Mini Class AB 5W Mono Audio Amplifier Board – 5V VS8871
Mini Class AB 5W Mono Audio Amplifier Board – 5V VS8871
Mini Class AB 5W Mono Audio Power Amplifier Board (5V)
Upgrade your DIY audio projects with this compact Class AB Digital Amplifier Board. Powered by the VS8871 chip, this SMD-packaged mono amplifier delivers up to 5W of clean audio output from a 5V supply — making it perfect for desktop speakers, computer audio systems, small radios, and custom electronics builds.
Whether you're a hobbyist, engineer, or electronics enthusiast, this tiny but powerful board is an excellent foundation for high-quality sound amplification in space-constrained applications.
Key Features
- Class AB Amplification: Balanced efficiency and audio fidelity for clear, low-distortion mono sound
- 5W Output Power: Suitable for small to medium speakers (3–5W dissipation range)
- Wide Supply Voltage: Operates on 2.5V–5.5V DC — USB-powered friendly at 5V
- Wide Operating Temperature: Rated from -40°C to 80°C for versatile deployment environments
- SMD Package: Ultra-compact surface-mount design for space-saving integration
- No High-Concern Chemicals: Safe construction materials with no restricted substances
- New Condition: Shipped brand new, ready for immediate use or integration
Specifications
| Model | 5128 / VS8871 SFT-MY28 |
| Amplifier Class | Class AB (Mono) |
| Output Power | 3–5W |
| Supply Voltage | 2.5V – 5.5V DC |
| Package Type | SMD |
| Operating Temperature | -40°C to 80°C |
| Application | Computer audio, DIY speakers, embedded audio systems |
| Quantity | 1 board per order |
| Condition | New |
| Country of Origin | Made in Mainland China |
What's in the Box?
- 1 × Mini Class AB 5W Mono Audio Amplifier Board (VS8871)
Great Pairings for Your DIY Project
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Frequently Asked Questions
Q: What chip does this Class AB audio amplifier board use?
A: This mini amplifier board is built around the VS8871 audio amplifier IC, a reliable SMD-package chip that delivers up to 5W mono output with Class AB efficiency. The model reference is SFT-MY28.
Q: Can I power this amplifier board directly from a USB port?
A: Yes! The board operates across a wide supply voltage range of 2.5V to 5.5V DC, which makes it fully compatible with standard 5V USB power sources. This makes it ideal for computer audio builds and portable DIY speaker projects.
Q: What kind of speaker can I connect to this 5W amplifier board?
A: This board is designed for mono speaker setups with an output power of 3–5W. It pairs well with small to medium full-range drivers commonly used in desktop speakers, computer audio systems, and custom enclosures. Always match the speaker's impedance and power rating to the board's output specifications for best results.
Q: Is this amplifier board suitable for beginners in electronics?
A: Yes, the compact SMD design makes it straightforward to integrate into DIY builds. Basic soldering skills and knowledge of audio signal routing are recommended. The board arrives ready to use — simply connect your power supply, audio input, and speaker output.