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XH-M542 TDA3116D2 100W Mono Digital Power Amplifier Board DC12–26V | Class D Audio Amp Module
XH-M542 TDA3116D2 100W Mono Digital Power Amplifier Board DC12–26V | Class D Audio Amp Module
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XH-M542 TDA3116D2 100W Mono Class D Digital Power Amplifier Board
Build a powerful, efficient mono audio amplifier with the XH-M542 TDA3116D2 amplifier board. Based on the Texas Instruments TPA3116D2 (TDA3116D2) Class D amplifier IC, this compact 79×54mm module delivers up to 100W of mono output power from a wide DC 12–26V supply — making it ideal for DIY subwoofer amplifiers, powered speaker builds, and home audio system upgrades. Class D efficiency means minimal heat generation even at high output levels.
Specifications
| Model | XH-M542 |
| Amplifier IC | TDA3116D2 (TPA3116D2) |
| Amplifier Class | Class D (switching amplifier) |
| Output Configuration | Mono (single channel) |
| Max Output Power | 100W |
| Supply Voltage | DC 12V – 26V |
| Input Current | >3A recommended |
| Signal-to-Noise Ratio | 100dB |
| Channel | Mono track |
| PCB Dimensions | 79 × 54 × 16mm |
| Package | SMD |
| Origin | Mainland China |
Key Features
- ✅ TDA3116D2 (TPA3116D2) IC — proven Texas Instruments Class D amplifier with excellent audio performance
- ✅ 100W mono output — sufficient power for 4Ω or 8Ω subwoofers and full-range speakers
- ✅ Wide supply range DC12–26V — compatible with 12V car batteries, 19V laptop adapters, and 24V power supplies
- ✅ 100dB SNR — high signal-to-noise ratio for clean, low-noise audio reproduction
- ✅ Class D efficiency — >90% efficiency means minimal heat, no heatsink required at moderate power levels
- ✅ Compact 79×54mm PCB — fits easily into custom enclosures and speaker cabinets
- ✅ SMD construction — professional PCB layout for stable, low-noise operation
Common Applications
- DIY subwoofer amplifier builds (4Ω or 8Ω woofers)
- Powered bookshelf speaker projects
- Car audio amplifier (12V supply compatible)
- Home theater subwoofer channel amplification
- Bluetooth speaker amplifier module
- Raspberry Pi and Arduino audio output amplification
- Replacement amplifier board for damaged commercial speakers
Wiring Guide
- Power supply: Connect DC 12–26V to the VCC and GND terminals. Use a supply rated for >3A (5A+ recommended for full power).
- Audio input: Connect your audio source (phone, DAC, preamp) to the L/R input terminals or RCA input (if equipped). For mono use, bridge L and R inputs.
- Speaker output: Connect your 4Ω or 8Ω speaker to the speaker output terminals.
- Power on: Apply power. The board is ready to amplify immediately — no warm-up required.
- Volume control: Adjust input signal level from your source device or add an external potentiometer to the input for volume control.
Frequently Asked Questions
Q: Can I use this with a 12V car battery?
A: Yes. DC 12V is within the operating range. At 12V, output power will be lower than the 100W maximum (which requires 24–26V). Expect approximately 30–50W at 12V into a 4Ω load.
Q: Does this board include a volume control?
A: The XH-M542 board does not include an onboard volume potentiometer. Control volume from your source device or add an external 10kΩ potentiometer to the audio input.
Q: What speaker impedance is compatible?
A: The TDA3116D2 is rated for 4Ω to 8Ω loads. Do not connect speakers below 4Ω as this may damage the IC.
Package Contents
- 1× XH-M542 TDA3116D2 100W Mono Digital Power Amplifier Board
