The PAM8403 5V Two Channel Stereo Audio Amplifier Module uses the PAM8403 Class D amplifier chip to drive two independent speaker channels from a single 5V supply. It operates between 2.5V and 5.5V DC, with 5V recommended for full output. Efficiency sits at 87%, which means the pam8403 amplifier board runs cool enough without any heatsink under normal listening conditions. The board measures just 21 x 18 x 3mm — smaller than a postage stamp.
One trade-off worth knowing — Class D output on this board is filterless. Connecting long speaker wires can act as antennas and radiate EMI. Keep speaker leads short, ideally under 30cm. The non-obvious spec here is the -58dB power supply rejection ratio, which means even a noisy USB power bank will not introduce audible hum into audio output. S/N ratio of 80dB keeps background noise below perceptible levels at normal volume.
The pam8403 module is widely used by Indian makers for USB-powered desktop speakers, Raspberry Pi audio output stages, and Arduino music player projects. The 5v audio amplifier board needs no external components — just power, input signal, and two speakers. StemVolt provides this pam8403 amplifier board with trusted quality, ensuring reliable performance.
Related Product:
Rajesh Mundra –
Customer support was helpful
Manoj Nyati –
Neat packaging, COD availability, and Pan India delivery ensured a smooth purchasing experience.
Pankaj Patni –
Packed neatly and securely
Sunil Porwal –
Recieved from best store in Rajasthan. It is easy to integrate, low power consumption, and reliable operation made it ideal for STEM applications.
Anil Sarawagi –
Reliable store for electronics components
Vikas Baheti –
Great value for money
Sandeep Shringi –
Stereo amplifier module produced clear dual-channel audio with excellent performance for compact speaker projects.