TDA7492P Bluetooth V2.1 Audio Power Amplifier Board 2x25W - Compact

Our review of the TDA7492P Bluetooth V2.1 Audio Power Amplifier Board finds it to be a practical, compact solution for hobbyists and DIY audio projects who need reliable stereo power without a large chassis. The board delivers a clear, muscular 25W+25W output per channel using the TDA7492P chip and includes a Bluetooth V2.1 receiver plus an AUX interface for wired sources, making it easy to add wireless streaming to bookshelf speakers or custom enclosures. It is best for users comfortable wiring and mounting a bare board rather than those seeking a finished consumer product.

Key Features

• Dual 25W Outputs: Provides reliable stereo power of 25W+25W for small to medium speakers, suitable for most home desktop and bookshelf setups.
• Bluetooth V2.1 Receiver: Built-in wireless input lets you stream from phones and tablets without an external adapter.
• AUX Interface: A dedicated wired audio input gives a low-latency option for TVs, PCs, or line-level sources.
• Reverse-Connection Protection: The board includes protection to tolerate incorrect power polarity and can help extend component life during installation mistakes.
• Quality PCB and Components: Uses higher-grade electronic parts and a military-grade style PCB to improve durability and thermal stability in compact builds.
• Wide Speaker Compatibility: Supports 4, 6, 8 and 16 ohm speakers, with 8 ohm load being the optimal match for consistent performance.

Who It's For

This board is aimed at DIY audio builders, makers and installers who want a compact stereo amplifier board to add Bluetooth streaming and 2x25W power to custom speaker cabinets, desktop audio rigs, or small home theater projects. It is convenient for hobbyists who can provide their own power supply, enclosure and wiring.

It is not ideal for users expecting a finished commercial amplifier with knobs, remote or built-in speaker terminals; those buyers should look for a packaged amplifier or powered speaker solution instead. Also, people who need the latest Bluetooth codecs or higher-power outputs should consider other options.

Pros & Cons

Pros

• Compact size and 2x25W output make it simple to integrate into small projects.
• Bluetooth V2.1 and AUX inputs cover both wireless and wired sources for flexibility.
• Reverse-connection protection and quality PCB parts improve reliability during installation.

Cons

• Bluetooth V2.1 is an older version and lacks modern codec support and range improvements.
• As a bare board, it requires an external power supply and enclosure, which adds to project complexity.

Specifications

Our Verdict

The TDA7492P Bluetooth V2.1 board is a strong value for DIYers who need a compact 2x25W amplifier with both Bluetooth and AUX inputs and durable PCB construction. It is especially useful for small speaker projects and desktop systems where a simple, reliable amp board is required, but those wanting a turnkey consumer amplifier or modern Bluetooth features should consider alternatives.

Frequently Asked Questions

Does this board need an external power supply?
The board requires a DC 10-25V power supply connected to the 2.1mm socket; the supply is not included.

Can it drive 8 ohm bookshelf speakers?
Yes, it supports 8 ohm speakers and 8 ohm is the recommended load for balanced performance at 25W per channel.

Is the Bluetooth module modern and lossless?
No, the included Bluetooth is V2.1, which provides basic wireless streaming but lacks newer codecs and advanced range found in recent Bluetooth versions.