Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Chip Model	MAX9814
Operating Voltage	2.7V - 5.5V DC
Gain Setting	Adjustable via Resistor (Default 40dB)
Frequency Response	20Hz to 20kHz
Signal-to-Noise Ratio	Typically 92dBA
Microphone Type	Electret Condenser Capsule
Output Interface	Analog Audio Out
PCB Dimensions	22mm x 14mm x 3mm
Power Consumption	Approx. 3mA at 3.3V
Application Scope	Voice Recognition, Recording, IoT Projects

6 reviews

Anonymous

Mar 21, 2026

Rating: 5/5

Great for learning DSP

Bought this for a university signal processing course. The output is clean enough to analyze without complex filtering. Documentation online is plentiful which helped a lot.

Anonymous

Mar 11, 2026

Rating: 5/5

Best budget mic amp

I have tried several modules in this category, and the MAX9814 consistently offers the best balance of sensitivity and noise floor. Highly recommended for voice assistant builds.

Anonymous

Mar 10, 2026

Rating: 4/5

Solid performance

Does exactly what it says. The AGC feature prevents clipping during loud sounds. Only wish the cable was included, but that's a minor issue for this price.

Anonymous

Mar 08, 2026

Rating: 5/5

Reliable and compact

Used this in a custom intercom system. The small footprint made it easy to fit inside the enclosure. Voltage range is flexible enough for both 3.3V and 5V logic systems.

Anonymous

Mar 03, 2026

Rating: 5/5

Perfect for Raspberry Pi projects

This module worked flawlessly with my Raspberry Pi Zero. The audio quality is surprisingly clear for the price point, and the automatic gain control handles varying voice volumes well.

Anonymous

Mar 01, 2026

Rating: 4/5

Good value, minor noise

Great little board for the money. I noticed a slight hiss when the gain is maxed out, but for standard voice commands, it performs excellently. Easy to solder headers onto.

5 FAQ

Q: Can this module be powered directly by a 3.3V pin on an Arduino?

A: Yes, the operating voltage range is 2.7V to 5.5V, so it is fully compatible with 3.3V logic boards like the Arduino Due or ESP32.

Q: Is the microphone capsule replaceable if it gets damaged?

A: Yes, the electret capsule is soldered to the PCB. If you have soldering skills, you can desolder the old one and replace it with a standard 6mm electret microphone.

Q: Does this output digital I2S audio or analog?

A: This module outputs analog audio signals. If you need digital I2S output, you will need to connect this to an external ADC or use a different module specifically designed for I2S.

Q: How do I adjust the gain if 40dB is too loud?

A: The gain is set by an external resistor connected to the AGC pin. You can replace the default resistor with a different value according to the MAX9814 datasheet to lower the gain.

Q: What is the length of the wires included?

A: This product typically ships as a bare PCB module without pre-attached wires. You will need to solder your own header pins or wires based on your project requirements.

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