The MAX98357A I2S 3W Class-D Audio Decoder Amplifier Module lets you add speaker audio output to an ESP32, Raspberry Pi, or any microcontroller with an I2S port — no extra DAC chip needed, no analog wiring, just connect three digital signal wires and wire a small speaker to get sound output directly. This max98357a audio decoder takes the digital audio data coming from the microcontroller and converts it to amplified speaker output in one step, delivering up to 3 watts into a 4-ohm speaker from a standard 5V supply.
The i2s amplifier esp32 compatibility is one of its main strengths — the ESP32 has a built-in I2S audio output that connects directly to this board, making it the go-to choice for IoT voice alerts, music players, notification sounds, and robot speech projects in India. The max98357 i2s amplifier uses a Class-D switching design that runs up to 92% efficient, meaning the board stays cool without a heat sink even during extended audio playback — a big advantage over older amplifier designs that get warm and waste battery power as heat.
The i2s amplifier max98357a also produces clean sound even when a motor driver or other noisy component shares the same power supply, 77dB noise rejection rating. Five hardware gain settings from 3dB to 15dB let builders set the output volume level without any code changes. Available from StemVolt, this max98357a amplifier module is ideal for ESP32 and Raspberry Pi audio builds.
Related Products:
- Checkout Bluetooth 3.0 Audio Receiver Module
Features:
- No DAC chip needed — I2S digital input direct from microcontroller
- 3W speaker output from standard 5V supply at 4 ohms
- 92% efficient Class-D design stays cool without a heat sink
- Clean sound even when motor drivers share the same power rail
- 5 gain settings (3–15dB) adjustable without changing any code
Technical specifications:
Applications:
- Audio module used for ESP32 IoT voice alert speaker project
- Engineering students use max98357a audio decoder for robot build
- Maker build Raspberry Pi music player with max98357 i2s amplifier
- Uses max98357a amplifier module for Class-D efficiency experiment
Package includes:
- 1 x MAX98357A I2S 3W Class-D Audio Decoder Amplifier Module
Ashish Mathur –
It delivered clear digital audio output and integrated seamlessly with my ESP32 project.
Narendra Shekhawat –
Impressed with the module performance
Gaurav Maheshwari –
Received on time and exactly as described
Satish Tripathi –
Foam-protected packaging, easy payment process, and helpful support made this purchase completely worthwhile.