Attributes

Brand	-
Category	Robotics / STEM Teaching Tools / Sensors
Origin	-
Chip Model	MAX9814
Operating Voltage	2.7V - 5.5V DC
Gain Control	Automatic Gain Control (AGC)
Signal-to-Noise Ratio	Typically 90dB
Frequency Response	20Hz to 20kHz
Microphone Type	Electret Condenser Capsule
Output Interface	Analog Audio Out
PCB Dimensions	16mm x 12mm
Mounting Hole Diameter	2.5mm
Application Scope	Voice Recognition, Recording, IoT Projects

6 reviews

Anonymous

Mar 29, 2026

Rating: 5/5

Saved my semester project

I needed a reliable mic amp quickly and this arrived on time. The documentation online helped me get it running with Raspberry Pi in under an hour.

Anonymous

Mar 26, 2026

Rating: 5/5

Compact and Reliable

Used this for a home automation voice trigger. The small form factor fit perfectly inside my 3D printed enclosure. Power consumption is low as advertised.

Anonymous

Mar 21, 2026

Rating: 5/5

Perfect for Arduino Voice Projects

The AGC feature works flawlessly. I connected this to my Arduino Uno and the voice clarity is impressive even when moving away from the mic. Very easy to wire up.

Anonymous

Mar 12, 2026

Rating: 4/5

Good for educational kits

Bought ten of these for our workshop. Most worked perfectly out of the box. One had a loose pin but was easily soldered back. Great for teaching signal processing basics.

Anonymous

Mar 05, 2026

Rating: 4/5

Great value, minor noise floor

For the price, this module is unbeatable. There is a slight hiss if you max out the gain in a quiet room, but for normal speech detection, it performs excellently.

Anonymous

Mar 03, 2026

Rating: 5/5

Superior AGC performance

Unlike cheaper modules without AGC, this handles loud shouts and quiet whispers without clipping or disappearing. Highly recommended for any voice interface.

5 FAQ

Q: What is the output impedance of the audio signal?

A: The output is designed to drive high-impedance inputs typical of microcontroller ADCs, generally around 2kOhms.

Q: How long are the header pins if I want to mount this flush?

A: The standard headers are approximately 11mm tall. For flush mounting, we recommend desoldering them and using short pin headers or soldering wires directly.

Q: Is there a way to disable the Automatic Gain Control?

A: No, the MAX9814 chip has fixed AGC functionality that cannot be disabled; it is designed to maintain consistent output levels automatically.

Q: Does this module come with the microphone capsule included?

A: Yes, the module includes a pre-soldered electret microphone capsule ready for use.

Q: Can I power this directly from a 3.3V pin on an ESP32?

A: Absolutely. The operating voltage range is 2.7V to 5.5V, so 3.3V is within the safe operating limits.

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