5PCS PAM8403 Super mini digital amplifier board 2 * 3W Class D digital amplifier board efficient 2.5 to 5V USB power supply

Description

Upgrade your DIY audio projects with the 5PCS PAM8403 Super Mini Digital Amplifier Board. This compact, high‑efficiency Class D amplifier delivers 2 × 3 W of clean, distortion‑free sound while running on a low‑voltage 2.5 V‑5 V USB power source. Perfect for portable speakers, Bluetooth boxes, hobbyist kits, and small‑room sound systems.

Key Highlights

• Compact 30 mm × 30 mm board – fits tight enclosures and portable projects.
• Dual‑channel output: 2 × 3 W RMS into 4 Ω speakers (up to 6 W total).
• Highly efficient Class D design – up to 90% power conversion, minimal heat.
• Wide USB power range: 2.5 V to 5 V, ideal for power banks, laptop USB ports, and battery packs.
• Built‑in protection: short‑circuit, over‑current, and thermal shutdown.
• Low‑noise PCB layout with premium SMD components for crystal‑clear audio.
• Includes 5 identical boards – great for bulk projects or resale.

Product Features

The PAM8403 chipset is renowned for its reliable performance in compact audio applications. Each board features:

• Stereo input via 3.5 mm jack or RCA connectors.
• Adjustable gain control via onboard potentiometer.
• LED power indicator for quick status checks.
• Zero‑bias output – no DC offset on speakers, protecting your drivers.

Compatibility & Applications

Designed to work seamlessly with a wide range of audio sources, including:

• Smartphone or tablet audio via USB‑OTG.
• MP3/MP4 players, Raspberry Pi, Arduino, and ESP32 projects.
• Bluetooth audio modules and DIY wireless speakers.
• Portable power banks and rechargeable Li‑ion/Li‑Po cells.

Easy Installation

Each board arrives with clearly labeled pins and a simple solder‑free header layout. Follow these quick steps to get started:

• Connect the 3.5 mm or RCA audio source to the INPUT terminals.
• Attach your 4 Ω speaker to each OUTPUT terminal.
• Plug a USB cable (2.5 V‑5 V) into the POWER port.
• Turn on the power – the LED lights up and audio playback begins instantly.

Why Choose This PAM8403 Amplifier Set?

Whether you’re building a custom Bluetooth speaker, upgrading a portable PA system, or stocking a hobbyist shop, this 5‑piece pack offers unmatched value, reliability, and performance. Enjoy crystal‑clear sound, low heat, and flexible power options—all in a super‑mini footprint.