The XH-M314 is a dual-channel digital amplifier board based on the TPA3118 Class D chip. It supports Bluetooth 4.2 and AUX input, delivering up to 45 W per channel for 4–8 Ω speakers. Ideal for DIY speaker builds, embedded sound systems, and classroom audio projects.

Specifications

• Amplifier Chip: TPA3118 (Class D)
• Output Power: 45 W × 2 (stereo)
• Operating Voltage: DC 12 V–28 V
• Input Current: ≥ 3 A recommended
• Audio Input:
  - Bluetooth 4.2 (wireless)
  - AUX (3.5 mm stereo jack)
• Audio Output: 2-channel speaker terminals
• Speaker Impedance: 4–8 Ω
• Bluetooth Range: ~15 m (open space)
• Dimensions: 71 mm × 52 mm × 13 mm
• Net Weight: ~33 g
• Mounting: 4 × M3 holes
• Indicators:
  - Power LED
  - Bluetooth pairing LED
• PCB Colour: Typically blue

Features

• High-efficiency Class D stereo amplification
• Dual input modes: Bluetooth and AUX
• Wide voltage range for flexible power options
• Compact and lightweight for embedded or portable builds
• Ideal for DIY Bluetooth speakers, home audio upgrades, and STEM kits
• Common use cases:
  - Wireless speaker systems
  - Classroom audio projects
  - Bluetooth audio bridges for legacy devices
  - Battery-powered sound systems