TPA3116D2 120W+120W Bluetooth Power Amplifier Board - Efficient Stereo

In this review of the TPA3116D2 120W+120W Bluetooth Power Amplifier Board the bottom line is straightforward: this compact board is for hobbyists and DIY audio builders who need a high-efficiency, class-D stereo amplifier with Bluetooth 4.0 for compact systems. The reviewer found the unit delivers clean, high-fidelity sound at room and moderate volumes while staying cool thanks to convection heatsinking, and the on-board CSR Bluetooth module makes wireless pairing simple for casual listening and project integration.

Key Features

• Digital amplification: The TPA3116D2 chip provides high efficiency and low idle loss, so more of the power supply is converted to audio output rather than heat.
• Bluetooth 4.0 module: Integrated CSR865/BTM835 Bluetooth offers convenient wireless streaming from phones or tablets without an external receiver.
• Wide voltage range: Compatible with DC 12-24V supplies which gives flexibility for car, desktop, or battery-powered setups.
• Protection circuits: Built-in overvoltage, undervoltage, overheat, DC detection and short circuit protections reduce risk when experimenting or connecting unfamiliar speakers.
• Practical layout: European 3P wiring terminals, mounted capacitances and a large heatsink-style chip make wiring and thermal performance straightforward in small enclosures.
• High output: Rated at 120W per channel it can drive bookshelf or small PA speakers in medium rooms when paired with appropriate power and speakers.

Who It's For

This board is best for electronics hobbyists, DIY audio builders and installers who want a compact stereo amplifier with built-in Bluetooth and protection circuits. It suits projects such as small home theater amplifiers, powered instrument practice rigs and custom desktop stereo systems where a simple DC supply and wired speaker connections are acceptable.

It is less suitable for listeners who expect finished consumer features like volume knobs, remote controls or enclosure-ready aesthetics; those users should look for a finished amplifier product. Also, for very high-volume professional PA use, a purpose-built amplifier with rack features and larger cooling may be a better fit.

Pros & Cons

Pros

• High efficiency from the TPA3116D2 chip keeps thermal output low and battery draw reasonable for a given power.
• On-board Bluetooth CSR module simplifies wireless streaming without extra hardware.
• Multiple built-in protections provide safer experimentation and peace of mind when wiring speakers.
• Compact footprint and standard terminal blocks make it easy to integrate into custom projects.

Cons

• No packaged enclosure, controls or front-panel connectivity are included, so some assembly and mounting skill is required.

Specifications

Model	XH-M548
Chip type	TPA3116D2
Bluetooth module	BTM835 / CSR8635 (Bluetooth 4.0)
Voltage	DC 12-24V
Output power	120W x 2 channels
Size	98 x 80 x 18mm
Efficiency	>90%

Our Verdict

The TPA3116D2 120W+120W amplifier board is a solid value for DIYers who want efficient stereo power with integrated Bluetooth and basic protection circuits. It delivers clean sound, high power for its size and easy wiring, making it a practical choice for compact custom audio builds when an enclosure and front-end controls are already part of the plan.

Frequently Asked Questions

What power supply do I need?
Use a stable DC 12-24V supply capable of delivering more than 3A; higher current is required at maximum output.

Does it include Bluetooth pairing indicators?
Yes, the board has a Bluetooth status indication light to show connection condition.

Is the amplifier protected against faults?
Yes, it includes overvoltage, undervoltage, overheat, DC detection and short circuit protection circuits.