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 2.5~5.5V Power: DC 1A (DC): 5V Output power: 3W + 3W (4 ohms) Signal to noise ratio: 90 dB Efficiency: >90% Color: Red Positioning hole size: Axis Spacing 20mm Positioning hole Aperture: 2mm Board Size: 24.4 × 15.4 × 3 mm Weight: 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