Connecting headrests with monitors to a radio based on Android Auto or Android car radio is a task faced by owners who want to create a full-fledged multimedia system in a car. This solution allows rear seat passengers to watch movies, play games or use navigation while the driver controls basic functions through the head unit. However, the connection process often raises questions: what cables are needed, how to set up image output, and why monitors may not work after connection.

In this article we will analyze all the stages - from choosing equipment to fine tuning video output and sound. You will learn how to avoid common mistakes, for example signal loss when reverse gear is engaged or incorrect display of resolution. We will also look at connection options for different radio models (Pioneer, Sony XAV-AX, Joying) and types of headrests (with AV-in, HDMI, RCA).

If you have already tried to connect monitors, but encountered problems - for example, the screen is blinking, there is no sound or the radio does not see the device - in At the end of the article there is a section with solutions to problems. And for those who are just planning a purchase, we have compiled a compatibility table of popular models.

📊 What type of headrests do you use?
With a standard AV input (RCA)
With an HDMI port
Wireless (Wi-Fi/Bluetooth)
Not selected yet

1. What equipment will be needed for connection

Before you begin installation, make sure that you have everything you need. The minimum set depends on the type of connection (analog or digital) and your model. radio. Here is a basic list:

  • 🔌 Cables for video transmission: RCA-RCA (yellow "tulip") for an analog signal or HDMI-HDMI for a digital one. The length depends on the distance between the radio and the headrests (usually 2-4 meters).
  • 🔊 Audio cables: RCA-RCA (red/white) for audio output or 3.5 mm jackif the radio supports headphone output.
  • ⚡ Power supply: if the headrests do not receive power from the radio, you will need a separate adapter 12V (for example, from cigarette lighter).
  • 🔧 Splitters and adapters: for example, HDMI splitter for connecting multiple monitors to one output or RCA-to-HDMI converter for compatibility of old and new devices.
  • 📱 Android radio with support video output (designation: AV OUT, Video Out, HDMI OutCheck the technical specifications of your model!

Please note: some budget radios (for example, NS-5165B or Atoto A6) only have AV output, and premium segment models (Pioneer AVH-Z5200BT, Sony XAV-9500ES) support HDMI and even Miracast for wireless transmission. If your radio does not have a video output, you will need an additional media player (for example, Android TV Box) or FM transmitter with support video.

⚠️ Attention: If your radio does not have a standard video output, try to connect monitors via USB or Bluetooth will not work - these interfaces are not designed for transmitting a video signal. In this case, consider installing an additional HDMI receiver or replacing the head unit.

2. and headrests

Not all combinations of radios and monitors will work out of the box. The main compatibility criteria are video output type on the radio and input type on the headrests. Below is a table with popular options:

Output type on the radio Input type on the headrests Required cable/adapter Signal quality
RCA (AV OUT) RCA (AV IN) Cable RCA-RCA Medium (480i/576i)
HDMI OUT HDMI IN Cable HDMI-HDMI High (up to 1080p)
RCA (AV OUT) HDMI IN Converter RCA-to-HDMI + power supply 5V Average (depending on the converter)
HDMI OUT RCA (AV IN) Converter HDMI-to-RCA Low (quality loss)
No video output Any Additional Android TV Box or FM transmitter Depends on the device

If your radio supports HDMI ARC or eARC, this simplifies the connection of modern monitors, but such models are rare (for example, Alpine Halo9 iLX-F409). For most Chinese radios (Joying, Dasaita), the circuit with RCAis relevant, since they often do not have HDMI output..

Also check resolution section) will help. screen the headrests. If they only support 800×480, and the radio produces 1920×1080, the image may be cropped or not displayed. In this case, setting the resolution in the radio menu (usually in the Display Settings).

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If you buy headrests with HDMI input, make sure that they support automatic switching of sources (function Auto-Switch). This will eliminate the need to manually select the input each time you turn on the radio.

3. Step-by-step guide: connecting via RCA (analog signal)

This is the most common method, since most budget radios and headrests are equipped RCA connectors. Follow the instructions:

  1. Turn off the power radio and headrests (remove the key from the ignition switch or disconnect the negative terminal of the battery).
  2. Connect the video cable. data-i="144">RCA connector: connect the yellow one on the radio ( RCA connector on the radio (AV OUT) with the same connector on the headrest (AV IN). If there are two monitors, use RCA splitter.
  3. Connect audio cables: red and white RCA (or 3.5 mm jack) for audio output If the headrests have built-in speakers, you can skip this step.
  4. Apply power to the headrests: connect them to 12V (from the cigarette lighter or directly from the battery through the fuse).
  5. Turn on the radio and activate video output mode (usually in the screen or multimedia settings).
  6. Select the signal source on the headrests (button Source or Input → AV).

If the image does not appear:

  • 🔄 Check the polarity of the connection RCA (yellow to yellow, red to red).
  • 🔋 Make sure that the headrests are receiving power (the indicator should be on).
  • 📺 In the radio menu, enable the option Video Output or Rear View Camera (sometimes the video output is tied to this mode).

☑️ Checking the RCA connection

Done: 0 / 5

⚠️ Attention: On some radios (for example, Pioneer AVH-X series), the video output only works when reverse gear is engaged or when the mode is activated Parking Mode. To get around this limitation, you may need to flash firmware or install a decoy relay on the reverse gear wire.

4. Connection via HDMI (digital signal)

If your radio and headrests support HDMI, the image quality will be much better. However, there are nuances here:

Step 1. Check the HDMI version. Recorders are usually equipped with HDMI 1.4, and modern monitors may require HDMI 2.0 for 4K. If the resolution is not supported, the image will be missing or "split".

Step 2. Connect the cable.

  • Connect HDMI OUT on the radio with HDMI IN on the headrest.
  • If there are several monitors, use HDMI splitter with external power (passive splitters may not work).

Step 3. Set up video output in radio.

  1. Go to Settings → Display → HDMI Output.
  2. Select the resolution supported by the headrests (usually 1280×720 or 1920×1080).
  3. Activate option Mirroring (screen mirroring) or Extended Display (extended screen).

Step 4. Select the source on the headrests.

Press Source or Input on the headrest remote control and select HDMI.

If the image does not appear:

  • 🔌 Check that the cable HDMI supports the desired version (for example, for 4K need High-Speed HDMI).
  • 🔄 Try another port HDMI on the headrest (if there are several of them).
  • 📺 In the radio menu, disable HDCP (copy protection) if it interferes with the output.
What to do if the radio does not see HDMI device?

1. Try "hot plugging": first turn on the radio, then connect the HDMI cable.

2. Update the firmware of the radio (on some models Joying and Atoto there are bugs HDMI).

3. Check if HDMI does not conflict with other connected devices (for example, a rear view camera).

5. Audio settings: how to output audio to the headrests

By default, the sound can only go to the front speakers, so that passengers in the rear seats can hear audio from the headrests. output:

Option 1. Via RCA (analog sound).

  • Connect red and white RCA to the corresponding outputs on the radio (usually labeled Audio Out or Subwoofer Out).
  • On the headrests, select mode AV for sound.
  • In the radio settings (Sound Settings), disable Fader (front/rear balance) or set it to position Rear.

Option 2. Through 3.5 mm jack.

If the radio has a headphone output (Audio Out 3.5mm), connect it to the input AUX IN on the headrests. For this you will need a cable 3.5 mm - RCA.

Option 3. Wireless sound (Bluetooth).

Some headrests (for example, Rosen AVD5300) support Bluetooth reception. In this case:

  1. Turn on Bluetooth on the radio and headrests.
  2. Pair the devices (in the menu Bluetooth Settings select the headrests as an audio device).
  3. In the audio settings of the radio, select output to Bluetooth Audio.

⚠️ Attention: When in use Bluetooth for audio, there may be a delay (latency) between video and audio. To reduce lag, select a codec aptX Low Latency (if supported) or use a wired connection.

6. data-i="251">Even with proper connection, problems may occur. Here are the situations and how to resolve them:

Even if the connection is correct, problems may occur. Here are the situations and ways to eliminate them:

Problem Possible cause Solution
No image on the headrests The video output on the radio is inactive Enable Video Output in the settings or check the mode Parking Mode
There is an image, but no sound The audio cables are not connected correctly or the sound output to the rear is disabled speakers Check RCAcables and settings Fader/Balance in the radio
The screen is flickering or "breaking" Incompatible resolution or damaged cable Set a lower resolution in the radio settings or replace the cable with a shielded one
The head restraints turn off when moving Security mode is activated (video blocking on the go) Disable Driving Mode in the settings or install snag on the handbrake wire
The sound comes with a delay Bluetooth with high latency is used Switch to a wired connection or select a codec aptX LL

If the headrests are unstable (switch or turn off on their own), check:

  • 🔋 Power quality: line voltage 12V should be stable (use a multimeter).
  • 📶 Interference from other devices: for example, FM transmitters or radar detectors can create noise in the audio/video signal.
  • 🔄 Radio firmware: on the forums (for example, 4PDA) patches are often posted to fix bugs with the output video.
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If the headrests turn off when you start driving, this is not a malfunction, but a safety feature. Most radios block video output while driving, so as not to distract the driver. To get around this, you can install a trick relay on the handbrake wire or turn off the motion sensor in the service menu (at your own risk!).

7. video output)

If your radio does not have AV OUT or HDMI OUT, there are workarounds:

Method 1. Android TV Box or media player.

  • Connect Android TV Box (for example, Xiaomi Mi Box or Nvidia Shield) to HDMI input headrests.
  • Link the radio and player via Bluetooth or Wi-Fi for control.
  • Use Google Cast or Miracast to broadcast the screen.

Method 2. FM transmitter with video.

Some models (for example Vgate iCar 3) support video transmission via FM-channel. However, the quality will be low and the sound may be distorted.

Method 3. Replacing the radio.

If you need a complete solution, consider radios with HDMI OUT, for example:

  • Pioneer AVH-Z5200BT (supports HDMI and Miracast).
  • Sony XAV-AX8000 (output HDMI and USB video).
  • Atoto S8 Ultra (budget option with RCA i HDMI).

⚠️ Attention: When using Android TV Box in a car, keep in mind that it requires stable power supply 5V/2A. Connect it via USB splitter with surge protection voltage, otherwise the device may burn out when the on-board network surges.

8. Optimizing operation: setup tips

To make the system work stably and conveniently, perform several additional settings:

1. Disable automatic switching to the rear view camera.

On many radios, when you turn on reverse gear, the video automatically switches to the camera, interrupting the output to the headrests. To avoid this:

  1. Go to Settings → Camera.
  2. Disable the option Auto Switch to Camera or Rear View Priority.

2. Set up screen duplication or expansion.

If you want the same thing to be displayed on the headrests as on the radio (for example, navigation), activate Mirror ModeIf required. independent content (for example, a movie for passengers), select Extended Display.

3. Optimize the sound for rear passengers.

In the sound settings (Audio Settings):

  • Set Fader to Rear (sound only rear).
  • Disable Loudness (bass booster) to avoid distorting the voice in movies.
  • Activate DSP (digital audio processing) if the headrests support surround.

4. Protect your equipment. from overheating.

Monitors in headrests often overheat due to poor ventilation. To extend their service life:

  • Install additional ventilation grilles.
  • Use thermal paste for the monitor processor (relevant for models with Android on board).
  • Do not leave the system on when parked for a long time in the sun.
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If you often carry children, install parental controls on the headrests. In the menu Settings → Parental Control you can block access to certain applications or limit viewing time.

FAQ: Frequently asked questions about connecting headrests

Is it possible to connect headrests to the radio without a video output?

Yes, but you will need additional device: Android TV Box, FM transmitter with video or replacing the radio with a model with HDMI OUT/RCA OUT. Wireless solutions (for example Miracast) are also possible, but may cause audio delay.

Why do the headrests turn off when driving?

This is a safety feature that blocks video output while driving. To disable it, you can:

  1. Install a fake relay on the handbrake wire (the radio will "think" that the car is stationary).
  2. Disable the motion sensor in the service menu (firmware required).
  3. Use a radio with a switchable lock (for example, Joying with patch No Motion Lock).

⚠️ Disabling the lock can be dangerous and prohibited by traffic rules in some countries!

How to connect two headrests to one radio?

There are two options:

  1. Through a splitter: for RCA use RCA Y-splitter, for HDMI - active HDMI splitter with power.
  2. Through a radio with two outputs: some models (for example, Pioneer AVH-Z7200BT) have two AV OUT.

If monitors support HDMI ARC, you can connect them in series (from first to second).

What resolution is best to choose for headrests?

The optimal resolution depends on the screen diagonal:

  • For 7–9 inches: 1024×600 or 1280×720.
  • For 10 inches and more: 1920×1080 (Full HD).

If the radio does not support the required resolution, the image will be cropped or stretched. In this case, set it in the radio settings. 16:9 or 4:3 manually.

Is it possible to output only sound to the headrests, without video?

Yes, if the headrests have a separate audio input (RCA or 3.5 mm). Connect only audio cables and leave the video input free. In the radio settings, turn off Video Output, but leave active Audio Output.