A
Anonymous
Apr 01, 2026
Rating: 4/5
Good quality board
Works as expected. Soldering the gain jumpers was easy.
Description
MAX9814 Microphone Amplifier Module - MIC Audio Amplification 2.7V-5.5V Capsule Sensor
Reviews
Attributes
| Brand | - |
| Category | Electronic Components / Maker DIY / Computer Hardware, Monitors & Peripherals |
| Origin | - |
| Operating Voltage | 2.7V - 5.5V DC |
| Gain Settings | 20dB / 30dB / 40dB |
| Frequency Response | 20Hz to 20kHz |
| Signal-to-Noise Ratio | 92dB (A-Weighted) |
| Supply Current | 3.5mA (Typical) |
| Input Impedance | 2.2k Ohm |
| Output Type | Analog Audio |
| Microphone Type | Electret Condenser (Not Included) |
| PCB Dimensions | 20mm x 15mm x 3mm |
| Compatibility | Arduino, Raspberry Pi, ESP32 |
5 reviews
A
Anonymous
Mar 19, 2026
Rating: 5/5
Low noise
Very quiet background noise. Great for recording speech.
A
Anonymous
Mar 04, 2026
Rating: 4/5
Solid performance
Good gain range. Wish it came with a mic but understood from description.
A
Anonymous
Feb 09, 2026
Rating: 5/5
Perfect for voice projects
Clean signal amplification. Used it with an ESP32 for voice recognition.
A
Anonymous
Jan 19, 2026
Rating: 5/5
Reliable module
Bought five for our student projects. All working perfectly.
5 FAQ
Q: What is the maximum input voltage for the mic?
A: Please refer to the datasheet for your specific microphone, but the bias voltage is typically around 2V.
Q: Does this module include a microphone?
A: No, this is an amplifier module only. You need to connect an external electret microphone.
Q: How do I select the gain level?
A: There are solder jumpers on the PCB labeled for 20dB, 30dB, and 40dB settings.
Q: Can I power this with 3.3V?
A: Yes, the operating voltage range is 2.7V to 5.5V, so 3.3V is supported.
Q: Is the output signal digital or analog?
A: The output is an analog audio signal suitable for ADC input.
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