XH-A374 50Wx4 4 Channel TDA7850 bluetooth 4.0 Channel HIFI Auido Power Amplifier Class-AB Four Channels Amplifier Board

Specifications Power amplifier chip TDA7850 Chip type Class ABWorking voltage DC 12 14 4V Standby current Number of channels 4 channels Stereo 2 stereo 2 Output power 50W 2 50W 2 4ohm Signal to noise ratio 88 Size 126 x 95 x 29 mmInstallation hole distance 118x87 mmQA 1 Bluetooth connection problem Answer The Bluetooth indicator flashes regularly when it is working normally If it is on or off it may be a problem with the Bluetooth module You can contact customer service to handle it 2 The mobile phone can be connected but the laptop or desktop 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 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 and then install the latest version of the driver 3 When the volume is turned up the sound appears to be stuck intermittently and can be played for a long time after the volume is turned down Answer Reason one Because the power of the power supply is too small the total output power of this power amplifier board is 200W The recommended voltage for power supply selection is 12V and the current is above 18A Reason 2 If the power supply is okay it may be that the power of the speaker is too small such as outputting 200W but connecting a 5W speaker When the volume is turned up there will be a stuck phenomenon and the speake