HKD PAM8403 2x3W Mini Digital Audio Amplifier Board Class D

The HKD PAM8403 Audio Amplifier Module is a compact, energy-efficient Class D digital amplifier that delivers clear stereo sound in a super-mini form factor. Capable of providing 3W per channel (2×3W) at 4 with a 5V power supply, it is perfect for portable speaker systems, DIY audio projects, and USB-powered applications.

Unlike traditional Class A/B amplifiers, the Class D PAM8403 achieves up to 90% efficiency, eliminating the need for bulky heat sinks and saving space. It features built-in short-circuit and over-temperature protection for safe operation, along with a noise-canceling circuit that ensures clean sound without "pop" noise during power on/off.

This ultra-small amplifier can be powered by a standard 5V battery or USB port, making it ideal for compact, low-power audio designs.

Features:

• Class D digital amplifier with high efficiency (~90%).
• Provides 2×3W stereo output at 4 , 5V supply.
• No heat sink required - compact and lightweight.
• Built-in short-circuit and over-temperature protection.
• Noise-canceling circuit eliminates power-on/off pop noise.
• Can be powered by USB port or 5V battery.
• Ideal for portable speakers, DIY audio, and embedded sound systems.

Specifications:

• Chipset: PAM8403 Class D
• Input Voltage: 2.5-5V DC (max 5.5V)
• Output Power: 2 × 3W @ 4 , 5V supply
• Speaker Support: 4 or 8 (recommended: 4 )
• Efficiency: Up to 90%
• Protection: Short-circuit, over-temperature
• Noise Control: Built-in pop-noise suppression
• Module Size: 1.85 × 2.15 cm
• Net Weight: ~1g
• Applications: Portable speakers, DIY audio projects, USB-powered sound systems

The HKD PAM8403 Mini Digital Amplifier Module combines excellent audio performance with compact design, making it the perfect choice for small yet powerful sound applications.

What's in the box
1 x HKD PAM8403 2x3W Mini Digital Audio Amplifier Board Class D