Digital Bluetooth Amplifier 2x20W

Description: The digital Bluetooth amplifier provides an excellent solution for your audio projects with a power of 2x20W. Equipped with Bluetooth 5.0, it enables a stable connection over a distance of up to 15 meters. Ideal for use with Raspberry Pi or mobile phones, it transforms any environment into a sound room with excellent stereo sound quality. Additionally, the amplifier offers protection against reverse currents, short circuits and static electricity, ensuring its longevity and reliability.


  • Place the amplifier board as far away as possible from WIFI signal sources to avoid interference.
  • An operating voltage of 5-24VDC is recommended. Voltages above 26V can damage the chip.
  • The input voltage must not exceed 16V when using 4Ω speakers and 24V when using 8Ω speakers.
  • A current of at least 2A is recommended for power supply.
  • Speaker cables should not be longer than 1m.
  • Pay attention to electrostatic discharge, as the Bluetooth chip is very sensitive to static electricity.
  • Use speakers with more than 40W power to avoid damage.
  • At low supply voltage and high output power, noise may occur. Reducing the volume or increasing the supply voltage can remedy this.

Recommended Accessories:


  • Bluetooth 5.0 for a stable connection up to 15 meters.
  • Compatible with a variety of speakers (40W-200W).
  • Built-in protection against reverse currents, short circuits and static electricity.
  • Easy operation and installation for versatile applications.

Application Examples:

  • Perfect as a small Bluetooth speaker in conjunction with Raspberry Pi or mobile phones.
  • Ideal for DIY audio projects, home theater systems or portable speakers.

Technical Specifications:

  • Manufacturer: DFRobot 
  • Manufacturer-SKU: DFR0675-EN
  • Supply Voltage: 5-24V
  • Bluetooth: 5.0
  • Transmission Distance: 15m (visible)
  • Sound Channels: Two (Stereo)
  • Output Power (@1KHz):
    • 20W*2 at 12V 4Ω
    • 30W*2 at 16V 4Ω
    • 30W*2 at 21V 8Ω
    • 40W*2 at 24V 8Ω
  • Suitable Speakers: 4Ω (5-16V), 8Ω (5-24V)
  • Dimensions:  55 x 38 x 15mm
  • Weight: 31.4g

Delivery Contents:

  • 1x Digital Bluetooth Amplifier 2x20W 
  • 1x Acrylic Case
  • 1x Accessories Package

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Digital Bluetooth Amplifier 2x20W

  • Brand: DFRobot
  • Product Code: 423478
  • Availability: In Stock
  • CHF12.90

  • Ex Tax: CHF11.93

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Tags: Bluetooth, Amplifier, Stereo, 20W, DIY, Audio Projects, Raspberry Pi, Speakers, 5.0, Digital, Music, Home Theater, Volume Control, Accessories