Purchasing a modern multimedia system based on Android from the brand Teyes often becomes the first step to high-quality sound in a car, however, out of the box the audio picture is rarely ideal. Factory presets often boost the high frequencies to create the illusion of detail or overly boost the bass, which leads to rapid hearing fatigue on a long journey. Correct calibration of the audio path allows you to unlock the potential of even standard speakers, making vocals transparent, and low frequencies elastic and controlled.
In this article we will analyze in detail the process of setting up the built-in equalizer and system DSP (digital signal processing), which is available in models of the series CC2, CC3 i S-Pro. You'll learn how to compensate for interior acoustic deficiencies, correctly distribute frequencies between speakers and subwoofer, and avoid common mistakes that lead to distortion and wheezing. Proper setup will turn your trip into a real concert hall on wheels.
Audio settings interface and types of equalizers
The first thing the user encounters after installing the head unit is a variety of sound settings menus. Firmware Teyes usually contains two main correction tools: a classic graphic equalizer and an extended module DSP. They are accessed through the menu Sound settings or a special icon in the notification shade, where you can quickly switch between modes.
The classic equalizer is a set of sliders, each of which is responsible for a specific frequency range. The standard set includes 5, 7 or 10 bands, allowing you to adjust the signal from deep bass to high squeaks. This tool is intuitive and suitable for quickly adjusting the sound to the genre of music, without requiring deep knowledge in acoustics.
More advanced models are equipped with a full-fledged DSP processor, which gives access to time delays, crossovers and a parametric equalizer. Here you can not only raise or lower the frequency, but also precisely specify the center frequency, quality factor (bandwidth) and gain level. This flexibility is necessary for accurate scene and elimination of door resonances.
- 🎚️ Graphic equalizer - a simple tool with fixed frequency bands for quick correction.
- 🎛️ Parametric equalizer (in DSP) - allows you to precisely adjust the width and center of each frequency band.
- 🔊 Crossovers are filters that separate the signal between speakers, subwoofer and tweeters.
- ⏱️ Time delays are a function for equalizing the arrival time of sound from all speakers to the driver’s ears.
⚠️ Attention: Do not confuse balance and fader settings with equalizer. The balance distributes the volume between the left and right channels, and the fader distributes the volume between the front and rear speakers, but they do not affect the timbre of the sound.
Basic adjustment of frequency bands
You should start adjusting the sound by resetting all values to get rid of the influence of factory presets, which are often aggressive. Set all sliders to 0 dB or Flat, thereby creating a blank slate for experimentation. Only after this can you begin sequential correction of the ranges, moving from low frequencies to high ones.
The low frequency range (usually from 30 Hz to 100 Hz) is responsible for the density and impact of the bass. If your speakers are small (10-13 cm), you should not excessively raise frequencies below 60 Hz, as they will not be able to play them back, which will only lead to the diffuser moving without sound and possible wheezing. It is optimal to slightly raise the area around 80-100 Hz for the appearance of “meat” in the sound if there is no separate subwoofer.
Mid frequencies (from 250 Hz to 4 kHz) are the most important for the perception of vocals and basic instruments. This is where problems with the “buzzing” of doors or, conversely, with the telephone effect are often hidden. Carefully raising the 1-3 kHz region will add presence and clarity to voices, but too much in this range will make the sound harsh and tiring for the ear.
Recommended start for acoustics without a subwoofer:60 Hz: +2 dB
250 Hz: -1 dB (remove hum)
1 kHz: 0 dB
4 kHz: +3 dB (add air)
10 kHz: +2 dB
High frequencies (above 10 kHz) are responsible for airiness and detailed sound of cymbals and strings. Raising them makes the sound more open and spacious. However, be careful: setting values too high will result in hiss and hiss, especially with cheap tweeters. If the sound gets too bright, try lowering the top band slightly.
When adjusting the mids, use vocal tracks that you know by heart. This will help you hear even minimal changes in voice timbre and quickly find a comfortable position for the sliders.
Working with DSP: Crossovers and filtering
If your radio Teyes supports the mode DSP, you get a professional frequency separation tool in your hands. Crossovers allow you to cut off unwanted frequencies from specific speakers, protecting them from overload and improving the overall sound of the system. Without proper crossover settings, even expensive acoustics can sound worse than standard ones.
For the front speakers (midbass), a high-pass filter (HPFis usually installed). It cuts out deep bass that small door speakers can't play cleanly. Setting the cutoff at 63 Hz or 80 Hz will allow the speakers to operate in a comfortable range, increasing their volume without distortion and freeing up space for the subwoofer.
Tweeters (high-frequency speakers) must be driven through a high-pass filter with a higher threshold, usually from 3.15 kHz to 5 kHz. Submitting low frequencies to them is fatal: the diffuser will move too much, which will lead to mechanical damage or unpleasant rattling. In the menu DSP → Crossover select the filter type HPF and specify the desired cutoff frequency.
| Speaker type | Filter type | Cutoff frequency (Hz) | Slope |
|---|---|---|---|
| Subwoofer | LPF (Low Pass Filter) | 63 - 80 | 24 dB/oct |
| Midbass (doors) | HPF (high-pass filter) | 63 - 80 | 12 dB/oct |
| Tweeter (tweeter) | HPF (high-pass filter) | 3150 - 5000 | 24 dB/oct |
| Midrange | Band Pass | 250 - 3150 | 12 dB/oct |
The Slope setting determines how sharply the signal is cut off after the cutoff point. The value 12 dB/oct gives a smoother transition, which can be useful for midbass to preserve the naturalness of the lower mids. The value 24 dB/oct or 48 dB/oct provides tight cutoff, which is critical for protecting tweeters from low frequencies.
⚠️ Attention: The interface and available values in the DSP menu may differ depending on the Teyes firmware version (V1, V2, V3). If you do not find the settings you need, check the "About the system" section and, if necessary, update the software through the manufacturer's official website.
What is a phase and why do you need it?
The phase determines the direction of movement of the speaker cone at a particular moment in time. If the phase of the subwoofer and midbass do not match, they will cancel each other out at the junction of frequencies, and the bass will become sluggish. The DSP menu often has a "Phase" button (0 or 180 degrees) for the subwoofer - switch it and listen where the bass gets louder and clearer.
Time delay correction for scene building
One of the most powerful functions in the arsenal Teyes is the setting of time delays (Time Alignment). In a standard car, the driver sits asymmetrically: the left speaker is closer to the ear than the right. Because of this, the sound from the left door arrives faster, creating the illusion that the entire orchestra is playing from the left. Delays allow you to synchronize the arrival of sound from all sources.
The principle of operation is simple: we artificially delay the signal on the nearest speakers so that it arrives simultaneously with the signal from the farthest ones. First, you need to measure the distance from the center of each speaker to the driver's head (or the center of the cabin, if all passengers are listening). This data is entered into the menu DSP → Time correction.
Some firmware allows you to enter a distance in centimeters or inches, automatically calculating the delay in milliseconds. Others require you to manually enter the delay time. The calculation formula is simple: the difference in distances is divided by the speed of sound (approximately 343 m/s). For example, if the left speaker is 0.5 meters closer, the signal to it should be delayed by about 1.5 ms.
- 📏 Measure the distance from each speaker to the driver's ears using a tape measure.
- 🧮 Find the farthest speaker - for it the delay will be 0 ms.
- ⏳ Enter the calculated delay values for the remaining channels in the settings menu.
- 🎧 Check the result on the vocal track: the central image should “stick” to the dashboard in the center.
Correctly configured time delays create the effect of a “live performance”, when the vocalist appears to be standing directly in front of the windshield, and not on the side of the door.
Setting up a subwoofer and fighting humming
Connecting an active or passive subwoofer radically changes the perception of music, adding the very foundation that standard door speakers lack. In radio tape recorders Teyes the subwoofer setting is carried out both through a separate output (if there is an RCA) and through reassigning the rear channels to subwoofer mode. The main thing here is to find the crossover point.
The optimal cutoff frequency for a subwoofer is usually in the range of 60-80 Hz. If you set the cutoff too high (for example, 120 Hz), you will hear exactly where the subwoofer is coming from, which will ruin the integrity of the scene. If too low (40 Hz), there may be a frequency dip between the sub and midbass, and the sound will become dull.
A common problem is car panels humming at certain frequencies. This is a resonance that can be easily removed using a parametric equalizer. Turn on the music, find the frequency at which the door or plastic begins to rattle, and create a narrow notch filter at that point, lowering the volume by 3-6 dB. This will remove the unpleasant overtone without affecting the rest of the spectrum.
It is also important to adjust the volume level of the subwoofer relative to the main acoustics. It should not shout over the vocals, but only emphasize the rhythm. Visually, the subwoofer diffuser should not shake at medium volume - the movement should be confident, but controlled.
⚠️ Attention: When using the rear channels in subwoofer mode (via a high-level input or reassignment), make sure that the appropriate mode is selected in the menu
Factory settings → Amplifier typeotherwise there will be sound on the rear doors will disappear or be distorted.
Common mistakes and optimization tips
Even with a powerful processor under the hood, many users make typical mistakes that nullify all their efforts. The most common of these is an attempt to compensate for poor recording quality or cheap speakers with extreme frequency boosts. If the speakers wheeze when you raise the bass, no equalizer adjustment will help - you need to change the acoustics or lower the overall volume.
Another mistake is ignoring loudness compensation. This feature automatically boosts bass and treble at low volumes to compensate for human hearing. However, at high volumes it must be turned off, otherwise the sound will become overloaded. Check how this function works on your device and decide whether it needs to be turned on all the time.
Don't forget about the sound source. Setting the equalizer for MP3 low bitrate (128 kbps) does not make sense, as you will simply increase compression artifacts. To get high-quality results, use file formats FLAC, WAV or streaming services with high quality data transfer. The radio cannot create those frequencies that were cut out when encoding the track.
☑️ Final check of sound settings
In conclusion, it is worth noting that sound tuning is a creative and subjective process. Technical recommendations provide a basis, but the final decision should be based on your personal hearing and preferences. Spend time experimenting, save successful presets for different genres of music, and your system Teyes will be able to surprise you with sound quality comparable to expensive audio systems.
Why did the sound become quieter after tuning?
When using filters (crossovers) and cutting frequencies, the total signal energy decreases. Additionally, if you remove resonant frequencies or reduce bass that was previously clogging up the sound, subjective loudness may drop. Simply increase the overall volume of your head unit or amplifier.
How to save your equalizer settings?
In most versions of Teyes software, after setting the equalizer bands or DSP, you need to click the "Save" button or select a memory slot (User 1, User 2). If you simply exit the menu, the settings may be reset to factory settings. It is also recommended to take a screenshot of the settings on your phone.
Is it possible to configure the sound for the passenger, and not for the driver?
Yes, in the Time Alignment menu you can select the “Driver” or “All Passengers” (or “Center”) mode. In everyone mode, delays are calculated based on the center of the cabin, which gives a more uniform sound field for all occupants, but sacrifices the ideal stage for the driver.
What to do if the equalizer does not affect the sound?
Check whether the "Direct" or "Bypass" mode is activated in the DSP settings. Also make sure that you are in the equalizer settings menu, and not just browsing through the presets. In rare cases, resetting the sound settings to factory settings and rebooting the radio helps.
Do you need an external amplifier for good tuning?
The built-in Teyes amplifier (usually 4x45 W) is good enough for entry-level and working with standard acoustics. However, to realize the full potential of DSP, especially when working with active crossovers and a subwoofer, an external multi-channel amplifier will provide greater volume headroom, dynamics and control over the speakers.