EDID Manager & Detective
Forty EDID banks on one rotary control: eight FHD presets, twenty-four UHD presets in three audio flavours, seven you program yourself and one holding a copy of the connected display.
Solve most HDMI issues
Dr HDMI 4K
18Gbps EDID Manager, HDMI/DVI-D Emulator, Repeater & Handshake Doctor
Forty EDID banks on one rotary control. Tell any source exactly what it is connected to, fix handshakes and HDR, keep a player awake, and push a clean signal fifty metres down a cable — from a box the size of a matchbox.
18Gbps4K60 4:4:4
0msLatency
40EDID banks
50mCable reach
HDR10 · HDR10+ · HLG · Dolby Vision · LLDV · ALLM · IMAX · Atmos · DTS:X · HDMI 2.0b · HDCP compliant
Why Dr.HDMI 4K
One small box between source and display.
Before a single pixel moves, the source reads the EDID of whatever is plugged in and decides what it may send. If that EDID is wrong, missing or comes from the weakest device in the chain, you get a black screen, no HDR, or stereo where Atmos should be.
18Gbps with 0ms latency
Full 600MHz single-link bandwidth, HDMI 2.0b compliant, nothing added to the signal path. 4K 3840×2160 at 60Hz 4:4:4 passes through without losing sync.
Emulator & repeater
The unit answers as a display when there isn't one. Input equalisation extends a run to 50 metres and the +5V injector powers active cables the source can't drive on its own.
Dolby Vision, HDR10+ and HLG
All DV modes including mode 0, 1, 2 and LLDV, with dedicated banks copied from known DV displays. Advertise BT.2020 and HDR and the source will send it.
Sink EDID sniffing
Press copy and the connected display's EDID lands in a bank, ready to reuse anywhere in the chain or to save to your PC with the Windows utility.
HTPC mode & hot-plug control
Hide the sink status so a media player, HTPC or signage box never sleeps and never loses its resolution. Reset the hot-plug event on the fly whenever a source needs a nudge.
RS232 control
Switch banks remotely from a control system, or add the GoBlue Bluetooth dongle for Android, iOS and IR control. USB upgradable and flashable from any Windows machine.
HDCP left untouched
The unit sniffs DDC packets and filters only the EDID requests. Every HDCP handshake passes through, so protected sources keep playing while you change what they are told.
What owners use it for
Real problems it solves every day
From home cinemas, living rooms, showrooms and professional installs — the situations where this box goes in and stays in.
Black screen or 'no signal' between source and display
The job this box was built for, and the reason it is in most people's chain. The source asks the display what it supports, gets a confusing answer from a receiver, matrix or long cable run, and gives up. Dr.HDMI 4K ends that conversation on your terms: a clean fixed EDID and a proper hot-plug event, so the source configures itself once and stays configured. Turn the dial one bank lower and you have your next test in two seconds instead of another evening of swapping cables.
An AVR or soundbar in the middle that breaks 4K HDR
Receivers routinely report an EDID that costs you HDR, chroma or bandwidth. Put the unit in front of the source and it stops caring what the receiver claims.
Full lossless audio that the TV's EDID doesn't advertise
A recurring forum case: the display's own EDID reports only Dolby Digital, so the receiver never sees TrueHD or DTS-HD MA. Pick a green FULLAUDIO bank and the source offers everything again.
HDR that is too dark on a projector — force HDR10 or SDR instead
Owners of Epson, JVC and Sony projectors use a bank without HDR or DV flags so the player tone maps to SDR itself rather than sending HDR the projector can't do justice.
Dolby Vision on a display that has none — the LLDV trick
Load an LLDV-capable EDID into a custom bank and your Apple TV 4K, Shield or player switches to player-led Dolby Vision. It genuinely works, with two conditions: your projector needs a forced HDR mode (LLDV carries no HDR infoframe), and tuning the DV max luminance means building the EDID yourself in an editor, because this unit has no setting for it. Want it with a knob instead of a hex editor? That is what the Arcana 2 and Vertex² are for.
HTPC and NUC setups that lose their desktop
Windows rearranges icons and forgets the resolution every time the TV powers off or the AVR switches input. HTPC mode hides the sink status, so the machine keeps thinking the display is there.
Consoles and monitors that won't agree on a mode
PS5 and Xbox Series X owners use it to present an EDID a gaming monitor doesn't offer by itself — 1080p120 for example, or one that advertises HDR. Everything has to fit inside 18Gbps, but within that limit the source outputs what the EDID says.
A source that must never go to sleep
Integrators keep one in the chain to hold a media player, signage box or headless machine in a defined state, output alive, whether or not a display is switched on.
Limiting what a source is allowed to send
Cap the output at 1080p, 1080i, 720p or 4K30 by choosing a bank that advertises nothing more. Useful for older projectors, capture cards, video-over-IP extenders and second zones.
Long cable runs that drop out
Input equalisation extends signal integrity up to 50 metres and the +5V injector powers active cables the source can't drive. For longer runs, pair it with an HDfury 4K fibre HDMI cable.
Matrices, splitters and switchers reporting the wrong EDID
Give every leg of an installation the same fixed EDID instead of whatever the last connected display happened to negotiate.
Cloning a display you already trust
Copy the EDID of a working TV into bank 8 with one button, or pull it off with the Windows utility, edit it and write it back into one of the seven custom banks.
Rack installations you can't reach
RS232 switches banks remotely from a control system, the optional GoBlue dongle adds phone, tablet and IR control, and the firmware updates over USB from any Windows machine.
Be honest about it
What it deliberately doesn't do
The most common reason someone is disappointed by this box is buying it for a job it was never built for. On the forums that gets answered a dozen times a year, so here it is up front.
- It does not convert HDCP. HDCP 2.2 to 1.4 conversion needs a Vertex² or VRROOM. Dr.HDMI 4K passes HDCP through untouched — it only filters EDID requests.
- It does not tone map HDR. Tone mapping happens in your display, or in the player. This box changes what the source is told, not what it does with the picture.
- It does not edit HDR metadata or infoframes. Setting MaxCLL, MaxFALL or the Dolby Vision maximum luminance, and injecting an HDR infoframe, needs a Vertex² or Arcana 2.
- It does not split video from audio. 4K straight to the display and audio separately to an older receiver is a Vertex² or VRROOM job.
- It stops at 18Gbps. HDMI 2.0b, up to 4K60 4:4:4. For 4K120, 8K or 40Gbps sources, look at the Dr.HDMI 8K or VRROOM.
Rule of thumb
Is your problem an EDID problem?
If the source is sending the wrong thing, or nothing at all, because of what it was told about the display — yes, and this is the right tool.
If the picture arrives but looks wrong, if copy protection is refused, or if audio and video need to go different ways — no, and a bigger HDfury is the answer.
Not sure? Describe your chain on the contact page and ask before you buy.
Connectivity
In one side, out the other
No menus, no configuration, no computer needed. Power it, place it in the chain and turn the control.
Input side
- HDMI in18Gbps · HDMI 2.0b
- Mini USB-Bpower · firmware · EDID
- Rotary controlbank up/down · hold for table
- Copy sink buttonreads the display EDID
DR.HDMI 4KEDID manager · emulator · repeater
Output side
- HDMI out18Gbps · HDCP & CEC
- +5V injectorpowers active cables
- RS232remote bank switching
- Status LEDfive table colours
Works with any source up to 18Gbps
PlayStation 5, Xbox Series X, Apple TV 4K, Nvidia Shield, Blu-ray and UHD Blu-ray players, satellite and cable boxes, media players, laptops and HTPCs.
And anything downstream
TVs, projectors, AV receivers, soundbars, matrix switchers, splitters, extenders and video walls — down to legacy DVI-D monitors.
EDID
Forty banks, five LED colours
Hold the rotary switch down to cycle tables: FHD, UHD 2CH, UHD 5.1, UHD FS and Custom. Press up or down for the eight banks inside, stop for a second, and the unit activates the EDID and fires a clean hot-plug event.
Printed on the bottom side of the unit. Eight factory presets for 1080p, 1080i, 720p and 480p, updatable by firmware.
- 11080p60-444-225M-3D-FULLAUDIO
- 21080p60-444-225M-3D-SPDIF
- 31080p60-444-8b-150M-3D-STEREO
- 41080p24-444-12b-112M-SPDIF
- 51080i60-444-8b-75M-SPDIF
- 61080i60-444-8b-75M-STEREO
- 7720p60-444-8b-75M-SPDIF
- 8480p60-444-8b-30M-STEREO
Printed on the top of the unit. The same eight UHD video modes as yellow and red, advertising the complete audio capability including Atmos and DTS:X.
- 14k60-444-600M-HDR-BT2020-3D-FULLAUDIO
- 24k60-444-600M-3D-FULLAUDIO
- 34k60-420-12b-450M-HDR-BT2020-3D-FULLAUDIO
- 44k60-420-12b-450M-3D-FULLAUDIO
- 54k60-420-8b-300M-HDR-BT2020-3D-FULLAUDIO
- 64k60-420-8b-300M-3D-FULLAUDIO
- 74k30-444-300M-HDR-BT2020-3D-FULLAUDIO
- 84k30-444-300M-3D-FULLAUDIO
Printed on the top of the unit. Caps the advertised audio at what an SPDIF return or older AVR can carry.
- 14k60-444-600M-HDR-BT2020-3D-SPDIF
- 24k60-444-600M-3D-SPDIF
- 34k60-420-12b-450M-HDR-BT2020-3D-SPDIF
- 44k60-420-12b-450M-3D-SPDIF
- 54k60-420-8b-300M-HDR-BT2020-3D-SPDIF
- 64k60-420-8b-300M-3D-SPDIF
- 74k30-444-300M-HDR-BT2020-3D-SPDIF
- 84k30-444-300M-3D-SPDIF
Printed on the top of the unit. Two-channel only, for chains where anything else causes dropouts or silence.
- 14k60-444-600M-HDR-BT2020-3D-STEREO
- 24k60-444-600M-3D-STEREO
- 34k60-420-12b-450M-HDR-BT2020-3D-STEREO
- 44k60-420-12b-450M-3D-STEREO
- 54k60-420-8b-300M-HDR-BT2020-3D-STEREO
- 64k60-420-8b-300M-3D-STEREO
- 74k30-444-300M-HDR-BT2020-3D-STEREO
- 84k30-444-300M-3D-STEREO
Printed on the top of the unit. Banks 1–7 are yours to overwrite with the Windows utility; bank 8 always holds the EDID copied from the connected display.
- 1SAMSUNG Q9FN XBOXLowLat HDR10+
- 2SONY A1 — DV/LLDV version 2
- 3LG 65C7 — DV version 1
- 4VIZIO M50E1 — DV version 0
- 54k60-420-12b-450M-BT2020-3D-FULLAUDIO
- 64k60-420-12b-450M-BT2020-3D-STEREO
- 71080p60-12b-222M-HDR-BT2020-3D-FULLAUDIO
- 8COPY DOWNSTREAM EDID
Specifications
Technical specifications
Video
| Standard | HDMI 2.0b compliant |
| Bandwidth | 18Gbps / 600MHz, single link |
| Latency | 0ms |
| Max resolution | 4K 3840×2160 at 60Hz, 4:4:4 |
| Dynamic range | HDR, HDR10+, HLG, Dolby Vision (modes 0, 1, 2), LLDV |
| Colour | BT.2020, up to 12-bit |
| Other | ALLM, IMAX, 3D, any resolution incl. HDMI standards |
Audio
| Formats | Dolby Atmos, DTS:X, TrueHD, DTS-HD MA and below |
| Per bank | Full audio, SPDIF-limited or stereo |
| Lip sync | Pass-through |
EDID
| Banks | 40 — 8 FHD, 24 UHD, 7 programmable, 1 copied |
| Editing | User programmable over USB, Windows utility |
| Sniffing | Copies the connected display's EDID into a bank |
| Extended EDID | CEA-861, 256 bytes |
| Hot plug | HPD event can be reset on the fly |
Signal & control
| Cable compensation | Input equalisation up to 50 metres |
| Power injection | +5V HDMI injector for active cables |
| HTPC mode | Hides the output device status |
| Remote control | RS232 built in; optional GoBlue dongle adds Bluetooth and IR |
| Firmware | USB upgradable and flashable |
| HDCP | Pass-through, HDCP compliant |
| CEC | Protocol pass-through |
Physical
| Connectors | HDMI female in and out, mini USB-B female |
| Power | Universal USB power adaptor |
| Dimensions | 60 × 40 × 20 mm |
| Weight | 50 grams |
| Compliance | HDCP / FCC / CE |
| Warranty | 1 year, extendable |
In the box
| Included | Dr.HDMI 4K processor |
| Power supply | Your choice of EU, UK, US or AU/NZ plug |
| Cable | USB to mini USB |
| Optional | GoBlue dongle for Android, iOS and IR control |
Gallery
In the box
Dr.HDMI 4K processor, your choice of power supply (EU, UK, US or AU/NZ) and a USB to mini USB cable. RS232 is built in; the GoBlue Bluetooth and infrared dongle for Android and iOS control is a separate accessory.
The rest of the range
When you need more than an EDID manager
Dr.HDMI 4K does one job properly. If your problem turns out to be a different one, HDfury builds the box for it — and the two work together in the same chain.
Dr.HDMI 8K
The same idea at HDMI 2.1 speeds: FRL5, 40Gbps, 1200MHz with VRR, 100 predefined banks, an OLED and an embedded web server. For the 8K and 4K120 chains this unit cannot carry.
Arcana 2
The eARC specialist. Full audio from any HDMI source to an eARC or ARC sound system, and DV/LLDV to an HDR10 display with the nits value adjustable from a menu instead of an EDID editor.
Vertex²
The full toolbox: 4×2 matrix, scaler, HDCP doctor, HDR metadata and infoframe control, eARC extraction and a web interface.
VRROOM
40Gbps flagship. Everything the Vertex² does, at HDMI 2.1 speeds with 4K120 and 8K.
Dr.HDMI
The original 1080p EDID manager. Smaller, cheaper, and enough when nothing in the chain goes beyond Full HD.
4K fibre HDMI cable
For runs past what copper and equalisation can rescue. Pairs with the +5V injector on this unit.
FAQ
Frequently asked questions
How much power can the Dr.HDMI 4K supply?
With a power supply connected to the USB port it passes on as much as that supply can deliver. That is what makes the +5V injector useful for active cables.
How do I switch between banks?
Press up or down on the rotary button to move through the forty banks. Stop for about a second and the unit activates the selected EDID and starts the hot-plug event, telling the source that the EDID changed. That takes roughly two seconds, during which the EDID is locked. After that you are free to change it again.
How do I switch between EDID tables?
Hold the rotary switch down in any position to cycle through the five tables: FHD, UHD 2CH, UHD 5.1, UHD FS and Custom. The LED colour confirms which table you are in.
What does the copy sink button do?
It reads the EDID of the connected display and stores it in custom bank 8 on the white table. A hot-plug event follows automatically and completes in about two seconds.
Which banks can I overwrite?
Custom banks 1 to 7 on the white table are user programmable with the Windows utility. Bank 8 is reserved for the copied display EDID. The blue, green, yellow and red presets are factory set and only change with a firmware update.
Does it break HDCP?
No. The unit sniffs DDC packets and filters only the EDID requests, passing every HDCP handshake through untouched. It is HDCP compliant.
Can I control it remotely?
Yes. RS232 is built in for control systems. Adding the optional GoBlue Bluetooth dongle gives you Android, iOS and IR control.
Do I need the Windows software?
No. The unit does its job standalone with the rotary control. The software is there when you want to write custom EDID tables, save a copied EDID or update the firmware.
Can it give my projector Dolby Vision?
In many setups, yes — this is the LLDV trick. Load an EDID that reports Dolby Vision support into a custom bank and your source outputs player-led Dolby Vision, doing the tone mapping itself. Two conditions: your projector needs a forced HDR mode, because LLDV carries no HDR infoframe, and tuning the maximum luminance in the DV block means building the EDID in an external editor first. If you want that as a setting rather than handwork, the Arcana 2 and Vertex² were built for it.
What is in the box?
The Dr.HDMI 4K processor, a power supply for your region, and a USB to mini-USB cable.
Get yours
Ready to fix your HDMI chain for good?
Dr.HDMI 4K is the box AV integrators keep in the toolbag and home-cinema owners end up leaving in the rack for good.
Buy Dr.HDMI 4K