ZK-ST21 2.1 Channel Bluetooth Amplifier Board 100W+100W+200W Subwoofer TPA3221 Support Bluetooth AUX U Disk Sound Card

Features 1 Adopting high power digital power amplifier specific inductance high current low magnetic loss low heat generation using oxygen free copper wire to improve sound quality and magnetic shielding mechanism to resist electromagnetic interference 2 Equipped with two TPA3221 chips it supports 2 1 channel Bluetooth digital amplifier 100W 100W 200W high power 3 Subwoofer expansion port supporting the installation of 1602 and 3002 4 Multiple expansion ports capable of connecting to microphone front stage board reverb input or output convenient to use 5 Equipped with protection mechanism input undervoltage input anti reverse connection overheating overcurrent and short circuit protection Parameter Product name 2 1 channel BT amplifier board 100W 100W 200WProduct model ZK ST21Adapted power supply The working voltage range is 12 30VDC and it is recommended to use a DC power supply with a voltage of 24V 28V and a current of 10A or above Maximum power left or right channel 105W 30V 4 Ω 55W 30V 8 Ω Subwoofer 208W 30V 2 Ω 105W 30V 4 Ω In short the higher the voltage the smaller the resistance and the greater the output power Adapted speakers left and right channels supporting speakers up to 3 8 Ω and 100W The subwoofer supports speakers up to 2 8 Ω and 200W BT chip JieLi 5 1 transmission distance of 15 metersInput method BT AUX USB drive sound cardNumber of channels 2 1 left channel right channel subwooferPower amplifier chip Two T