Note:

When the audio signal input is large enough and the power supply voltage / current is large enough, there will be enough output power!
The higher the power supply voltage, the greater the output power, the smaller the speaker impedance, and the greater the output power!
Please ensure that the power of the adaptive power supply is greater than the actual working power of the power amplifier!

FAQ:

1. How to choose a power supply?

The power supply with the board is very important. The ripple of the selected power supply must be small. A power supply with a large ripple will cause the bottom noise of the power amplifier board to become larger and there will be current noise. The higher the voltage, the greater the current, and the more adequate the output power.

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 sub woofer speaker cannot be connected to an ordinary speaker, and a speaker with a sub woofer speaker must be connected with a power between 20-100. The dive frequency of the sub woofer speaker must be at least 50 Hz.

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.

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 sub woofer.

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

The R&L CHANNEL—BASS knob controls the bass, right-turning bass enhancement, left-turning bass attenuation. When the knob is in the rightmost position, the bass is neither enhanced nor attenuated.

6. How to adjust the sub woofer?

SUB WOOFER—VOLUME knob is used to control the volume of the sub woofer. Right-handed volume increases, and left-handed volume decreases.

The SUB WOOFER—FREQ knob controls the cutoff frequency of the sub woofer. The right-hand frequency increases, and the left-hand frequency decreases. The frequency adjustment range is 20 HZ – 200 HZ.

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, the power supply itself is protected against intermittent power failure.