XH-M542 TPA3116D2 Mono 100W Digital Audio Amplifier Board – DC 12V-26V Power Amp Module for DIY Speakers & Audio Projects

SKU: FA2019-8
Model

XH-M542
Core Chip

TPA3116D2 (Digital Class D)
Input Voltage

DC 12V – 26V (24V recommended for maximum power)
Output Power

100W Max (at 24V DC / 2Ω load or 4Ω load)
Signal-to-Noise Ratio (SNR)

100dB
Channel Type

Mono (Single Channel)
Frequency Response

20Hz – 20kHz
Output Impedance Support

2Ω to 8Ω (Best performance at 4Ω)
Dimensions

79mm x 54mm x 16mm
Weight

Approx. 54g
The XH-M542 TPA3116D2 Mono 100W Digital Audio Amplifier Board is a high-power, high-efficiency Class D audio power amplifier designed for audiophiles, DIY hobbyists, and industrial audio integration. Built around the world-renowned TPA3116D2 high-performance core chip, this module delivers a clean, punchy 100W output from a single channel (Mono).
Its advanced digital architecture ensures over 90% power efficiency, allowing it to provide massive volume with minimal heat generation. The board is equipped with an integrated large-area heatsink and high-grade electrolytic capacitors to ensure stable performance even during continuous high-load operation. Whether you are building a custom subwoofer, a portable PA system, or an active mono speaker, the XH-M542 provides the reliability and acoustic clarity required for professional results.
Key Features
  • High Power Output: Delivers up to 100W of crisp audio, making it powerful enough to drive large floor-standing speakers or subwoofers.
  • Superior Efficiency: Class D technology operates at >90% efficiency, reducing the need for massive cooling systems and extending battery life in portable applications.
  • Advanced Protection Suite: Includes comprehensive onboard protection against over-voltage, under-voltage, overheating, DC detection, and short circuits.
  • Low Noise Floor: High-quality inductor coils and filtering capacitors minimize electromagnetic interference (EMI) and background hiss.
  • Wide Voltage Range: Compatible with any DC power source between 12V and 26V, offering great flexibility for different power supply setups.
  • Compact Industrial Build: Features a reinforced PCB with pre-drilled mounting holes for easy installation into custom enclosures or speaker cabinets.
Usage Guidelines
  1. Power Connection: Connect a DC power supply to the VCC (+) and GND (-) terminals. Ensure the voltage is within the 12V-26V range.
  2. Audio Input: Connect your audio source (Phone, PC, MP3 Player, or Pre-amp) to the 3-pin input header. For mono signals, use the signal and ground pins.
  3. Speaker Connection: Connect your speaker wires to the output terminals. Ensure the speaker’s impedance is between 2Ω and 8Ω.
  4. Heat Management: While the board includes a heatsink, ensure the enclosure has adequate ventilation if running at maximum power for extended periods.
  5. Pro-Tip: Using a high-quality 24V 5A power supply will yield the best bass response and highest volume stability.
Q: Can I use this board for a Stereo (2-channel) setup?

This is a Mono board. For a stereo setup, you will need two of these modules (one for the Left channel and one for the Right channel) or a dedicated Stereo TPA3116D2 board.

Q: What power supply is recommended for the best performance?

For maximum 100W output, a 24V DC supply with at least 5A is recommended. Using a 12V supply will work but will limit the maximum output power to approximately 30-40W.

Q: Does this board require an external volume control?

The XH-M542 does not have an onboard volume knob. Volume should be controlled via the input source (e.g., your smartphone or PC) or by adding a 10K/50K potentiometer to the audio input line.

Q: Is it safe to drive a 2-ohm speaker?

Yes, the TPA3116D2 is stable at 2Ω. However, please ensure your power supply can provide sufficient current and that the heatsink is well-ventilated, as the chip will generate more heat at lower impedances.

Q: Why is there a "pop" sound when I turn the power on?

Small “pop” sounds are common in some Class D amps without a delay circuit. To minimize this, ensure your audio source is turned on before the amplifier or use a power supply with a soft-start feature.

Q: Can this be used for business/commercial audio installations?

Absolutely. Business purchasers frequently use the XH-M542 for background music in retail spaces, DIY kiosks, and paging systems due to its high reliability and ability to run for long durations without overheating.

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