# Speakers and Microphones

> Speaker and microphone modules: audio amplifiers, digital I2S microphones INMP441, MAX4466, speakers and electret capsules

- Shop: [Sigmanortec.ro](https://sigmanortec.ro/en/llms.txt)
- Category page: https://sigmanortec.ro/en/speakers-and-microphones
- Category: Mechatronics and IoT > Sensors and Modules > Audio and Sound > Speakers and Microphones
- Prices: RON, VAT included; prices and stock as of 2026-10-22 02:21 (Europe/Bucharest)

## Products (8)

### Audio module with SC8002B amplifier, built-in speaker, and volume control, 5V, 2W
- Page: https://sigmanortec.ro/en/audio-module-with-sc8002b-amplifier-built-in-speaker-and-volume-control-5v-2w
- Details: https://sigmanortec.ro/en/llms/p/2318.md
- Price: 40.23 RON
- Availability: In stock; 1-2 zile
- Reference: 88141 · EAN: 5944359312979
- Specifications: Type: Amplifier; Power: 0 - 20W; Input Voltage: 5 V; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.

Compact audio module with SC8002B amplifier, built-in speaker, and potentiometer for volume control. Operating voltage 5 VDC, current >500 mA, maximum output power 2W, amplification factor ~8.5x. 3-pin interface (GND, VCC, S), speaker volume 80 dB, dimensions 49 x 30 x 16 mm. Suitable for tones, alerts, and simple melodies in Arduino projects or other control systems.

### Digital Microphone Module, Original INMP441, I2S, Omnidirectional, 24-bit, 3.3V
- Page: https://sigmanortec.ro/en/digital-microphone-module-original-inmp441-i2s-omnidirectional-24-bit-33v
- Details: https://sigmanortec.ro/en/llms/p/2301.md
- Price: 44.46 RON
- Availability: In stock; 1-2 zile
- Reference: 88225 · EAN: 5941231086966
- Specifications: Input Voltage: 3.3 V

Digital MEMS microphone module INMP441 (original), omnidirectional, with 24-bit I2S output, intended for audio projects with ESP32 and other microcontrollers without a separate audio codec. Supply voltage 1.8V-3.3V, current consumption 1.4 mA, signal-to-noise ratio 61 dBA, sensitivity -26 dBFS, frequency response 60 Hz-15 kHz. Pins: VDD, GND, SCK, WS, SD, L/R for left/right channel selection.

### Digital Microphone Module, INMP441 Compatible, I2S, Omnidirectional, 24-bit, 3.3V
- Page: https://sigmanortec.ro/en/digital-microphone-module-inmp441-compatible-i2s-omnidirectional-24-bit-33v
- Details: https://sigmanortec.ro/en/llms/p/2302.md
- Price: 11.30 RON
- Availability: Out of stock
- Reference: 88226 · EAN: 5943318741232
- Specifications: Input Voltage: 3.3 V

Omnidirectional MEMS module with I2S output, ideal for audio projects with ESP32 and other microcontrollers, without a separate codec. Delivers 24-bit data for clear capture of voice and ambient sounds, has good signal-to-noise ratio and low power consumption. Operates at 1.8-3.3V , and left/right channel selection is made simply by the L/R pin.
The INMP441 Digital Microphone Module is an omnidirectional MEMS module with I2S output, designed for audio projects with ESP32 and other microcontrollers, without the need for a separate audio codec.

### MAX4466 microphone module, with amplification, adjustable gain, 2.3-5VDC
- Page: https://sigmanortec.ro/en/max4466-microphone-module-with-amplification-adjustable-gain-23-5vdc
- Details: https://sigmanortec.ro/en/llms/p/1635.md
- Price: 8.69 RON
- Availability: In stock; 1-2 zile
- Reference: 9520 · EAN: 5945422799697
- Specifications: Supply Voltage: 2.3 V; Maximum Input Voltage: 5 V; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.

Electret microphone module with MAX4466 amplifier, compatible with Arduino and other development boards. Supply voltage 2.4-5VDC (best performance at 3.3V), direct analog output to ADC. Gain adjustable via onboard potentiometer, from 25X to 125X, signal 200mVpp-5Vpp. Good rejection of power supply noise, suitable for FFT, voice changer and audio-reactive projects.

### 40mm 3W speaker
- Page: https://sigmanortec.ro/en/40mm-3w-speaker
- Details: https://sigmanortec.ro/en/llms/p/721.md
- Price: 7.50 RON
- Availability: In stock; 1-2 zile
- Reference: 33072 · EAN: 5940543217075
- Specifications: Power: 0 - 20W

Compact 40 mm speaker, height 20 mm, rated power 3 W, impedance 4 Ω, sensitivity 83 dB/W, frequency response 0.20-20 kHz, THD ≤ 5%. Paper diaphragm, PU surround, black cap, permanent magnet, moving coil. Full range playback, suitable for mini portable speakers, compact stereo systems or DIY projects. Connects to an amplifier with output up to 3 W at 4 Ω.

### Electret microphone capsule
- Page: https://sigmanortec.ro/en/electret-microphone-capsule
- Details: https://sigmanortec.ro/en/llms/p/317.md
- Price: 1.21 RON
- Availability: In stock; 1-2 zile
- Reference: 22207 · EAN: 5948350963697

Electret microphone capsule with 2 terminals, suitable for Arduino projects and other development boards. Converts sound into an electrical signal, useful for audio detection, simple recording or voice commands. Compact size, low power consumption, good sensitivity for general applications, connects via soldering or on a breadboard.

### Ultra slim speaker 40mm 8 ohms 0.5W
- Page: https://sigmanortec.ro/en/ultra-slim-speaker-40mm-8-ohms-05w
- Details: https://sigmanortec.ro/en/llms/p/53.md
- Price: 2.80 RON
- Availability: In stock; 1-2 zile
- Reference: 33209 · EAN: 5946606637613
- Specifications: Power: 0 - 20W

Ultra slim speaker with a 40mm diameter, 8 ohms impedance and 0.5W power. Its thin profile allows mounting in tight spaces, suitable for DIY audio projects, toys, alarms and other small electronic devices. The 8 ohms impedance provides wide compatibility with amplifiers. Reference 33209.

### Microphone module, high sensitivity, analog output
- Page: https://sigmanortec.ro/en/microphone-module-high-sensitivity-analog-output
- Details: https://sigmanortec.ro/en/llms/p/407.md
- Price: 12.38 RON
- Availability: In stock; 1-2 zile
- Reference: 33447 · EAN: 5940727863944

Microphone module with high sensitivity and analog output, suited for measuring sound level in Arduino projects and other development boards. Includes an integrated amplifier with adjustable gain and provides a stable signal for AD conversion. Operating voltage: 5VDC. Signal amplitude: VCC/2.