XY-AP50H 50W+50W HIFI Bluetooth 5.0 Wireless Audio TPA3116D2 Digital Power Amplifier Stereo board 50Wx2 Amp Amplificador USB AUX 3.5MM AP

1.Q:How to choose a power supply adapter?
   A: The power supply of the module is very critical. The user must pay enough attention to the power supply. Otherwise it may not work properly.
   The higher the voltage and the higher the current then the better the output power. It is better to connect 3~4in speaker if user only have 12V 1A power adapter. It is no problem to connect 8~10in speaker if user have a power adapter which more than 19V 5A.
   The sound will be distorted after increase volume if the voltage is too low.
   If the current is too small, the speaker cannot be driven to work, and the speaker will pull the voltage low, resulting in abnormal operation or poor sound quality.
   It is recommended to use 18V/19V/24V power supply with current more than 3A.
   Adjust the volume to the maximum may be distorted and affecting the sound quality if input low power adapter such as 9V/12V 1A/2A adapter.
 
2.Q:How to choose a speaker?
   A:Commonly used speakers are generally 4ohm~8ohm.The speaker no need distinguish between positive and negative polarity.
   It can also work properly if the speaker has low power such as 10W~30W. But it needs connect to low power adapter such as less than 15V to prevent damage to the speaker.
   User don't have to worry about the problem of the speaker damaged if connect to 50W~100W speaker.Module can connect 12V~24V.The higher the voltage selected, the greater the sound or power that can be output.
 
3.Q:How to choose audio input mode?
   A: AUX has a higher priority than Bluetooth. USB Audio need switch by APP.
 
4.Q:Why is the volume working normally when volume small, and there is turbidity after increase volume?
   A: Sound distortion.Please change the adapter power supply with higher voltage level.
 
5.Q:Why is the volume working normally when volume small, and there is stop after increase volume?
   A: The input power is insufficient.Please change the adapter power supply with higher voltage level.
        Power supply itself intermittent power-off protection.Please change a match power adapter.
        The power of the power supply is too large so please reduce the power of the input power.
        The power amplifier board is seriously heated resulting in trigger overheat protection.So please increase the radiator.