Description
Reviews
| 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 |
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.
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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