HALJIA 2PCS 2-Channel 3W PAM8403 Audio Amplifier Board DIY Electronic Components Control Module Red

Premium 2-Channel 3W PAM8403 Audio Amplifier Board. CMOS BTL output controller. Output power: 3W + 3W (at 4ohm). The board can be powered by 5V USB power adapter or 4 x 1.5 V batteries. No component parameters are changed to protect IC. It is perfect for MP3/MP4/notebook. Product specifications:Voltage: DC 2.5~5.5VPower: DC 1A (DC): 5VOutput power: 3W + 3W (4 ohms) Signal to noise ratio: 90 dB Efficiency: >90%Color: Red Positioning hole size: Axis Spacing 20mm Positioning hole Aperture: 2mmBoard Size: 24.4 × 15.4 × 3 mmWeight: 1.3g Precautions:1: The positive and negative poles of the power supply cannot be reversed, and the power supply voltage cannot exceed 5.5V. These two violations will cause the IC to be damaged.2: There is a high gain buffer on the chip. It is not possible to change any component parameters on the board. Non-conforming parameters will cause IC damage.3: Please use the shielded wire as much as possible for the input line, which can play an anti-interference effect and eliminate the clutter current.4: The output is the BTL driving mode of the CMOS tube. The negative poles of the left and right speakers cannot be connected together, that is, the 4 lines connecting the horns are completely independent, and are not allowed to be connected together!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 +/-1-3 cm.Packing List:2 x PAM8403 Audio amplifier board