PAM8403 Mini Stereo Audio Amplifier Module — 3W+3W, 5V
PAM8403 Mini Stereo Audio Amplifier Module 3W+3W, 5V
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PAM8403 Mini Stereo Audio Amplifier Module — 3W+3W, 5V, Class D
The PAM8403 mini stereo audio amplifier module delivers 3W+3W stereo output from a single 5V USB supply using the efficient Class D PAM8403 amplifier IC. With filterless output, low THD, and high efficiency (>85%), it is the ideal amplifier module for portable speaker projects, Arduino audio systems, and any application requiring compact stereo amplification from a 5V source.
The on-board volume potentiometer provides manual volume control, and the 3.5mm stereo input jack accepts audio from phones, computers, and Arduino DAC outputs. Powered directly from USB or any 5V supply — no external power supply required for most applications.
Key Specifications
- IC: PAM8403 | Class: Class D (filterless)
- Output power: 3W + 3W (stereo) at 4Ω load, 5V
- Supply voltage: 2.5V–5V DC | Efficiency: >85%
- THD: <0.1% at 1W | SNR: >80dB
- Input: 3.5mm stereo jack | Output: 2× speaker terminals
- Volume control: On-board potentiometer
- Compliance: RoHS
Why Choose PAM8403?
- ✅ 3W+3W stereo from 5V — USB-powered, no external power supply needed
- ✅ Class D efficiency (>85%) — minimal heat generation, ideal for battery-powered projects
- ✅ Filterless output — connect speakers directly without output filter inductors
- ✅ On-board volume pot — manual volume control without external components
- ✅ 3.5mm stereo input — connect any audio source directly
- ✅ Compact module — minimal footprint, easy to integrate into enclosures
Typical Applications
- Portable Bluetooth speaker builds
- Arduino audio output amplification
- DFPlayer Mini and MP3 module speaker driver
- Desktop mini speaker systems
- Raspberry Pi audio output amplification
- DIY stereo amplifier projects
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