The XH-M312 Digital Audio Amplifier Board is a high-performance dual-channel stereo amplifier powered by the reliable TPA3118D2 Class-D audio chip. Designed for clear, powerful sound output, this board delivers up to 45W per channel when powered at 24V, making it ideal for DIY audio systems, speaker builds, and embedded audio projects.
Compact yet powerful, it offers excellent efficiency, low distortion, and built-in protection features for safe and stable operation.
⚙️ Technical Specifications
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Product Name: Digital Audio Amplifier Board
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Model: XH-M312
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Amplifier Chip: TPA3118D2 (Class D)
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Input Voltage: DC 12V–28V (24V recommended)
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Power Supply Interface: DC Jack 5.5 × 2.1mm
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Recommended Input Current: ≥ 3A
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Output Power:
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20W × 2 @ 12V
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45W × 2 @ 24V
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Output Impedance: 4–8Ω
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Input Impedance: 1KΩ
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Signal-to-Noise Ratio (SNR): 100dB
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Gain (Magnification): 30x
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Channels: Dual Channel (Stereo)
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Audio Input: 3.5mm Jack / XH2.54-3 Terminal Block
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Speaker Output: 5mm pitch 2P terminal block
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Board Size: 66 × 53mm
🔊 Key Features
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Powerful 45W + 45W stereo output (with 24V supply)
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High-efficiency Class-D amplification
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Low noise and distortion (100dB SNR)
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Built-in protections:
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Compact PCB design for easy installation
🎵 Ideal Applications
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DIY home audio systems
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Custom Bluetooth speaker builds
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Car audio projects
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Workshop or classroom sound systems
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Embedded audio in robotics or interactive displays
⚠️ Important Notes
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24V power supply is recommended for full 45W × 2 output.
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Use a power supply rated at 3A or higher.
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Ensure proper heat dissipation when operating at high power.
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Compatible with 4Ω–8Ω speakers.
💡 Perfect For
Makers, audio enthusiasts, electronics students, and DIY builders looking for a compact yet powerful stereo amplifier solution.
