Vender TDA7850 4 x 50W Bluetooth Power Amplifier Board 4 Channel al mejor precio

1.The problem of Bluetooth connection failure:Answer: 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 test the mobile phone. Maybe there is a problem with the Bluetooth ule, you can contact customer service to deal with it. 2. The mobile phone can be connected but the laptop or desktop computer cannot be connected:Answer: If the mobile phone can connect and play music, it means there is no problem with the Bluetooth amplifier board. It could be a problem with the computer's Bluetooth driver. The version is too old or files are missing. It is recommended to uninstall and then install the latest version of the driver from the beginning. Product el: XH-A374 Type of function: Amplify audio Chip type: Class AB (A and B) Chip el: TDA7850 Supply voltage: DC12-14.4V Standby current: 150mA Number of channels: stereo * 2 + stereo * 2 Output Power: 50W * 2 + 50W * 2 (4Q) Signal to Noise Ratio: 88% Appearance size: 126 x 95 x 29mm Installation hole distance: 118 x 87mm Product weight: 255g The sound is fixed when the volume is turned up intermittently, and it can be played normally after the volume is turned down. Answer: One of the reasons: because the power of the power supply is too small, the total power of this power amplifier board is 200W. When selecting the power supply, the recommended voltage is 12V and the current is above 18A. The second reason: If the power supply is ok, it may be that the speaker power is too small, such as outputting 20W, but connecting a 5W speaker. When the volume is turned up, there will be a fixed phenomenon, and the speaker may be burnt. colour: black Material: ABS Package Contents: 1 * TDA7850 bluetooth power amplifier boardOnly the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.