapter required.
- HDMI ARC audio extraction from any ARC-enabled TV to analog stereo output
- Licensed Dolby Digital 5.1 and DTS 5.1 decoding with downmix to 2-channel stereo
- PCM 2.0 stereo pass-through for standard audio sources
- Dual analog outputs: 3.5mm stereo jack and RCA L/R for flexible connectivity
- CEC volume control — adjust volume using the TV remote
- USB-powered (5V/500mA) — can run from TV USB port with no wall adapter
- Front-panel LED indicators for power, ARC link, and audio format (PCM/Dolby/DTS)
- Compact aluminum enclosure (70x65x27mm, 80g) for discreet installation behind displays
- ESD protection: +/-8kV air-gap, +/-4kV contact discharge
Specifications| Specification | Value |
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| HDMI Compliance | HDMI 1.3 or above |
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| HDMI Audio Formats | PCM 2.0, Dolby 5.1, DTS 5.1 |
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| L/R Audio Format | Analog Stereo 2CH |
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| Vmax | 2 Vrms |
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| SNR | >90 dB |
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| THD+N | <0.1% (Vmax); 0.001%-0.01% (Vbest) |
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| Crosstalk | >80 dB |
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| Frequency Response | 20 Hz - 20 kHz +/-1 dB |
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| ESD Protection | +/-8kV (air-gap) / +/-4kV (contact) |
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| Input | 1x HDMI Type A [19-pin female] (ARC IN), 1x Micro USB (power) |
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| Output | 1x 3.5mm Stereo Jack, 2x RCA L/R |
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| Housing | Aluminum Enclosure, Silver |
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| Dimensions | 70mm (W) x 65mm (D) x 27mm (H) |
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| Weight | 80g |
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| Power Supply | USB 5V/500mA |
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| Power Consumption | 0.86W (Max) |
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| Operating Temperature | 0C - 40C (32F - 104F) |
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| Storage Temperature | -20C - 60C (-4F - 140F) |
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| Relative Humidity | 20-90% RH (no condensation) |
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| 1x | HDMI ARC Audio Down-Mixer |
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| 1x | USB Cable (USB-A to Micro USB) |
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| 1x | User Manual |
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Questions
- Does this support eARC?
- No, ARC only. For eARC support with Dolby Atmos and DTS:X, use the KanexPro AUD-DEBEDEARC-4K.
- What audio formats are decoded?
- PCM 2.0, Dolby Digital 5.1, and DTS 5.1 are decoded and downmixed to 2-channel analog stereo.
- Can I connect this to an amplifier?
- Yes. Use the RCA L/R outputs to connect to any amplifier, powered speaker, or AV receiver with analog inputs.
- Can I use headphones with this device?
- Yes. The 3.5mm stereo jack output connects directly to headphones or a headphone amplifier.
- How do I power the unit?
- Connect the included USB cable to any USB 5V source - the TV USB port, a USB wall adapter, or a USB power bank.
- Can I use the TV remote to control volume?
- Yes. CEC pass-through allows the TV remote to control the analog output volume level.
- No audio output from the device?
- Verify ARC is enabled in the TV settings (usually under Sound > Audio Output). Ensure the HDMI cable is connected to the TV ARC-designated HDMI port. Check that the USB power cable is connected and the PWR LED is lit.
- How do I know which audio format is being decoded?
- The front-panel Audio Decoding LED indicates: solid red = PCM or no signal, blinking red = Dolby decoding, blinking green = DTS decoding.
- What is the upsell path for customers needing more features?
- Recommend the AUD-DEBEDEARC-4K for eARC, Dolby Atmos, DTS:X, optical output, and 4K60 HDMI passthrough.
- What verticals is this product best suited for?
- Residential AV retrofits, hospitality TV audio, corporate huddle rooms, and assistive listening stations in healthcare or public spaces.