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#wuzhiaudio Bluetooth 5.0 50WX2+100W 2.1 Channel Amplifier Board , Review & Sound Test



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#wuzhiaudio ZK-MT21 Bluetooth 5.0 50WX2+100W 2.1 Channel Amplifier Board , Review & Sound Test
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SUBWOOFER—VOLUME knob is used to control the volume of the subwoofer. Right-handed volume increases, and left-handed volume decreases.

The SUBWOOFER—FREQ knob controls the cutoff frequency of the subwoofer. The right-hand frequency increases, and the left-hand frequency decreases. The frequency adjustment range is 20HZ-200HZ.
8. The sound is small, but when the sound becomes louder, the sound freezes?

If the input power is insufficient,

9. What factors are related to the sound quality?

The sound quality is not only related to the power amplifier module, but also related to the power supply, sound source, and the entire audio system.

It is recommended to use a power supply of 18V19V24V with a current above 5A. If you only have 9V12V or 1A 2A power supply, it can be used but the power is low. When the volume is selected close to the maximum, it may be distorted and affect the sound quality.

2. How to choose a speaker?

Regarding speaker types: commonly used speakers are generally 4-8 ohms, which can be used. The left and right channel speakers need to be connected to full-range speakers or mid- to high-frequency speakers, and the power is between 20W-100W. The subwoofer speaker cannot be connected to an ordinary speaker, and a speaker with a subwoofer speaker must be connected with a power between 20-100. The dive frequency of the subwoofer speaker must be at least 50 Hz.
If you are a 50W-100W speaker, don't worry about the problem of speaker burnout. You can choose a 12-24V power supply. The higher the selected voltage, the greater the sound or power that can be output. The speaker power should not exceed 100W, otherwise it will affect the sound quality.

3. Introduction to audio input mode

This audio power amplifier module has two audio input methods: one is Bluetooth input, the other is AUX input, Bluetooth mode is preferred. Bluetooth can be connected in any mode. As long as the Bluetooth connection is successful, it is in Bluetooth mode, and the Bluetooth mode supports automatic connection back. When Bluetooth is not connected, AUX plug-in is in AUX mode. It should be note that when using AUX mode, you need to confirm that the Bluetooth connection of this module has been disconnected.

4. How to adjust the main volume?

The MAIN—VOLUME knob adjusts the main volume. Right-handed main volume increases, left-handed main volume decreases. The main volume affects the volume of the left and right channels and the subwoofer.

5. How to adjust the left and right channel high and low sounds

6. How to adjust the subwoofer?

SUBWOOFER—VOLUME knob is used to control the volume of the subwoofer. Right-handed volume increases, and left-handed volume decreases.

The SUBWOOFER—FREQ knob controls the cutoff frequency of the subwoofer. The right-hand frequency increases, and the left-hand frequency decreases. The frequency adjustment range is 20HZ-200HZ.



7. The voice is small and okay. When the voice becomes louder, the voice becomes muddy?

The sound is distorted, please turn down the total volume or change to a higher voltage adapter power supply.



8. The sound is small, but when the sound becomes louder, the sound freezes?

If the input power is insufficient.



9. What factors are related to the sound quality?

The sound quality is not only related to the power amplifier module, but also related to the power supply, sound source, and the entire audio system.
Category
Audio
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