KNACRO TPA3116 Bluetooth 4 2 2 1 Subwoofer Amplifier Board DC12 24V High Power Bluetooth HIFI Audio Digital Amplifier Board 50W 50W 100W

Instructions for use: 1, connect the power supply default Bluetooth mode; 2, disconnect Bluetooth, press the power switch to switch to the audio input mode; 3, Bluetooth playback status, press the power switch to pause / play. Volume potentiometer left turn is to turn down the volume, turn right to turn up the volume, press the function switch. Function switch instructions: 1. Power on The default is Bluetooth mode. 2. Bluetooth disconnected state, long press switch can switch to audio input mode. 3. Bluetooth playback status, short press the switch to pause playback/start playback. 24V Power Adapter: https://www.amazon.com/dp/B076DCCDZD https://www.amazon.com/dp/B01J19G00E https://www.amazon.com/dp/B06Y1DTG35 Operating voltage range: DC 12-25V (current 3-4A above, if the power of the larger recommended 19-24V / 4-5A above); Audio input sensitivity: 500-800mV; Frequency response range: 20Hz-20KHz; Horn impedance: Left and right channel speakers: 3.5-8 ?, woofer impedance: 2-8 ?; Maximum output power: 50W (left channel) + 50W (right channel) + 100W (bass channel). Package Included: 1*TPA3116 2.1 Subwoofer Amplifier Board 1*PH2.0-3P single plug shielded wire About power selection: The use of DC power supply, positive and negative reverse protection, positive and negative reverse connected no power. The power supply must not be mistakenly connected to the horn's output connector. This can cause damage to the amplifier chip. The maximum working voltage is 25V (Note: The maximum working voltage of TPA3116 power amplifier chip is 26V, do not use more than 26V). If you use an ordinary AC transformer power supply, you must add rectifier filter before you can use it. (Note: The no-load voltage after rectification should not exceed 26V).