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Product ViewDescription: The power supply of the digital power amplifier board is very important. The power supply is not enough. The actual limit output power of the board is 20W (10W for each left and right channel). The speaker is an inductive load. Please follow 5V-8V (to prevent If the power supply voltage is suddenly too high and the chip is burned out, please use a power supply of 5-8V as much as possible.) 2.5-3A power supply to the board, and the ripple of the power supply is small, and the dynamic current resistance is better. Do not use a power supply with short-circuit current protection. Many mobile phone chargers now support fast charging (the voltage is not fixed 5V, some 10V or even 12V will automatically change), it is strongly forofferden to use the mobile phone charger power supply to the board, when power is on, Do not touch the surface of the chip with your hands. The static electricity on the hand can easily damage the chip, causing the channel to break the sound and not working properly, or even burning the chip. As long as the power supply of the board is stable at 5V-8V (preferably 5-7.5V), the speaker is within 15 watts and the operation is very stable. The board has been added with a power indicator, and the onboard green indicator will light up after power up. At the same time, the power interface is a DC power socket, which is more convenient for direct access of the power supply. Board parameters: 1>.Power supply voltage: 5V-8V DC (recommended 5-7.5V) It is strongly recommended 2.5A-3A 2>.input audio: left and right channels stereo input 3>.output power: a total of 20 watts, left and right channels each 10 watts 4>.speaker requirements: 4 ohm-8 ohm speaker power 10 ~ 15W can push (the speaker's sensitivity is greater, the better the push, of course, the greater the power is not good push, if the speaker's sensitivity is high, you can use the maximum 30W Speaker)