MAX98357 I2S 3W Class D Audio Amplifier Module
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Prices updated: 13 Oct 2026
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About this product
A module based on the MAX98357 chip that accepts digital audio over I2S, converts it to analog and amplifies it to drive a speaker directly. It is suited to Raspberry Pi audio projects. The stereo signal is mixed (L+R) by default, and a resistor can be used to output only the left or right channel.
Specifications
- Interface
- I2S digital audio input
- Chip
- MAX98357
- Operating voltage
- 2.7 V to 5.5 V
- Output power
- 3.2 W at 10% THD (4 Ω speaker, 5 V supply)
- PSRR
- 77 dB at 1 kHz
- Output channel
- L+R mixed by default; L or R selectable by resistor
- Compatibility
- Raspberry Pi
Frequently asked questions
How do I wire it to a Raspberry Pi?
Connect the I2S clock (BCLK), word select (LRCLK) and data (DIN) lines, plus 5 V or 3.3 V power within the 2.7 to 5.5 V range and GND, then connect a speaker to the output terminals. Confirm the pin labels on your module before wiring.
Which speaker should I use?
The rated output power is measured with a 4 Ω speaker at a 5 V supply, so a 4 Ω speaker matches the listed performance. Use a speaker that can handle the output power.
