Bluetooth power amplifier board TDA7850 four-channel multi-harmonic tuning pitch separation 4 * 50W
Name: Four-channel Bluetooth power amplifier board
Chip type: Class AB
Chip model: TDA7850
Power supply voltage: DC12-14.4V
Standby current: 150mA
Number of channels: stereo * 4
Output power: 50W * 2 + 50W * 2 (At 4Ω)
Signal to noise ratio: 88%
Size: 126 * 95 * 29mm
Net weight: 255g
Common problem:
Q1. The problem of Bluetooth connection failure.
A: The Bluetooth of the mobile phone is turned on but the Bluetooth of the power amplifier board cannot be found. It is not possible to change the mobile phone to test. There may be a problem with the Bluetooth module.
Q2. The mobile phone can be connected but the laptop or desktop computer cannot be connected.
A: If the mobile phone can connect and play music, it means that there is no problem with the Bluetooth amplifier board. It may be a problem with the Bluetooth driver of the computer. The version is too old or there are files missing. It is recommended to uninstall the first and then install the latest version of the driver.
Q3. When the volume is turned up, the sound is stuck, intermittently, and it can be played normally after the volume is turned down.
A1: Because the power of the power supply is too small, the total output power of this amplifier board is 200W. The recommended power supply voltage is 12V and the current is above 18A.
A2: If there is no problem with the power supply, it may be that the power of the speaker is too small. For example, a 20W output, but a 5W speaker is connected. If the volume is turned up, there will be a stuck phenomenon, and the speaker may burn out.
Packing List:
1Pcs
