The XH-A150 is a versatile audio amplifier board featuring Bluetooth 4.0 wireless input, USB and SD card playback, and dual-channel output. Powered by a 5 V micro USB input or a single 18650 lithium battery, it’s ideal for portable speaker builds and embedded audio systems.

Specifications

• Model: XH-A150 (MD0792)
• Amplifier Chip: PAM8403 (Class D)
• Bluetooth Version: 4.0 (receiver only)
• Operating Voltage: 5 V DC (via micro USB)
• Battery Support: 1 × 18650 lithium cell (holder included)
• Charging Circuit: Integrated (micro USB input)
• Audio Input:
  - Bluetooth wireless
  - USB flash drive (MP3 playback)
  - SD card (MP3 playback)
• Audio Output: 2-channel stereo speaker terminals
• Output Power: 5 W + 5 W (stereo)
• Transmission Range: Up to 20 m (open space)
• Speaker Impedance: 4–8 Ω recommended
• Dimensions: 99 mm × 64 mm × 24 mm
• Net Weight: ~42 g
• Indicators:
  - Power LED
  - Bluetooth pairing LED
  - Charging status LED
• Mounting: 4 × M3 holes
• PCB Colour: Typically blue

Features

• Bluetooth 4.0 stereo audio streaming
• USB and SD card MP3 playback support
• Onboard lithium battery holder and charging circuit
• Compact and portable for DIY speaker systems
• Ideal for wireless audio upgrades and STEM kits
• Common use cases:
  - Portable Bluetooth speaker builds
  - Classroom audio projects
  - Wireless audio bridges for legacy devices
  - Battery-powered sound systems