The 82D12 is a digital Class D amplifier module designed for 2.0 stereo output. It supports Bluetooth 2.0 wireless audio streaming and operates from a 12 V DC supply, making it ideal for DIY speaker builds, audio upgrades, and embedded sound systems.

Specifications

• Model: 82D12 (MD0858)
• Amplifier Type: Digital stereo amplifier (2.0 channel)
• Bluetooth Version: 2.0 (receiver only)
• Operating Voltage: 12 V DC
• Current Consumption: ~500 mA
• Output Power: 5 W × 2 (stereo)
• Audio Input: Bluetooth wireless only
• Audio Output: 2-channel speaker terminals
• Speaker Impedance: 4–8 Ω recommended
• Dimensions: ~45 mm × 30 mm
• Mounting: 4 × M3 holes
• Indicators:
  - Power LED
  - Bluetooth pairing LED
• PCB Colour: Typically blue

Features

• Wireless stereo audio streaming via Bluetooth 2.0
• Compact and low-power design for embedded or portable builds
• Plug-and-play for DIY speaker systems and classroom kits
• Ideal for wireless audio upgrades and automation projects
• Common use cases:
  - Bluetooth speaker enclosures
  - STEM audio amplifier kits
  - Wireless audio bridges for legacy devices
  - Battery-powered sound systems