Overview: The PAM8406 5W+5W Class D Stereo Audio Amplifier Board is a compact, high-efficiency audio solution designed for small-scale audio amplification in portable speakers, DIY projects, and multimedia devices. Featuring the PAM8406 IC, this module delivers clear stereo sound with a combined output of 10W (5W per channel) at 5V, making it ideal for driving 4Ω or 8Ω speakers. With an integrated volume control knob and a sleek black PCB design, it’s perfect for hobbyists, educators, and audio enthusiasts looking for an easy-to-use amplification solution.
Key Specifications:
Parameter
Value/Detail
IC Chip
PAM8406 (Class D)
Output Power
2x5W (at 5V/4Ω, THD+N <10%) 2x3W (at 5V/8Ω)
Input Voltage Range
2.5V – 5.5V DC (recommended 5V)
Input Sensitivity
0.4V RMS (for full output)
Frequency Response
20Hz – 20kHz (±1dB)
Total Harmonic Distortion (THD)
<0.1% (1W/1kHz)
Signal-to-Noise Ratio (SNR)
>90dB (A-weighted)
Efficiency
Up to 90%
Speaker Impedance
4Ω – 8Ω
Dimensions
Approx. 48mm x 23mm x 15mm
Weight
~10g
Operating Temperature
-20°C to +70°C
Connections:
Power Input (VCC/GND): 2.54mm pin header or DC jack for 2.5V-5.5V supply (positive to VCC, ground to GND).
Audio Input (L/R): 3.5mm stereo jack for left and right channel input from devices like phones or MP3 players.
Speaker Outputs (L+/L–, R+/R–): 3-pin screw terminal for connecting 4-8Ω speakers (polarity matters).
Volume Control: Onboard rotary potentiometer with knob for adjustable audio level.
Features and Benefits:
High Efficiency: Class D architecture minimizes power consumption, ideal for battery-powered applications like portable speakers or Raspberry Pi projects.
Clear Sound Quality: Low distortion and high SNR ensure crisp audio for music, podcasts, or gaming.
Adjustable Volume: Integrated knob allows real-time sound level adjustment without external controls.
Compact and Durable: Black PCB with gold-plated contacts and a large electrolytic capacitor for stable power delivery; fits easily into small enclosures.
Built-in Protection: Includes over-temperature and short-circuit protection for safe operation.
No External Components Needed: Fully assembled with onboard filtering for plug-and-play use.
Applications:
Portable Bluetooth speakers and MP3 players.
DIY audio projects and educational kits.
Small home theater systems or PC audio boosts.
Arduino or microcontroller-based sound setups.
Battery-powered gadgets and toys.
Note: Use a stable 5V power supply (e.g., USB or Li-Po battery) within the rated range to avoid damage. Test speaker connections with a multimeter for correct polarity.
