The MAX9814 Microphone AGC Amplifier Module is a ready-to-use microphone board with an onboard electret condenser microphone and automatic gain control, operating from 2.7V to 5V, covering the full 20Hz to 20kHz audio range, and producing a clean output signal for connecting to the ADC pin of an Arduino, ESP32, or similar microcontroller. The most useful feature of this max9814 microphone module is its AGC — Automatic Gain Control — which means the board automatically adjusts its own amplification level depending on how loud or soft the sound is, so quiet voices get boosted and loud sounds do not get clipped or distorted in the output signal.
Three fixed gain levels are available on this max9814 microphone amplifier module by connecting one pin to VDD for 40dB, to GND for 50dB, or leaving it floating for 60dB — no resistors or potentiometers needed, just a wire connection to choose the sensitivity that suits the project environment. The max9814 mic module draws only 3mA from the supply, making it well suited for battery-powered voice recording and sound detection builds where low current draw matters.
The max9814 agc microphone module’s 0.04% Total Harmonic Distortion rating means the audio output is a highly accurate representation of the original sound — very little added noise or coloring from the amplifier circuit itself. Available from StemVolt, delivering genuine electronics components with trusted quality.
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Features:
- AGC automatically adjusts gain — no clipping when sound gets loud
- Three selectable gain levels: 40dB, 50dB, 60dB via single pin
- Full 20Hz–20kHz frequency response covers entire human hearing range
- Only 3mA current draw — ideal for battery-powered builds
- 0.04% THD ensures accurate low-distortion audio output signal
Technical specifications:
Applications:
- Mic module used for ESP32 Arduino voice command recognition build
- Uses max9814 mic module for audio input project
- Amplifier module price for battery voice recorder build
- Max9814 module for AGC automatic gain control lab
Package includes:
- 1 x MAX9814 Microphone AGC Amplifier Module
Arvind Joshi –
Transparent checkout, secure packaging, and reliable performance made it perfect for electronics projects.
Suresh Lalwani –
This microphone module delivered clear audio capture with excellent sensitivity and automatic gain control.
Vinay Rathore –
Shipped the same day
Manoj Mishra –
Worth every rupee spent
Pankaj Gurnani –
Expert guidance was helpful
Harish Shekhawat –
Anti-static packing ensured safety