Full audio from external sources
Send audio up to Dolby Atmos over TrueHD, Dolby TrueHD, Dolby MAT Atmos, DTS:X, and DTS-HD Master Audio to a compatible audio system, provided the source and audio system support the format.
HDMI 2.0b · 18Gbps · 4K60 · eARC audio
HDfury Arcana 18Gbps
HDfury Arcana 18Gbps separates video and full HDMI audio from one external source. Video goes to your TV, projector, or monitor, while audio goes to Sonos Arc, Beam 2, or another compatible ARC/eARC system—even when the display does not have eARC.
Product description
What does HDfury Arcana 18Gbps do?
Arcana is placed between an external HDMI source and your display. It passes the video signal while creating a separate eARC audio output. Full audio from the source therefore does not first need to be processed or limited by the TV.
For TV, projector, and monitor
Use Sonos Arc, Beam 2, or another ARC/eARC system even with a display without eARC. Video goes to the display through HDMI OUT; audio goes to the audio system through eARC OUT.
18Gbps video pass-through
Supports HDMI 2.0b signals up to 18Gbps, including common 4K60 HDR, HDR10+, HLG, Dolby Vision, and LLDV formats. Limited 4K120 formats may fit within 18Gbps, but Arcana is not a 40Gbps HDMI 2.1/VRR solution.
EDID, scaling, and lip sync
Arcana combines the display’s video capabilities with the audio system’s audio capabilities. Downscaling, HDCP conversion, color settings, HDR metadata, and lip-sync adjustment are also available.
Adjustable lip-sync delay
HDFURY ARCANA provides an adjustable eARC audio delay from 0 to 255 ms. This lets you precisely delay audio that leads the video. According to the manual, the video path itself adds only a few pixel clocks of processing.
Technical overview
Key specifications
The key specifications below are summarized for practical use. Always consult the full manual for menu options, exceptions, and signal-dependent settings.
- HDMI 2.0b up to 18Gbps / 600MHz
- 1× HDMI IN, 1× HDMI OUT, and 1× eARC OUT
- Common video up to 4K60 within 18Gbps; 1080p120 and 1440p120 are supported
- HDR10, HDR10+, HLG, Dolby Vision, and LLDV within compatible signal formats
- Audio up to Atmos/TrueHD, MAT Atmos, DTS:X, and DTS-HD MA
- Optional downscaling from 4K/UHD to 1080p/2K
- EDID, HDCP, chroma, color-space, color-depth, and HDR metadata functions
- OLED, OSD, rotary control, RS232, USB-C power, and USB-A update
Getting Started
Choose the setup that matches your equipment. Each diagram is followed by the complete connection instructions.
One source + ARC
This setup will allow the transfer of full audio up to Dolby Atmos over TrueHD from one HDMI source.
Connect your source HDMI output to the Arcana HDMI input and connect the Arcana HDMI output to any projector, monitor or display. Connect the Arcana eARC output to Sonos Arc or another compatible ARC/eARC sound system.
Alternatively, when your source has a separate audio output in addition to its HDMI output, you can connect the source directly to the projector, monitor or display. Connect the source audio output to the Arcana HDMI input and connect the Arcana eARC output to Sonos Arc.
When your display has an ARC or eARC port, Arcana can also retrieve TV audio. This setup supports full audio up to Dolby Atmos over TrueHD from the HDMI source, ARC audio returned from the TV and CEC volume control from the source or TV to Sonos Arc.
Multi sources
This setup will allow the transfer of full audio up to Dolby Atmos over TrueHD from several HDMI sources connected to an HDMI switcher.
Connect all sources to the HDMI inputs of the HDMI switcher. Connect the HDMI output of the switcher to the Arcana HDMI input.
Connect the Arcana HDMI output to any projector, monitor or display and connect the Arcana eARC output to Sonos Arc or another compatible ARC/eARC sound system.
Multi sources + ARC
This setup will allow the transfer of full audio up to Dolby Atmos over TrueHD from several HDMI sources, ARC audio returned from the TV and CEC volume control from the source or TV to Sonos Arc.
Connect all sources to the HDMI inputs of the HDMI switcher and connect the HDMI switcher output to the Arcana HDMI input.
Connect the Arcana HDMI output to the TV ARC port and connect the Arcana eARC output to Sonos Arc.
4 sources + eARC
This setup will allow the transfer of full audio up to Dolby Atmos over TrueHD from four HDMI sources connected to Vertex2, Diva or Maestro. It also allows ARC or eARC audio from the TV to be processed and transferred.
Connect the TX0 output of Vertex2, Diva or Maestro to the ARC or eARC port of the display and connect its HDMI audio output to the Arcana HDMI input.
Connect the sources to the four HDMI inputs of Vertex2, Diva or Maestro. Connect the Arcana eARC output to Sonos Arc.
Alternatively, connect the TX0 output of Vertex2, Diva or Maestro directly to the Arcana HDMI input and connect the Arcana HDMI audio/video output to the TV ARC or eARC port. This keeps CEC volume control from the source or TV to Sonos Arc available.
Multi sources + eARC
This setup will allow the transfer of full audio up to Dolby Atmos over TrueHD from several HDMI sources connected to an HDMI switcher while also receiving ARC or eARC audio from the TV.
Connect SHARC to the ARC or eARC port of the display and connect the HDMI video/audio output of SHARC to one of the HDMI inputs of the switcher.
Connect the other sources to the remaining HDMI inputs of the HDMI switcher and connect the HDMI switcher output to the Arcana HDMI input.
Connect the Arcana HDMI output to any projector, monitor or display and connect the Arcana eARC output to Sonos Arc.
Product photos
View HDFURY ARCANA from every angle
Open a photo for a larger view of the HDMI input, HDMI and eARC outputs, enclosure, and multiple devices.
FAQ
Frequently asked questions
The answers below clarify the most common misunderstandings before installation or purchase.
Does HDFURY ARCANA make my ARC TV eARC-capable?
No. Arcana does not change the TV’s connection or capabilities. It provides a separate eARC audio output from an external HDMI source, allowing that source to send full audio to the audio system.
Can I send Atmos/TrueHD to Sonos Arc without an eARC TV?
Yes, from an external HDMI source. The source passes through Arcana; video goes to the display and full audio goes directly to Sonos Arc or another compatible eARC system.
Does audio from built-in TV apps also work?
Only within the TV’s ARC/eARC capabilities. Arcana can process the returning ARC/eARC signal, but it cannot create support that is missing from the TV app or TV output.
Welke HDMI-kabels heb ik nodig?
Use reliable 18Gbps cables between source, Arcana, and display. Keep copper cables short where possible. The cable from Arcana to Sonos Arc or another eARC system only needs reliable ARC/eARC support.
Does HDFURY ARCANA support 4K120 and VRR?
Arcana is primarily an 18Gbps HDMI 2.0b product. Some limited 4K120 formats fit within 18Gbps, but modern 4K120 10-bit HDR/VRR signals require Arcana 2 or another 40Gbps HDMI 2.1 solution.
Can I connect multiple sources?
Yes, with an HDMI switch, matrix, or receiver before Arcana. That intermediate equipment must support the full bandwidth, HDR, HDCP, and audio formats you use.
Why am I not getting Atmos?
Check whether the source uses bitstream/passthrough, whether the content actually contains Atmos/TrueHD, whether the audio system supports the format, and whether the selected EDID correctly reports the audio capabilities. TV apps often provide a different Atmos format from external players.
Lost HDFURY ARCANA lipsync op?
HDFURY ARCANA extracts audio directly from the external HDMI source, often bypassing delay caused by decoding or re-encoding in the TV. When audio leads the picture, enable delay in the eARC menu and set a value from 0 to 255 ms. Start low and increase it gradually. The device cannot move audio forward when it already arrives too late; in that case, check the source, TV, and soundbar settings. Apple TV users can also use Wireless Audio Sync.
Sources, sales and update status
Technical specifications and firmware information are checked against the official HDfury product pages. Product purchases are handled through HDfury.eu. Last technical review: 23 July 2026.