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This I2S digital amplifier based on the MAX98357 I2S Class D amplifier module works great with microcontrollers with I2S audio outputs like ESP32 and can be applied to projects like IoT nodes, smart home devices, Bluetooth audio players, and so on.The module supports a 3.3V-5V power supply. And it can output over 2.5W of power when driven by 5V and a 4Ω speaker. Besides, it allows users to set different modes (off, left channel, right channel, and mixed) by changing the resistance on the SD port. The product defaults to mixed mode.



  • MAX98357 I2S digital Class D amplifier, power >2.5W
  • 3.3V~5V voltage power supply
  • Switchable sound channel
  • Adjustable gain
  • Output power: 3.2W at 4Ω,THD is 10% 
                                 1.8W at 8Ω,THD is 10% 
  • Sampling rate of I2S: 8Khz-96Khz 
  • Class D amplifier gain optional: 3/6/9/12/15dB 
  • No master clock (MCLK) 
  • Plug to Play: 35 different clocks and 128 digital audio formats are automatically configured with single power supply 
  • Suitable for Raspberry pi,Arduino and ESP32,and those with I2S audio output microcontroller or development board system



  • Bluetooth Audio Player
  • IoT Node Audio Player
  • Smart Home Voice Interaction
  • Robotic Device Audio Player



1. MAX98357A Datasheet


I2S 3W MAX98357 Audio Amplifier module Filter-free Class D Amplification

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