ZX settings on an Android radio: a complete guide to setting up sound in a car

If you are the owner of a car with an Android radio, you have probably encountered term ZX settings in the sound parameters menu. This mysterious abbreviation often raises questions: what does it mean, how does it affect audio quality, and why setting it can radically change the sound of music in the cabin. Unlike standard equalizers or channel balance, the ZX mode works at a deeper level of signal processing, affecting the spatial perception of sound and the correction of acoustic distortions.

In this article we will look in detail at what is hidden behind ZX settings (sometimes called ZX Sound or ZX Audio), how they are implemented in the firmware of popular brands - Pumpkin, Xtrons, Joying and others, and we will also give step-by-step recommendations for optimization for specific speaker systems. We will pay special attention to typical mistakes that spoil the sound instead of improving it, and we will explain why factory presets are not always suitable for your car.

What are ZX settings and why you need them

Abbreviation ZX stands for Zero Cross (zero crossing) - a dynamic audio signal processing technology originally developed for professional sound systems. In the context of Android radios, this term refers to a set of algorithms that:

• 🔊 Correct phase distortions between the speakers, arising due to different distances to the listener (for example, the front speakers are closer to the driver than the rear ones).
• 🎛️ Optimize the frequency response (amplitude-frequency response) to the acoustics interior, compensating for resonances at low frequencies and the “dullness” of high frequencies.
• 🚗 Create the effect of a “virtual center”when the sound seems to come not from the speakers, but from the center of the panel (useful for vocals and podcasts).
• 🔋 Save energy, preventing clipping (distortion) at peak loads, which is especially important for radios with a weak amplifier.

Unlike a conventional equalizer, which simply enhances or attenuates certain frequencies, ZX settings work at the level of time delays and phase correction. For example, if your car has full-range speakers in the front and a subwoofer in the rear, then without the ZX the bass will lag behind the mids, creating a washed-out sound effect. Correct setting synchronizes their work.

It is important to understand that ZX is not a universal solution. In cheap radios (for example, on a processor) this mode is often implemented in a simplified manner and can even worsen the sound if the parameters are not selected for specific acoustics. At the same time, in premium segment devices (for example No-Name on the processor RK3368) this mode is often implemented in a simplified manner and can even worsen the sound if the parameters are not selected for specific acoustics. At the same time, in premium segment devices (for example, Sony XAV-AX8000 or Pioneer AVH-Z9200DAB) ZX settings are integrated with a digital signal processor (DSP) and allow you to achieve studio quality.

Where to find ZX settings in the Android radio menu

Location of parameters ZX depends on the firmware and model of the device. In most cases, they can be found in one of the following paths:

• 📱 Settings → Sound → ZX Audio (standard path for firmware based on Android 10/11 from Malaysk or Dasaita).
• 🎵 Music → Equalizer → Advanced → ZX Mode (in radios with custom player, for example, Poweramp or Neutron).
• 🔧 Engineering menu → Audio Settings → ZX Configuration (hidden section, requires entering a code, for example, ##3646633##).

If your radio does not explicitly mention ZX, look for similar functions under other names:

Manufacturer	Alternative name ZX	Where to look
Pumpkin	Space Sound / 3D Audio	Settings → Sound → Effects
Xtrons	Time Alignment	Settings → DSP → Delay
Joying	Sound Stage	Music → Sound settings
Sony	DSEE / ClearAudio+	Settings → Sound → Enhancement

On some Chinese radios (for example, on a chip AllWinner T3), ZX settings can be hidden in the configuration file /system/etc/audio_effects.conf. To activate them, you will need to edit the file via Root Explorer or ADBWe do not recommend doing this without experience - incorrect edits. can lead to complete loss of sound.

Step-by-step setup of ZX for optimal sound

Before you start setting up, make sure that what:

Install all speakers in standard places (without offsets)

Check the polarity of the speaker connections (plus to plus, minus to minus)

Disable all additional sound effects (bass boost, 3D sound)

Close car windows and doors for an accurate acoustic assessment-->

Now let's move on to the process itself. We will look at a universal algorithm that is suitable for most radios. If your model has specific options, we will describe their settings separately.

1. Delay calibration (Time Alignment)

This is the most important stage, since it is determines how sound will be perceived in the interior space. The goal is to synchronize the time of arrival of the sound wave from all speakers to the ears of the driver (or front passenger).

Instructions:

1. In the menu ZX Settings find the section Delay or Time Alignment.
2. Select the listening position (usually Driver -driver).
3. Set delays for each speaker in milliseconds (ms) Typical values:
   • 🔊 Front left (driver): 0 ms (reference). dot).
   • 🔊 Front right: 0.3–0.7 ms (depending on the width of the cabin).
   • 🔊 Rear left: 2.0–3.5 ms.
   • 🔊 Rear right: 2.3–4.0 ms.
   • 🔊 Subwoofer: 5.0–8.0 ms (if installed back).

Turn on the test tone (usually Pink Noise) and adjust the delays so that the sound appears to be coming from the center of the panel.

How to calculate the delays accurately?

Formula: Latency (ms) = (Distance to speaker - Distance to reference point) / 0.343, where 0.343 is the speed of sound in m/ms.

Example: if the rear speaker is 1.2 m further reference, then the delay = (1.2 - 0) / 0.343 ≈ 3.5 ms.

2. Setting the equalizer in ZX mode

Unlike the standard equalizer, ZX-equalizer allows you to adjust the frequency response taking into account the acoustics of the cabin. It is important to avoid two extremes here:

• ❌ Excessive boost of low frequencies (below 80 Hz) - this leads to “mumbling” and overloading the speakers.
• ❌ Raising high frequencies (above 12 kHz) - in the car interior they are already amplified due to reflections from the glass.

Recommended settings for most cars:

Frequency (Hz)	Level (dB)	Note
60	+2	Slight rise for “warmth” of sound
120	0	Neutral (avoiding “mumbling”)
500	-1	Reduced to reduce the “cardboardiness” of vocals
3 kHz	+1	Boost to improve intelligibility
10 kHz	-2	Cut to reduce fatigue

After setting the equalizer, be sure to check the sound on different genres of music: from classical (where midrange frequencies are important) to electronics (where bass and treble are critical). If the sound seems “dirty” on some tracks, reduce the overall volume level by 2-3 dB - this will remove the load from the amplifier.

3. Phase Alignment

This option is not available in all radios, but if it is present, its adjustment can significantly improve the stereo effect. correction eliminates the phase difference between the left and right channels, which arises due to:

• 🔊 Different distances to the speakers.
• 🔊 Uneven sensitivity of the speakers.
• 🔊 Features of interior acoustics (for example, asymmetrical arrangement seats).

How to set up:

1. Turn on a monophonic signal (for example, the voice of a radio announcer).
2. In the menu ZX → Phase change the value from -180° to +180° in steps of 10°.
3. The optimal position is when the sound seems as “collected” as possible and comes from the center, and is not spread out across salon.

Typical mistakes when setting up the ZX and how to avoid them

Even experienced users often make mistakes that negate all efforts to optimize the sound. Here are the most common of them:

⚠️ Attention: If after setting up the ZX the sound becomes quieter or wheezing appears, immediately reset the settings to factory settings. This is a sign that the radio amplifier is operating at the power limit, and further experiments may damage it.

• 🔇 Ignoring interior acoustics. The settings that are ideal for Toyota Camryare not suitable for VAZ 2110 —each car has its own resonant frequency. Always test the sound on site, and do not copy presets from the Internet.
• 🔊 Excessive gain of the rear speakers. Many people mistakenly believe that “more bass in the back = better.” In fact, this creates an imbalance and tires the ear on long trips.
• 🎛️ Using ZX in conjunction with other effects. For example, simultaneously with 3D Surround or Bass Boost. This leads to overlapping processing and sound distortion.
• 🔋 Setting at maximum volume. All ZX adjustments should be made at 50-60% of the maximum. At full volume, the amplifier operates in a non-linear mode, and the correction will be inaccurate.

Another common problem is mismatch between the ZX settings and the physical location of the speakers. For example, if the radio indicates that the subwoofer is connected to the rear left channel, but in fact it is on the rear right channel, phase correction will not work correctly. Always check the connection diagram!

If after all the manipulations the sound is still not satisfactory, check:

• 🔌 The quality of the contacts in the speaker connectors (oxidation or poor soldering can cause distortion).
• 📶 Presence of interference from other electronic devices in the car (for example, from LED lamps or DVR).
• 🔄 Radio firmware version - in older versions (for example, Android 8.1), ZX settings often work incorrectly.

ZX settings for different types of acoustics

There are no universal ZX parameters - they depend on the configuration of the audio system. Below we provide recommendations for the most common circuits.

1. Standard system (4 speakers + subwoofer)

Typical configuration for most middle-class cars. The key task here is to synchronize the subwoofer with the front speakers so that the bass does not “lag behind.”

Recommended parameters:

• 🔊 Subwoofer delay: 6–8 ms (if it is installed in the trunk).
• 🔊 Crossover frequency for the subwoofer: 80–100 Hz.
• 🔊 Subwoofer phase: 0° or 180° (selected by ear).
• 🔊 Subwoofer level: -3 dB relative to the front speakers.

2. Component system (separate HF/MF/LF speakers)

In such systems (for example, Focal or Hertz) each speaker is responsible for its own range, and the ZX’s task is to ensure smooth transitions between them.

Setting features:

• 🔊 Delays for tweeters (HF) should be 0.2–0.5 ms less than for midbass (MF).
• 🔊 Crossovers between speakers are adjusted manually (for example, MF: 80–3000 Hz, HF: 3000–20000 Hz).
• 🔊 Phase correction is critical - even a small one phase mismatch between the HF and midrange leads to “dips” in the sound.

3. System without a subwoofer (full-range speakers)

If the car has wide-range speakers (for example, 6×9 inches), ZX settings should compensate for their weaknesses - usually this is a lack of bass and "blockage" of high frequencies.

Recommendations:

• 🔊 Increase the delay of the rear speakers to 4–5 ms —this will smooth out the difference in distance.
• 🔊 Raise frequencies 60–100 Hz by +3 dB to simulate bass.
• 🔊 Use the option Loudness (if available) - it automatically adjusts the frequency response at low volume.

How to reset ZX settings to factory settings

If after experiments the sound has become worse, or you want to start tuning from scratch, perform a reset. Methods depend on the radio model:

Method 1: Through the settings menu

1. Go to Settings → Sound → ZX Audio.
2. Find the option Reset or Restore to default.
3. Confirm reset (sometimes you need to enter a PIN code, for example 0000 or 1234).

Method 2: Through the engineering menu

If the standard reset does not work:

1. Enter the engineering menu code (for example, ##3646633##).
2. Go to section Audio → ZX Configuration.
3. Select Restore Default.
4. Reboot the radio (hold the power button 10 seconds).

Method 3: Complete reset of the radio

Use a last resort if other methods have not helped:

1. Go to Settings → System → Reset.
2. Select Reset all settings (do not confuse with Reset to factory settings —this will delete all your data!).
3. After a reboot, the ZX settings will return to default values.

⚠️ Attention: On some radios (for example Xtrons PB7868B) resetting ZX settings resets all sound profiles, including custom equalizer presets. Before resetting, take screenshots of the current settings.

Problems with ZX settings and their solutions

Even after proper setup, you may encounter problems. Let's look at the most common ones and how to fix them.

Problem	Possible cause	Solution
Sound disappears when turned on. ZX	Conflict with other audio effects	Disable all effects except ZX in the sound settings
Background noise (hissing) has appeared	The amplifier is working at the limit	Reduce the overall volume level by 10-15%
Bass became boomy	Incorrect subwoofer delay	Increase the subwoofer delay by 1-2 ms
The sound "floats" when moving	Vibrations affect the phase	Reduce the sensitivity of phase correction
On some tracks the sound is distorted	Too aggressive equalizer	Reset the equalizer settings in ZX mode

If the problem persists, try updating the firmware of the radio. Manufacturers' websites (for example, www.xtrons.com or www.pumpkinauto.com) often post patches that correct bugs in the radio. audio processing. Before updating, be sure to:

Download the firmware specifically for your model (check the serial number)

Connect the radio to charging (the battery should not discharge during the process)

Disconnect all USB devices except the flash drive with the firmware

Do not press any buttons during the update-->

If after the update the ZX settings disappeared from the menu, this means that in the new firmware version they were moved to another location or replaced with similar functionality (for example, DSP Manager).

FAQ: Frequently asked questions about ZX settings

Is it possible to configure the ZX without special equipment?

Yes, most parameters (delay, phase, equalizer) can be adjusted by ear using test tracks. However, for accurate calibration it is better to use a microphone and a spectrum analyzer app (for example, REW or AudioTool on). smartphone).

Why did the sound become quieter after setting up the ZX?

This is normal - during phase correction and equalization of delays, some of the signal energy is lost. Compensate for this by slightly increasing the overall volume level (no more than +3 dB), but do not raise individual frequencies on the equalizer.

Does ZX work with Bluetooth audio?

Depends on the radio. In most cases, ZX settings only apply to analog or USB audio. For Bluetooth, you may need to enable the option ZX for BT in the engineering menu (if it exists).

Is it possible to transfer ZX settings from one radio to another?

No, even if the models are identical. The sound is affected by interior acoustics, speaker placement, and amplifier characteristics. The settings will have to be made again.

What to do if the radio does not have ZX settings?

You can emulate some of the functions using applications like ViPER4Android or Wavelet. They allow you to adjust delays, phase and EQ at the system level. However, this will require root access.