XH-M189 2×50W High-End Digital Stereo Amplifier Board – TPA3116D2 Class D Dual-Channel, 24V DC Power (Hi-Fi Audio DIY)

SKU: FA2019-9
Model

XH-M189
Core Chip

TPA3116D2 (Digital Class D)
Input Voltage

DC 12V – 24V
Output Power

50W + 50W (Stereo)
Efficiency

>90%
Signal-to-Noise Ratio (SNR)

100dB
Frequency Range

20Hz – 20kHz
Output Impedance

4Ω to 8Ω
Audio Input

3.5mm AUX Jack or 3-pin Header
Dimensions

84mm x 51mm x 29mm
Mounting

4x 3mm screw holes for secure installation
The XH-M189 TPA3116D2 Dual-Channel Digital Stereo Amplifier Board is a premium Hi-Fi audio solution engineered for high-fidelity sound reproduction in a compact form factor. Driven by the high-performance TPA3116D2 Class D core, this board delivers a powerful 50W+50W stereo output with exceptional thermal efficiency exceeding 90%.
Designed for DIY audiophiles and commercial audio integrators alike, the XH-M189 features an onboard volume potentiometer for precise gain control and high-grade inductive filters to ensure a crystal-clear, hiss-free listening experience. Whether you are upgrading desktop speakers, building a custom arcade cabinet, or installing a multi-room background music system, this module provides the punch and clarity required for high-end audio projects.
Key Features
  • Dual-Channel Stereo: Delivers a balanced 50W per channel, perfect for driving 4Ω to 8Ω bookshelf or floor-standing speakers.
  • Integrated Volume Control: Features a high-quality onboard potentiometer for smooth, analog-style volume adjustment.
  • Advanced Class D Architecture: Utilizing the TPA3116D2 chip ensures high power output with minimal heat, eliminating the need for bulky external cooling.
  • Superior Signal Filtering: Equipped with professional-grade solid-state capacitors and shielded inductors to filter out electromagnetic interference (EMI).
  • Wide Power Input: Operates reliably on any DC source from 12V to 24V, making it compatible with standard power adapters and battery packs.
  • Comprehensive Protection: Built-in safeguards against over-voltage, under-voltage, overheating, and short-circuiting protect both the board and your speakers
Usage Guidelines
  1. Power Input: Connect a stable DC power supply (12V-24V) to the power terminals. Warning: Reversing the polarity (+ and -) may damage the board.
  2. Speaker Wiring: Connect your Left (L) and Right (R) speakers to the dedicated screw terminals. Ensure the wires are tightly secured to prevent shorts.
  3. Audio Source: Plug in a 3.5mm audio cable from your phone/PC or use the 3-pin header for internal wiring within an enclosure.
  4. Optimal Performance: For the highest fidelity and maximum 50W per channel, use a 24V 5A power supply.
  5. Placement: While the board includes a heatsink, ensure it is placed in an area with some airflow if used at high volumes for several hours.
Q: Can I use a 12V power supply with this board?

Yes, the board will function perfectly at 12V. However, the maximum power output will be approximately 15W-20W per channel. For the full 50W output, a 24V supply is required.

Q: Does this board support Bluetooth?

The XH-M189 is a wired analog amplifier. To add Bluetooth functionality, you can connect an external Bluetooth receiver module to the 3.5mm input or the 3-pin audio header

Q: Is it safe to drive 4-ohm speakers?

Absolutely. The TPA3116D2 chip is highly stable with 4Ω loads. It actually produces more power at 4Ω than at 8Ω, making it ideal for car speakers or high-efficiency bookshelf speakers

Q: Why is there background noise when no music is playing?

Class D amplifiers are sensitive to “dirty” power. If you hear a hum or hiss, ensure you are using a regulated DC power supply and that your audio input cables are shielded and kept away from power lines.

Q: Can I bridge the two channels into one 100W mono channel?

The XH-M189 is designed specifically for stereo output. If you require a 100W mono output, we recommend using the XH-M542 mono amplifier board instead.

Q: Is this board suitable for business/commercial installations?

Yes. Its high efficiency and low heat profile make it excellent for long-term use in retail stores, restaurants, or kiosks. Its industrial-grade PCB components are designed for high durability in continuous-duty cycles.

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