Product name: Bluetooth-compatible-compatible audio amplifier board

Product model: XH-A354

Function type: Amplify audio

Chip model: YDA138-E*2

Bluetooth-compatible-compatible version: 5.0

Power supply voltage: DC12V 4A

Standby current: 80mA

Output channel: two-channel stereo

Output power: 2*20w (4Ω)

Signal to noise ratio: 88%

Product size: 89*62*17mm

Installation size: 82*55mm

Installation aperture: 3mm

Common Problem

1. About the length of Bluetooth-compatible-compatible connection.

Answer: After testing, the connection distance of different mobile phones is different. The Bluetooth-compatible-compatible connection distance of OPPOR9m we tested is only 2-3 meters; while the Bluetooth-compatible-compatible connection distance of Honor and Apple mobile phones can reach more than 20 meters.

2. When the volume is turned up, the sound will be stuck, intermittently, and it can be played normally after the volume is turned down.

answer:

Reason 1: due to the low power of the power supply, the total output power of this Bluetooth-compatible-compatible power amplifier board is 4oW. The recommended voltage for power supply selection is 12V and the current is above 4A.

Reason 2: If the power supply is ok, it may be that the power of the speaker is too low. For example, if the output is 20W, but a 5W speaker is connected, and the volume is turned on, there will be a stutter phenomenon, and the speaker may be burned out.

3. There is too much noise when playing music, or there is a bottom noise when no music is played.

Answer: The function of the power amplifier board is to amplify the signal. The main source of noise is that the radio clutter in the environment is amplified by the power amplifier board, so as long as it is the power amplifier board, there will be noise. Therefore, try to use the audio cable with shielding function. It is also possible that the sound source is noisy, which is not found in normal mobile phones and MP3s. Most of them are on some old front-end boards and are not compatible with our company's power amplifier boards. You can add audio isolators or whether the coupling capacitors can be removed.

4. The problem of not being able to connect to Bluetooth-compatible-compatible.

Answer: The Bluetooth-compatible-compatible indicator light flashes regularly when it is working normally. If it stays on or does not light up, there may be a problem with the Bluetooth-compatible-compatible module. You can contact customer service to deal with it.

5. The mobile phone can be connected but the laptop or desktop computer cannot be connected.

Answer: If the phone can connect and play music, it means that there is no problem with the Bluetooth-compatible-compatible power amplifier board. There may be a problem with the computer's Bluetooth-compatible-compatible driver, the version is too old or there are files missing. It is recommended to uninstall and then install the latest version of the driver.