TPA3116D2 Stereo Amplifier Module – 2x50W Bluetooth 5.0 Hi-Fi Sound for Any DIY Audio Project
Looking to build your own custom Bluetooth speaker or breathe new life into vintage passive speakers? Featuring the high-performance TPA3116D2 chip from Texas Instruments and reliable Bluetooth 5.0 connectivity, this module delivers everything you need: genuine power, crystal-clear audio, and seamless wireless streaming. No compromises, no hassle.
Note: Maximum 2x50W output is achieved using a 24V / 3A (minimum) power supply. For intensive, long-term use, we recommend attaching a heatsink to the chip.
Why choose this module? (Key Advantages):
- Total Harmonic Distortion (THD) under 0.1% — enjoy faithful, high-fidelity sound even at high volumes, free from crackling or unwanted colouration.
- Bluetooth 5.0 with 15m range — move freely around the room without losing your connection, compatible with any smartphone or laptop.
- Dual audio input — switch between Bluetooth and the 3.5mm jack seamlessly; the wired connection takes automatic priority.
- Class D efficiency over 87% — generates significantly less heat than traditional Class AB amplifiers, ensuring longer life without the need for forced cooling.
- Compatible with 4–8Ω / 50–200W speakers — works perfectly with a wide range of DIY or commercial passive speakers without modifications.
- Integrated volume/power knob — control your volume and power the module on or off with a single, intuitive dial.
- PWM up to 1.2 MHz — high switching frequency eliminates audible interference and simplifies output filtering.
Performance and Technical Details
The TPA3116D2 chip operates in Class D, boasting an architecture that converts over 87% of consumed energy directly into sound rather than wasted heat. The PWM modulation frequency of up to 1.2 MHz keeps interference well outside the audible range and reduces output filter requirements. The result is dynamic, clear, and artifact-free audio.
Bluetooth 5.0 connectivity maintains a stable link up to 15 metres away with no perceptible latency. When you prefer a wired connection, simply plug into the 3.5mm jack — the module will switch inputs automatically. Power is supplied via a standard 5.5×2.1mm DC jack, compatible with most laboratory power supplies or standard mains adapters.
| Parameter | Value / Detail |
|---|---|
| Amplifier Chip | TPA3116D2 (Texas Instruments) |
| Amplifier Class | Class D |
| Output Power | 2x50W (Stereo) |
| Total Harmonic Distortion (THD) | Under 0.1% |
| Speaker Impedance | 4 – 8 Ohms |
| Compatible Speaker Power | 50W – 200W |
| Bluetooth Version | 5.0 |
| Bluetooth Range | Up to 15 metres |
| Audio Inputs | Bluetooth 5.0 + 3.5mm Jack |
| Volume Control | Potentiometer with integrated power switch |
| PWM Frequency | Up to 1.2 MHz |
| Supply Voltage | 18V – 24V DC |
| Recommended Minimum Current | Above 3A |
| Power Connector | 5.5×2.1mm DC Jack |
Package Contents
- 1x 2x50W TPA3116D2 Stereo Bluetooth Audio Amplifier Module
Frequently Asked Questions
What speakers can I connect to this module?
Any passive speaker with an impedance between 4 and 8 Ohms and a nominal power rating of 50W–200W. This module is not compatible with active speakers or headphones.
What power supply do I need?
A regulated 18V–24V DC power supply with at least 3A. For maximum power output, a 24V/5A supply is the ideal choice. The connector is a standard 5.5×2.1mm barrel jack.
Can I use Bluetooth and the 3.5mm jack at the same time?
No. The module accepts only one audio source at a time. When you plug in a 3.5mm cable, it automatically takes priority over the Bluetooth connection.
Do I need a heatsink?
At moderate volumes, the module operates fine without a heatsink. If you plan to use it at maximum power for extended periods, we recommend attaching an aluminium heatsink to the TPA3116D2 chip to extend its lifespan and prevent thermal shutdown.
Is this suitable for DIY projects?
Yes, it is designed specifically for that purpose. Whether you are building home audio systems, portable Bluetooth speakers, or custom amplifier stations, its compact size and dual connectivity make it perfect for any DIY audio project.
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