PAM8403 Mini Stereo Audio Amplifier Board 2.5V–5.5V USB

PAM8403 Mini Stereo Audio Amplifier Board Module

Upgrade your audio projects with the PAM8403 Mini Power Amplifier Board Module — a compact, high-efficiency Class D stereo amplifier designed for makers, hobbyists, and electronics enthusiasts alike. Whether you're building a portable speaker, modding a game console, or prototyping a new device, this tiny but mighty board delivers crystal-clear, full-range stereo sound with minimal fuss.

Key Features

• Noise-Free Performance: Advanced noise suppression ensures crystal-clear audio output even when no input signal is present — no hiss, no hum, just clean sound.
• Dual-Channel Stereo Output: Delivers 3W + 3W of power from a standard 5V USB supply, capable of driving up to four 8-ohm speakers simultaneously for rich, immersive stereo sound.
• LC Filter-Free Design: Engineered to operate without an LC output filter, allowing direct power from a USB port or standard 5V supply — simplifying your setup and reducing component count.
• Double-Sided PCB Layout: A thoughtfully designed double-sided PCB ensures proper grounding, minimizes channel interference, and delivers cleaner, more reliable audio signals.
• Ultra-Compact Form Factor: At just 22 × 18 × 3 mm (0.86 × 0.70 × 0.12 in), this module integrates easily into virtually any digital device or DIY build without sacrificing performance.
• Wide Voltage Range: Compatible with power supplies from 2.5V to 5.5V, giving you flexibility across a broad range of projects and configurations.

Specifications

Compatible Applications

This amplifier module is ideal for a wide range of devices and DIY projects, including:

• Portable Bluetooth & desktop speakers
• LCD TVs and computer monitors
• Laptops and portable DVD players
• Game consoles and handheld devices
• Cell phones and speakerphone systems
• Arduino, Raspberry Pi, and other microcontroller projects

What's in the Box

• 1 × PAM8403 Super Mini Digital Stereo Amplifier Board

Important Notes

• Do not exceed 5.5V operating voltage.
• Ensure correct polarity when connecting power — do not reverse the positive and negative terminals.
• Slight color variation may occur due to monitor display differences.
• Allow ±1–2 cm measurement tolerance due to manual measurement.

Learn more: ENERGY STAR product efficiency guidance

Frequently Asked Questions

Q: What voltage does the PAM8403 amplifier board require?

A: The PAM8403 Mini Amplifier Board operates on a wide voltage range of 2.5V to 5.5V. It works perfectly with a standard 5V USB power supply, making it incredibly easy to power from a computer, USB charger, or power bank.

Q: How many speakers can the PAM8403 stereo amplifier module drive?

A: The PAM8403 board features dual stereo channels and can drive up to four 8-ohm speakers (two per channel), delivering up to 3W per channel at 5V for clear, energetic sound reproduction.

Q: Does this amplifier board need an LC filter?

A: No — the PAM8403 module uses an innovative LC filter-free design, which means you can connect it directly to a USB power source without additional filtering components. This simplifies wiring and reduces the overall part count in your project.

Q: Is the PAM8403 amplifier board suitable for Arduino or Raspberry Pi projects?

A: Absolutely. Its compact 22 × 18 × 3 mm size and low-voltage operation make it a perfect fit for Arduino, Raspberry Pi, and other microcontroller-based audio projects, portable speaker builds, and any DIY electronics application requiring stereo audio output.

Production & Packaging Notice

To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.