# Audio and Sound

> Audio amplifiers, Bluetooth modules, speakers, microphones, buzzers and MP3 modules for sound projects

- Shop: [Sigmanortec.ro](https://sigmanortec.ro/en/llms.txt)
- Category page: https://sigmanortec.ro/en/audio-and-sound
- Category: Mechatronics and IoT > Sensors and Modules > Audio and Sound
- Prices: RON, VAT included; prices and stock as of 2026-10-22 01:32 (Europe/Bucharest)

## Subcategories

- [Buzzers and Alarms](https://sigmanortec.ro/en/llms/c/172.md): Active and passive buzzers, siren modules and warning lights for alarms and audible notifications (11 products)
- [Speakers and Microphones](https://sigmanortec.ro/en/llms/c/196.md): Speaker and microphone modules: audio amplifiers, digital I2S microphones INMP441, MAX4466, speakers and electret capsules (8 products)
- [Audio Amplifiers](https://sigmanortec.ro/en/llms/c/263.md): Audio amplifier modules (TPA3116, TDA7294, PAM8403, LM386), preamplifiers, Bluetooth modules and DIY kits (27 products)

## Products (63)

### Audio amplifier TDA7297, 2x15W, 12V
- Page: https://sigmanortec.ro/en/audio-amplifier-tda7297-2x15w-12v
- Details: https://sigmanortec.ro/en/llms/p/13.md
- Price: 31.04 RON
- Availability: In stock; 1-2 zile
- Reference: 33559 · EAN: 5947806119800
- Specifications: Type: Amplifier; tension: AD; Power: 0 - 20W; Input Voltage: 12 V

Stereo audio amplifier TDA7297, class AB, 2x15W at 12V, supply voltage range 6-18V DC. Drives speakers with 4-8 ohm impedance, signal-to-noise ratio above 98dB, total harmonic distortion below 0.1%. Compact dimensions 29x33mm, suitable for DIY projects and home audio systems.

### Audio amplifier TDA7498E, 2x160W
- Page: https://sigmanortec.ro/en/audio-amplifier-tda7498e-2x160w
- Details: https://sigmanortec.ro/en/llms/p/14.md
- Price: 160.25 RON
- Availability: In stock; 1-2 zile
- Reference: 33558 · EAN: 5941886773372
- Specifications: Type: Amplifier; tension: AD; Power: Over 20W

Audio amplifier TDA7498E, class D, 2 channels, output power 2x160W at 4 ohms or 2x100W at 8 ohms. Supply voltage DC 15-36V (recommended 32V, 8A). Output impedance 4-8 ohms, efficiency 85%, signal-to-noise ratio > 100dB, total harmonic distortion < 0.01%. Built-in fan for cooling. Suitable for home audio systems, DIY projects and professional audio applications.

### PAM8610 dual channel 10W stereo amplifier
- Page: https://sigmanortec.ro/en/pam8610-dual-channel-10w-stereo-amplifier
- Details: https://sigmanortec.ro/en/llms/p/17.md
- Price: 11.58 RON
- Availability: In stock; 1-2 zile
- Reference: 33039 · EAN: 5941718073229
- Specifications: Type: Amplifier; tension: AD; Power: 0 - 20W

Class D digital stereo amplifier module, ideal for compact audio projects, delivers 2x10W with low distortion and low EMI for clean sound. Operates at 7-15VDC, recommended 12V, offers up to 32dB gain and good SNR, includes pins for power, stereo input, mute and dedicated speaker outputs. Dimensions 30x25mm.
Digital stereo amplifier PAM8610 / HCMODU0086 with 2 channels of 10W each, class-D, low THD+N (0.1%), low EMI, offers good PSRR thus high sound reproduction quality. Maximum volume "Gain" set at 32dB. The module pins provide connections for power supply, stereo audio input, mute, left and right speaker.
Specifications:
Power supply voltage: 7-15VDC (recommended 12VDC, 3A) …

### 2x100W TDA7498 amplifier module
- Page: https://sigmanortec.ro/en/2x100w-tda7498-amplifier-module
- Details: https://sigmanortec.ro/en/llms/p/327.md
- Price: 72.95 RON
- Availability: In stock; 1-2 zile
- Reference: 33347 · EAN: 5946107639963
- Specifications: Type: Amplifier; tension: AD; Power: Over 20W

TDA7498 class D audio amplifier module with dual-BTL output 2x100W (Vcc=36V, RL=6ohm, THD 10%) or 80W+80W at 34V/8ohm. Supply voltage 15-34VDC, 24V recommended. Recommended speaker impedance 8 ohm; using 4 ohm speakers may damage the module. 4 fixed gain steps (25.6-37.6dB), short-circuit and over-temperature protection, Normal, Standby and Mute modes. Suited for home theater and active speakers.

### LM386 audio amplifier module, 5 12VDC
- Page: https://sigmanortec.ro/en/lm386-audio-amplifier-module-5-12vdc
- Details: https://sigmanortec.ro/en/llms/p/328.md
- Price: 5.01 RON
- Availability: In stock; 1-2 zile
- Reference: 33146 · EAN: 5945174375224
- Specifications: Type: Amplifier; tension: AD; Power: 0 - 20W; Supply Voltage: 5; Maximum Input Voltage: 12

Mono audio amplifier module based on the LM386, reference 33146. Amplifies the audio signal up to 200x to drive small speakers. Operates at 4-12VDC, features an onboard potentiometer for gain adjustment and a status LED. Output power: 325mW at 6V, 500mW at 9V. It is a signal amplifier and does not deliver real 20W power.

### PAM8403 audio amplifier module, with potentiometer, 3W, 2CH
- Page: https://sigmanortec.ro/en/pam8403-audio-amplifier-module-with-potentiometer-3w-2ch
- Details: https://sigmanortec.ro/en/llms/p/329.md
- Price: 9.08 RON
- Availability: In stock; 1-2 zile
- Reference: 33421 · EAN: 5948707722007
- Specifications: Type: Amplifier; tension: AD; Power: 0 - 20W

PAM8403 stereo audio amplifier module with integrated potentiometer for volume control, 2 channels. Power supply 5V DC, output power 3W x 2 channels. Compatible with 4-8 Ohm speakers (4Ohm recommended). Suitable for DIY projects, small speakers and portable systems.

### MP3 amplifier module
- Page: https://sigmanortec.ro/en/mp3-amplifier-module
- Details: https://sigmanortec.ro/en/llms/p/330.md
- Price: 10.89 RON
- Availability: In stock; 1-2 zile
- Reference: 22194 · EAN: 5943183161920
- Specifications: Type: Amplifier; tension: AD; Power: 0 - 20W; Input Voltage: 5 V; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.

MP3 module with integrated 2W mono amplifier, ideal for Arduino projects and compact audio applications. Plays directly from MicroSD card, powered by 5V or 3.7V battery with MicroUSB charging, offers audio output on gold-plated 3.5 mm jack or connectors, has buttons for play, volume and song change.
The 2W MP3 module with integrated amplifier is a compact, self-contained solution for playing audio files directly from a MicroSD card or USB flash drive, without requiring a microcontroller to operate.

### Bluetooth 4.2 BLE audio module, stereo, MH-M18
- Page: https://sigmanortec.ro/en/bluetooth-42-ble-audio-module-stereo-mh-m18
- Details: https://sigmanortec.ro/en/llms/p/333.md
- Price: 8.05 RON
- Availability: In stock; 1-2 zile
- Reference: 33354 · EAN: 5940425595963

Bluetooth 4.2 BLE audio module for low-power stereo streaming, ideal for DIY projects and portable audio equipment. Offers lossless playback and decoding of WAV WMA FLAC APE MP3, dual channel LR output for direct connection to an amplifier, range up to 20 m in open space, support for volume buttons and Mute function for quick control.
Bluetooth 4.2 audio module, M18.
It is a low power consumption module, supports the latest Bluetooth 4.2, two stereo channels for lossless playback. In open spaces, the distance can reach up to 20 meters.
Supports lossless decoding WAV/WMA/FLAC/APE/MP3, dual channel stereo output.

### MP3 module mini WTV020 MiniSD card
- Page: https://sigmanortec.ro/en/mp3-module-mini-wtv020-minisd-card
- Details: https://sigmanortec.ro/en/llms/p/411.md
- Price: 16.92 RON
- Availability: In stock; 1-2 zile
- Reference: 33153 · EAN: 5942818771008

Mini audio module WTV020 for MP3 and WAV playback, with MicroSD MiniSD card reader and 16-bit DAC. Communicates via CLK/DATA or UART232, supports button control and folder organization. Power supply 2.6-3.6VDC, FAT card 32MB-1GB, IC GD3200A. Can operate standalone, powered by battery or microcontroller; compatible with Arduino and other development boards.

### MP3 Shield VS1053 for UNO, microphone and TF slot, 5V
- Page: https://sigmanortec.ro/en/mp3-shield-vs1053-for-uno-microphone-and-tf-slot-5v
- Details: https://sigmanortec.ro/en/llms/p/713.md
- Price: 66.95 RON
- Availability: In stock; 1-2 zile
- Reference: 33173 · EAN: 5946368294734
- Specifications: Input Voltage: 5V; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.

Shield with VS1053 audio decoder for Arduino Uno, ideal for MP3 playback from embedded projects. Integrates card slot, SPI interface for fast communication, stereo audio output for connection to amplifier or headphones, compatible with Arduino libraries for easy control of play, pause and volume.
This expansion board for Arduino UNO is a practical and versatile solution for projects that require MP3 audio playback and recording. Equipped with the VS1053 decoder, the board supports multiple audio formats such as MP3, Ogg Vorbis, AAC, WMA, and MIDI, offering high flexibility for various multimedia applications.

### Bluetooth 4.1 audio receiver module, MicroSD, TF, Card, USB interface, 3.7 - 5V
- Page: https://sigmanortec.ro/en/bluetooth-41-audio-receiver-module-microsd-tf-card-usb-interface-37-5v
- Details: https://sigmanortec.ro/en/llms/p/849.md
- Price: 19.93 RON
- Availability: In stock; 1-2 zile
- Reference: 9036 · EAN: 5944825237898
- Specifications: Supply Voltage: 3.7; Maximum Input Voltage: 5; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.

Quickly transform any speaker or amplifier into a wireless player, with Bluetooth 4.1 and a range of over 15 m for stable streaming. Offers direct playback from USB and MicroSD TF card, compatible with MP3, WAV, APE, FLAC, with 3.5 mm stereo jack output for easy connection. 3.7-5V power supply via Micro-USB, simple control for changing mode, songs and volume, LED indicator for status.

### PAM8610 stereo amplifier, 2x10W, Hi-Fi
- Page: https://sigmanortec.ro/en/pam8610-stereo-amplifier-2x10w-hi-fi
- Details: https://sigmanortec.ro/en/llms/p/860.md
- Price: 20.44 RON
- Availability: In stock; 1-2 zile
- Reference: 9053 · EAN: 5945678787677
- Specifications: Type: Amplifier; tension: AD; Power: 0 - 20W

Class D Hi-Fi stereo amplifier module built around the PAM8610 IC, delivering 2x10W at 8 Ohm. Powered by 7.5-15VDC (recommended 12VDC) via a 5.5x2.1mm barrel jack, center pin positive. Quiescent current 20mA, frequency response 20Hz-50KHz. Includes a volume potentiometer, 3.5mm stereo audio input jack, ON/OFF and MUTE connectors, and a status LED.

### Bluetooth 4.2 BLE audio module, stereo, MH-M28
- Page: https://sigmanortec.ro/en/bluetooth-42-ble-audio-module-stereo-mh-m28
- Details: https://sigmanortec.ro/en/llms/p/868.md
- Price: 12.38 RON
- Availability: Out of stock
- Reference: 9062 · EAN: 5945623049560

Bluetooth 4.2 BLE audio module for stereo playback, ideal for DIY projects and active speakers, offers low consumption and stable connection up to 20 m in open space. It is powered by 5V via MicroUSB or 3.7-4.2V from a 1S battery, has audio output on the jack and supports WAV WMA FLAC APE MP3 lossless decoding. The connection is quick, the phone detects it and playback starts immediately.
Bluetooth 4.2 audio module, M28.
It is a module with low current consumption, supports the latest Bluetooth 4.2, two stereo channels for lossless playback. In open spaces, the distance reaches up to 20 meters.
This module has a MicroUSB connection for power and an audio jack …

### Bluetooth 4.2 BLE audio module, stereo, MH-M38, 2x5W
- Page: https://sigmanortec.ro/en/bluetooth-42-ble-audio-module-stereo-mh-m38-2x5w
- Details: https://sigmanortec.ro/en/llms/p/869.md
- Price: 14.91 RON
- Availability: Out of stock
- Reference: 9063 · EAN: 5940240466363
- Specifications: Type: Amplifier; Power: 0 - 20W

Bluetooth 4.2 BLE audio module with integrated 2x5W amplifier, ideal for DIY speakers or compact audio projects, offers lossless stereo playback and quick connection from your phone. It operates at low consumption, has a range of up to 20 m in open space, is powered by MicroUSB at 5V or 3.7-4.2V , comes with included wires for easy assembly.
Bluetooth 4.2 audio module, M38, provided with wires included in the package.
The main difference between this module and other MH-M time modules... is given by the fact that it has an integrated amplifier with 2 channels of 5W.
It is a module with low current consumption, supports the latest Bluetooth 4.2, two stereo channels for lossless playback.

### Audio transmitter module, Bluetooth 5.1, BLE
- Page: https://sigmanortec.ro/en/audio-transmitter-module-bluetooth-51-ble
- Details: https://sigmanortec.ro/en/llms/p/911.md
- Price: 38.31 RON
- Availability: In stock; 1-2 zile
- Reference: 9108 · EAN: 5940292546211

Bluetooth 5.1 BLE audio transmitter with integrated USB sound card, ideal for quickly sending sound from PC, TV or other sources to Bluetooth headphones or speakers, without cables. It offers stable stereo signal through GFSK modulation and antenna on PCB, is powered at 3.3-5V and has easy pairing without password, with support for AT commands via serial for integration into Arduino projects.
Bluetooth audio transmission module integrated with a USB sound card, which adopts Bluetooth version 4.1 to ensure the quality and stability of the transmitted audio signal.
This module can receive any audio signal from any audio source such as computer USB port, phones, TV, AUX, etc...

### Bluetooth 4.1 BLE Audio Module, Stereo, Aux-In, Type-C
- Page: https://sigmanortec.ro/en/bluetooth-41-ble-audio-module-stereo-aux-in-type-c
- Details: https://sigmanortec.ro/en/llms/p/1409.md
- Price: 11.75 RON
- Availability: In stock; 1-2 zile
- Reference: 9303 · EAN: 5943788222149

Bluetooth 4.1 BLE audio receiver module with stereo two-channel output via AUX-IN or LGR. Supports A2DP, AVCTP, AVTDP, AVRCP and HFP. Powered at 5VDC via Type-C or 3.7V Li-ion battery. Dimensions: 30 x 32 x 7.5mm. Can be used to add Bluetooth functionality to any audio playback device with AUX-IN.

### Bluetooth 5.0, 2.1, TPA3116 amplifier, 2x50W, 1x100W
- Page: https://sigmanortec.ro/en/bluetooth-50-21-tpa3116-amplifier-2x50w-1x100w
- Details: https://sigmanortec.ro/en/llms/p/1421.md
- Price: 195.35 RON
- Availability: In stock; 1-2 zile
- Reference: 9315 · EAN: 5940214533299
- Specifications: Type: Amplifier; tension: AD; Power: Over 20W

2.1 amplifier with Bluetooth 5.0 and AUX input, ideal for stereo speakers and subwoofer in compact audio projects. Delivers 2x50W for left and right channels and 1x100W for bass, operates at 12-24VDC, includes short-circuit, overcurrent and overheating protections, and copper terminals ensure safe contact and high current.
3-channel amplifier (2.1) with Bluetooth 5.0 and AUX-IN.
This amplifier offers two 50W channels and a 100W Subwoofer channel.
It offers protection against short circuiting, reverse connection and excessive temperature.
The connectors and terminals are made of copper to avoid their overheating and to be able to withstand a higher current.
Specifications:
Model: Zk-MT21 …

### HiFi audio isolator module, 3.5mm jack
- Page: https://sigmanortec.ro/en/hifi-audio-isolator-module-35mm-jack
- Details: https://sigmanortec.ro/en/llms/p/1440.md
- Price: 25.03 RON
- Availability: In stock; 1-2 zile
- Reference: 9334 · EAN: 5946803060498

HiFi audio isolator module (ref. 9334, EAN 5946803060498) with AUX 3.5mm jacks at input and output, eliminates hum and noise caused by common ground between audio source and amplifier, speakers or car audio. Effectively isolates GND to reduce distortion, compact 45 x 30mm format, suitable for PC, TV, DAC or car audio systems.

### HiFi audio isolator module, pin terminal
- Page: https://sigmanortec.ro/en/hifi-audio-isolator-module-pin-terminal
- Details: https://sigmanortec.ro/en/llms/p/1441.md
- Price: 24.91 RON
- Availability: In stock; 1-2 zile
- Reference: 9335 · EAN: 5944466565756

HiFi audio isolator module with 3-pin terminal (ref. 9335, EAN 5944466565756). Reduces noise and hum caused by ground loops when connecting an audio source to an amplifier, player or active speakers, providing GND isolation for the HiFi signal. Compact 45 x 30 mm format, suitable for automotive, home audio and DIY projects.

### XH-M164 Preamplifier Module, NE5532, HiFi, Volume and Tones, 9-18VAC
- Page: https://sigmanortec.ro/en/xh-m164-preamplifier-module-ne5532-hifi-volume-and-tones-9-18vac
- Details: https://sigmanortec.ro/en/llms/p/1528.md
- Price: 39.75 RON
- Availability: Out of stock
- Reference: R-9421 · EAN: 5942831232302
- Specifications: Type: Preamplifier; tension: NEEDLE; Input Voltage: 9-18 VAC; Input Voltage Type: AC

XH-M164 HiFi stereo preamplifier module with NE5532 chip. Requires dual AC power supply 9-18VAC (recommended 12VAC), power consumption 5W. Features 2 output channels, full sound control (volume, bass, mid, treble), audio input via Lotus socket and output via XH2.54mm 3P connector. Mounting holes M3, hole spacing 93 x 53mm, module dimensions 100 x 60mm.

### Audio module Bluetooth 5.0, BLE, VHM-314, Stereo, MP3
- Page: https://sigmanortec.ro/en/audio-module-bluetooth-50-ble-vhm-314-stereo-mp3
- Details: https://sigmanortec.ro/en/llms/p/1535.md
- Price: 11.39 RON
- Availability: In stock; 1-2 zile
- Reference: 9425 · EAN: 5948483264104

Bluetooth 5.0 audio module for stereo MP3 playback, ideal for DIY projects and integration into speakers or car systems. Offers AUX output on 3.5 mm jack with 2 channels L and R, stable connection up to 15 m and blue LED indicator for status. Works directly with 3.7 V lithium battery and includes charging circuit, flexible power supply to 5 V including via Type C plug.
Bluetooth audio module, version 5.0, VHM-314, 2-channel output, equipped with 3.5mm jack for AUX output.
It has a blue status indicator and can be used directly with a 3.7V lithium battery, the module having a lithium charging circuit.
Power can be supplied from 5V, from the battery or via the Type C connector.

### Audio amplifier module, 420Wx2, HX-M252, TDA8954TH, 24VAC, Stereo HiFi, Class D
- Page: https://sigmanortec.ro/en/audio-amplifier-module-420wx2-hx-m252-tda8954th-24vac-stereo-hifi-class-d
- Details: https://sigmanortec.ro/en/llms/p/1548.md
- Price: 306.88 RON
- Availability: In stock; 1-2 zile
- Reference: R-9438 · EAN: 5948107883995
- Specifications: Type: Amplifier; tension: NEEDLE; Power: Over 20W; Input Voltage: 24 VAC; Input Voltage Type: AC; Model: HX-M252

HiFi class D stereo amplifier module for power audio projects, offers 2x420W on two channels with TDA8954TH and works with 2-8 Ohm speakers. It is powered by dual AC 24-30V, has a generous radiator for efficient dissipation and screw terminals for quick connection. Recommended with preamplifier for volume and tone control.
Class D amplifier module, XH-M252 with TDA8954TH, two channels of 420W each, which supports speakers with impedance between 2 and 8 ohms.
It is recommended to use a 24VAC double loop power supply and a 300W or larger ring transformer.

### Amplifier module with 18650, PAM8403, 2x5W output, Bluetooth, Stereo, SD Card
- Page: https://sigmanortec.ro/en/amplifier-module-with-18650-pam8403-2x5w-output-bluetooth-stereo-sd-card
- Details: https://sigmanortec.ro/en/llms/p/1648.md
- Price: 31.36 RON
- Availability: In stock; 1-2 zile
- Reference: 9533 · EAN: 5944558026233
- Specifications: Type: Amplifier; tension: AD; Power: 0 - 20W; Model: PAM8403

Compact solution for audio playback and stereo amplification, offers 2x5W at 4 ohms with PAM8403 class D, plays music via Bluetooth, USB or MicroSD card, is powered at 5V via MicroUSB or from a 18650 battery in a dedicated slot, includes charge management and status LEDs.
Audio playback module with PAM8403 amplifier with 2 channels of 5W each, stereo output 2.0, Stereo D, MicroSD and USB card support.
The module can be powered through the MicroUSB plug or from the 18650 battery inserted in the dedicated slot.

### 30-second recording board with playback, button trigger, for DIY greeting cards
- Page: https://sigmanortec.ro/en/30-second-recording-board-with-playback-button-trigger-for-diy-greeting-cards
- Details: https://sigmanortec.ro/en/llms/p/1653.md
- Price: 23.20 RON
- Availability: Out of stock
- Reference: 9538 · EAN: 5948972978918

Audio module for DIY greeting cards (ref. 9538), allows recording and playback of messages up to 30 seconds. Includes microphone and integrated speaker (0.5W, 16 Ohm), powered by button cell batteries (not included). Factory set with 2-button trigger (record/play), modifiable for external button or photoresistor trigger (not included). Continuous recording. Board dimensions: 50 x 40mm, speaker: 30mm diameter.

### Digital to analog audio converter, coaxial
- Page: https://sigmanortec.ro/en/digital-to-analog-audio-converter-coaxial
- Details: https://sigmanortec.ro/en/llms/p/1658.md
- Price: 35.15 RON
- Availability: In stock; 1-2 zile
- Reference: 9543 · EAN: 5945497960190

Quickly converts Coaxial or Toslink digital audio signal into L and R stereo analog audio, ideal for connecting your TV or console to an amplifier, active speakers or Hi-Fi system. Supports 24-bit S/PDIF with sampling rates of 32 to 96 kHz, offers stable transmission without electromagnetic noise, has RCA and Toslink connectors, compact format, 5V power supply.
Digital audio to analog audio converter module used to convert from Coaxial or Toslink audio signal to Analog L/R audio signal.
It supports sampling rates of 32, 44.1, 48 and 96KHz, 24-bit S/PDIF on the Left and Right channels.
The transmission is free of electromagnetic noise and is simple to install and use.
Specifications …

### Amplifier module XH-M253, 420W, Mono, HiFi, TDA8954TH, 12-28V
- Page: https://sigmanortec.ro/en/amplifier-module-xh-m253-420w-mono-hifi-tda8954th-12-28v
- Details: https://sigmanortec.ro/en/llms/p/1683.md
- Price: 333.65 RON
- Availability: In stock; 1-2 zile
- Reference: 9571 · EAN: 5948761762155
- Specifications: Type: Amplifier; tension: NEEDLE; Power: Over 20W; Supply Voltage: 12; Maximum Input Voltage: 28; Maximum Controlled Power: 420

XH-M253 Class D HiFi amplifier module based on the TDA8954TH IC, with mono output up to 420W. Dual AC power supply 12-28V via a 3-wire transformer, output impedance 2-8 Ohm (4 Ohm recommended). Uses a rectifier bridge with J13003 transistor and 2200uF filter capacitors. Dimensions: 82 x 72 x 37mm.

### Audio amplifier module, PAM8403, 3.6-5V, 2x3W
- Page: https://sigmanortec.ro/en/audio-amplifier-module-pam8403-36-5v-2x3w
- Details: https://sigmanortec.ro/en/llms/p/1696.md
- Price: 5.28 RON
- Availability: In stock; 1-2 zile
- Reference: 9583 · EAN: 5941183755958
- Specifications: Type: Amplifier; tension: AD; Power: 0 - 20W; Supply Voltage: 3.6; Maximum Input Voltage: 5; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.

Digital audio amplifier module based on the PAM8403 chip, supply voltage 3.6-5VDC, delivering stereo power 2x3W (2 channels), output impedance 4 or 8 ohm. Frequency response 20Hz-20kHz, SNR above 90dB, THD below 0.1%, efficiency over 90%. Stereo audio input via pins (no jack socket), suitable for portable audio projects and DIY speakers. Dimensions 15.5 x 24mm.

### TDA7294 audio amplifier module, 12-32VAC, 100W, 1 channel
- Page: https://sigmanortec.ro/en/tda7294-audio-amplifier-module-12-32vac-100w-1-channel
- Details: https://sigmanortec.ro/en/llms/p/1701.md
- Price: 43.00 RON
- Availability: Out of stock
- Reference: 9588 · EAN: 5942701899451
- Specifications: Type: Amplifier; tension: NEEDLE; Power: Over 20W; Input Voltage: 12-32VAC; Input Voltage Type: AC; Model: TDA7294

Mono audio amplifier module with TDA7294 IC, maximum output power 100W (nominal about 85W) on 1 channel, for 4-8 ohm speakers. Power supply 12-32VAC (2x12VAC...2x32VAC, AC-GND-AC from center-tapped transformer), DC not supported. Line-level input 200mV-1Vrms, 100 kOhm input impedance, 20Hz-20kHz frequency range. Screw terminal connections. Requires mounting on a heatsink.

### Audio preamplifier module, XH-A901, NE5532, 12-24VDC
- Page: https://sigmanortec.ro/en/audio-preamplifier-module-xh-a901-ne5532-12-24vdc
- Details: https://sigmanortec.ro/en/llms/p/1704.md
- Price: 33.02 RON
- Availability: Out of stock
- Reference: R-9591 · EAN: 5944921540885
- Specifications: Type: Preamplifier; tension: AD; Supply Voltage: 12; Maximum Input Voltage: 24; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.; Model: XH-A901

Stereo audio preamplifier module XH-A901, based on 2 x NE5532 (socketed), for hi-fi systems. Power supply 12-24VDC. Adjustments: Volume, Treble (±15dB), Middle, Bass (±15dB). Frequency response 20Hz-20KHz, signal-to-noise ratio >100dB, distortion 

### 4-channel audio amplifier module, 4x3W, XH-A156, 5V
- Page: https://sigmanortec.ro/en/4-channel-audio-amplifier-module-4x3w-xh-a156-5v
- Details: https://sigmanortec.ro/en/llms/p/1709.md
- Price: 13.29 RON
- Availability: In stock; 1-2 zile
- Reference: 9595 · EAN: 5942111670510
- Specifications: Type: Amplifier; tension: AD; Power: 0 - 20W; Input Voltage: 5 V; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.

XH-A156 audio amplifier module, based on the PAM8403 chip, with 4 channels and an output power of 4x3W. Powered by 5V DC, output impedance 4-8 ohms, signal-to-noise ratio up to 90dB. Features a dual input with two 3-wire ports (2xGND, L, R), usable with two separate audio sources or one 4-channel source. Dimensions: 46 x 29 x 13mm.

### Audio amplifier module, 1 channel, 60W, 4-8ohm, TPA3118, 8-24VDC, digital
- Page: https://sigmanortec.ro/en/audio-amplifier-module-1-channel-60w-4-8ohm-tpa3118-8-24vdc-digital
- Details: https://sigmanortec.ro/en/llms/p/1718.md
- Price: 21.65 RON
- Availability: In stock; 1-2 zile
- Reference: 9610 · EAN: 5944403291786
- Specifications: Type: Amplifier; tension: AD; Power: Over 20W; Supply Voltage: 8; Maximum Input Voltage: 24

Mono audio amplifier module based on the TPA3118 in PBTL configuration, with an output power of up to 60W. It operates on a supply voltage of 8-24VDC and is compatible with 4-8 ohm speakers (8 ohm recommended). It features low noise and distortion, connection via dedicated pads (optional connectors on the PCB) and dimensions of 46 x 35mm, suitable for speakers, subwoofers or ceiling speakers.

### DIY Bluetooth speaker kit, USB, 2 channels, with case, 5V
- Page: https://sigmanortec.ro/en/diy-bluetooth-speaker-kit-usb-2-channels-with-case-5v
- Details: https://sigmanortec.ro/en/llms/p/1765.md
- Price: 85.82 RON
- Availability: In stock; 1-2 zile
- Reference: 9656 · EAN: 5945107580749
- Specifications: Type: Amplifier; tension: AD; Power: 0 - 20W; Input Voltage: 5 V; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.

DIY set for assembling a functional Bluetooth speaker, ideal for learning soldering and electronic assembly. Includes two 3W 4Ohm 2-channel speakers, plays music via Bluetooth or directly from USB, has LEDs that pulsate to the rhythm of the music, transparent acrylic housing is mounted with screws, IR remote control for remote control.
Set for assembling a functional bluetooth speaker, with two speakers and LEDs that light up in tune with the music.
It uses two 3W and 4Ohm speakers and can play music even from USB memory sticks. The case is made of acrylic panels that are joined with screws.

### Audio amplifier kit, DIY, TPA3116D2, 50Wx2, 100Wx1, 2.1, HiFi, with case
- Page: https://sigmanortec.ro/en/audio-amplifier-kit-diy-tpa3116d2-50wx2-100wx1-21-hifi-with-case
- Details: https://sigmanortec.ro/en/llms/p/1795.md
- Price: 159.10 RON
- Availability: In stock; 1-2 zile
- Reference: 9684 · EAN: 5947378746190
- Specifications: Type: Amplifier; tension: AD; Power: Over 20W

HiFi 2.1 amplifier for DIY projects, offers 2x50W stereo and 100W on subwoofer for clear sound and powerful bass. Based on TPA3116D2 with high efficiency and low noise, includes NE5532 op-amp and AUX input for quick connection. Transparent acrylic housing highlights the electronics and integrates easily into any setup.
The TPA3116D2 is a HIFI 2.1 audio amplifier with superior sound quality, offering an authentic and dynamic audio experience. With two stereo channels of 50W each and a subwoofer channel of 100W, this amplifier ensures a clear and powerful reproduction of low, medium and high frequencies.

### Miniature amplifier module, PAM8403, 2.2-5V
- Page: https://sigmanortec.ro/en/miniature-amplifier-module-pam8403-22-5v
- Details: https://sigmanortec.ro/en/llms/p/1796.md
- Price: 3.58 RON
- Availability: In stock; 1-2 zile
- Reference: 9685 · EAN: 5941289792963
- Specifications: Type: Amplifier; tension: AD; Power: 0 - 20W; Supply Voltage: 2.2; Maximum Input Voltage: 5

Compact stereo amplifier module based on the PAM8403 chip. Delivers 2 x 3W into 4 Ohm speakers with efficiency up to 90%. Operates at 2.2-5 VDC and can be powered from Li-Ion batteries or USB. Small dimensions of 21 x 18 mm make it suitable for DIY projects and portable devices where space is limited.

### 2-channel amplifier module, XH-M543, TPA3116D2, 120Wx2, 12-24V
- Page: https://sigmanortec.ro/en/2-channel-amplifier-module-xh-m543-tpa3116d2-120wx2-12-24v
- Details: https://sigmanortec.ro/en/llms/p/1798.md
- Price: 41.93 RON
- Availability: In stock; 1-2 zile
- Reference: 9687 · EAN: 5947724890010
- Specifications: Type: Amplifier; tension: AD; Power: Over 20W; Supply Voltage: 12; Maximum Input Voltage: 24; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.

Stereo amplifier module XH-M543 based on the TPA3116D2, 2 channels, output power 2x120W at 24VDC and 2x50W at 12VDC. Supply voltage DC 12-24V, efficiency over 90%, SNR 100dB. Audio input via a 3-pin XH2.54 connector, cable included. Separate volume potentiometers per channel. Dimensions 92x68mm. No reverse-polarity or short-circuit protection.

### Sound playback module, Playback, with 5W amplifier, 8M memory, UART, DY-SV5W, SD Card
- Page: https://sigmanortec.ro/en/sound-playback-module-playback-with-5w-amplifier-8m-memory-uart-dy-sv5w-sd-card
- Details: https://sigmanortec.ro/en/llms/p/1842.md
- Price: 38.90 RON
- Availability: Out of stock
- Reference: 9721 · EAN: 5949462584268

DY-SV5W smart sound playback module with 5W Class D amplifier for 4ohm 3-5W speakers. Plays MP3 and WAV from 8Mbyte Flash memory or SD card, controlled via UART, I/O or one-line. 24-bit DAC, 85dB SNR, 5VDC supply, 3.5mm jack output, file update via Micro USB. Dimensions 35x35x4.5mm.

### Amplifier module XH-M573, TPA3116D2, 100W, 2.1 channels
- Page: https://sigmanortec.ro/en/amplifier-module-xh-m573-tpa3116d2-100w-21-channels
- Details: https://sigmanortec.ro/en/llms/p/1884.md
- Price: 106.41 RON
- Availability: In stock; 1-2 zile
- Reference: 9751 · EAN: 5940701928348
- Specifications: Type: Amplifier; tension: AD; Power: Over 20W

2.1 digital amplifier on TPA3116D2, ideal for compact audio projects, powers two stereo speakers and a subwoofer for powerful and balanced sound. It has volume, bass and stereo level adjustment, operates at 10-18V DC, offers audio input via AUX 3.5 mm or 3-pin connector, compatible with 4-8 ohm speakers.
XH-M573 amplifier module using TPA3116D2 IC, This is a 2.1 digital amplifier, designed to provide an audio solution with a 2.1 channel configuration, capable of powering two stereo speakers with 80W each and a subwoofer with 100W, thus ensuring a deep and well-balanced audio experience. This amplifier module features total volume, bass and stereo adjustment.

### Sound playback module, Playback, with 5W amplifier, 8M memory, UART, DY-SV8F
- Page: https://sigmanortec.ro/en/sound-playback-module-playback-with-5w-amplifier-8m-memory-uart-dy-sv8f
- Details: https://sigmanortec.ro/en/llms/p/1924.md
- Price: 44.67 RON
- Availability: In stock; 1-2 zile
- Reference: 8014 · EAN: 5941835418491
- Specifications: Power: 0 - 20W

DY-SV8F sound playback module for electronic projects, offering MP3/WAV playback controlled via UART, I/O or One-line. Includes a 5W class D amplifier for 4 ohm 3-5W speakers, integrated 8MB flash memory (no SD card), file updates via Micro USB and a 3.5mm audio jack output. Power supply 5VDC, operating temperature -20~85C, dimensions 40x40x4.5mm.

### Digital amplifier module XH-M544, TPA3116, Mono, 150W, 12-24VDC
- Page: https://sigmanortec.ro/en/digital-amplifier-module-xh-m544-tpa3116-mono-150w-12-24vdc
- Details: https://sigmanortec.ro/en/llms/p/1985.md
- Price: 39.06 RON
- Availability: Out of stock
- Reference: 9801 · EAN: 5947811953734
- Specifications: Type: Amplifier; tension: AD; Power: Over 20W; Supply Voltage: 12; Maximum Input Voltage: 24

Digital mono amplifier module XH-M544 with TPA3116D2 chip, Class D, output power up to 150W. Powered by 12-24VDC, signal-to-noise ratio of 100dB. Features an integrated volume potentiometer (180 degree rotation, do not force), a generous heatsink, and 3mm mounting holes at the corners. Dimensions: 77 x 73 x 16mm. Suitable for DIY audio projects and home or vehicle audio systems.

### Audio speaker protection module, power-on delay, 12-18VAC, 300W
- Page: https://sigmanortec.ro/en/audio-speaker-protection-module-power-on-delay-12-18vac-300w
- Details: https://sigmanortec.ro/en/llms/p/2109.md
- Price: 71.63 RON
- Availability: In stock; 1-2 zile
- Reference: 9941 · EAN: 5945332836758
- Specifications: Power: Over 20W; Maximum Controlled Power: 300 W; Input Voltage: 12-18VAC; Input Voltage Type: AC

Speaker protection module (ref. 9941), model UPC1237, with power-on delay of about 3 seconds and DC detection at about 1V. Operates at 12-18VAC, requires a separate power supply, supports 2 channels x 300W, uses dual Omron relays in parallel connection. LED indicates operating status. Not compatible with BTL circuits.

### Speaker protection module, delayed start, 12-15VAC, stereo
- Page: https://sigmanortec.ro/en/speaker-protection-module-delayed-start-12-15vac-stereo
- Details: https://sigmanortec.ro/en/llms/p/2110.md
- Price: 26.63 RON
- Availability: Out of stock
- Reference: 9942 · EAN: 5946597873687
- Specifications: Input Voltage: 12-15VAC; Input Voltage Type: AC

Stereo speaker protection module with delayed start (~3 seconds) and decoupling upon detection of DC voltage (~1V). Uses a 15A relay, two channels (R and L), status LED. Requires independent 12-15VAC power supply, cannot share power with other circuits. Dimensions 65x40mm. For BTL circuits, two modules per channel are required. Reference 9942.

### Audio Module VS1053B, MP3, 5V
- Page: https://sigmanortec.ro/en/audio-module-vs1053b-mp3-5v
- Details: https://sigmanortec.ro/en/llms/p/2259.md
- Price: 82.24 RON
- Availability: In stock; 1-2 zile
- Reference: 88096 · EAN: 5945583389119
- Specifications: Input Voltage: 5 V; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.

VS1053B audio module for Arduino and other development boards, 5V DC power supply. Decodes MP3, OGG, AAC, WMA and MIDI, with stereo and headphone output. Supports OGG recording via built-in microphone or line-in, SD card slot for direct playback, SPI communication. Integrated LDO regulators AMS1117 3.3V/2.8V, 12.288 MHz crystal. Dimensions: 46 x 40 mm.

### Power amplifier filter module, 12A, 1200W
- Page: https://sigmanortec.ro/en/power-amplifier-filter-module-12a-1200w
- Details: https://sigmanortec.ro/en/llms/p/1918.md
- Price: 71.85 RON
- Availability: In stock; 1-2 zile
- Reference: 9776 · EAN: 5949543947333
- Specifications: Nominal Current: 12 A; Maximum Controlled Power: 1200 W

Filter and rectification module for dual power amplifiers, supports 12A and 1200W. Works in single or dual configuration, with four rectifier bridges and 20 LOW ESR capacitors rated 25V connected in series. Maximum AC voltage 50V x2, maximum current 6A x2. Large terminals and protective caps for secure connection. Dimensions: 119 x 51 x 18mm.

### Led audio indicator kit LM3915
- Page: https://sigmanortec.ro/en/led-audio-indicator-kit-lm3915
- Details: https://sigmanortec.ro/en/llms/p/262.md
- Price: 17.45 RON
- Availability: In stock; 1-2 zile
- Reference: 33075 · EAN: 5941113661427

DIY VU meter kit based on the LM3915, showing audio signal level via 10 LEDs that light up progressively according to volume. Comes with unsoldered components for assembly, operates at 9-12VDC, with a 62 x 57mm PCB and a socket for the IC. LEDs may be round or rectangular depending on the batch. The IC has an orientation marking that must match the PCB.

### 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.

### Siren module, 120dB, 6-15VDC
- Page: https://sigmanortec.ro/en/siren-module-120db-6-15vdc
- Details: https://sigmanortec.ro/en/llms/p/2266.md
- Price: 18.66 RON
- Availability: In stock; 1-2 zile
- Reference: 88130 · EAN: 5942211142344
- Specifications: tension: AD

Compact siren module for alarm and anti-intrusion systems, model QSI-4840. Power supply 6-15VDC, sound level up to 120dB (sound index 110dB at 12VDC), frequency 2.8 ± 0.5kHz, current consumption 750 mA at 12VDC. Dimensions 39 x 47 x 23 mm, suitable for integration into audible warning systems.

### Active Buzzer Module with LED, for PixHawk PX4, alarm, 3.3V
- Page: https://sigmanortec.ro/en/active-buzzer-module-with-led-for-pixhawk-px4-alarm-33v
- Details: https://sigmanortec.ro/en/llms/p/2211.md
- Price: 29.43 RON
- Availability: In stock; 1-2 zile
- Reference: 88050 · EAN: 5946683990533
- Specifications: Input Voltage: 3.3 V

Active buzzer module with red LED for PixHawk PX4, used as an alarm for low battery, failsafe or signal loss. Powered at 3.3V, includes a button for manual shutdown, connects via the Buzzer and Switch interfaces. Dimensions 15 x 38mm, weight 7g. Helps locate the drone after an uncontrolled landing. Reference 88050.

### Alarm siren with light and sound, 120dB, 5-12V
- Page: https://sigmanortec.ro/en/alarm-siren-with-light-and-sound-120db-5-12v
- Details: https://sigmanortec.ro/en/llms/p/2184.md
- Price: 23.23 RON
- Availability: In stock; 1-2 zile
- Reference: 88023 · EAN: 5949663991094
- Specifications: Input Voltage: 5-12 V; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.

Alarm siren module with flashing light and 120dB acoustic signal, for anti-burglary systems and automations. Power supply 5-12V DC, flash frequency 150 times/min, ABS housing, weight 75g, dimensions 122 x 72 x 43 mm. Powered via red wire (positive) and black wire (negative), typically connected through a relay; do not power with more than 12V.

### 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.

### Speaker Buzzer 3-24V, 100dB
- Page: https://sigmanortec.ro/en/speaker-buzzer-3-24v-100db
- Details: https://sigmanortec.ro/en/llms/p/722.md
- Price: 4.19 RON
- Availability: In stock; 1-2 zile
- Reference: 33163 · EAN: 5942941745624
- Specifications: Supply Voltage: 3; Maximum Input Voltage: 24; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.

Piezo buzzer SFM-27-W for warnings and signaling in electronic projects and industrial applications. Power supply 3-24V DC, continuous sound up to 100dB at 12V/30cm, diameter 3cm, current consumption approximately 15mA at 12V, resonance frequency 2.5±0.5KHz. Operating temperature -20...+45C.

### Alarm siren 12V, 120dB
- Page: https://sigmanortec.ro/en/alarm-siren-12v-120db
- Details: https://sigmanortec.ro/en/llms/p/719.md
- Price: 20.09 RON
- Availability: In stock; 1-2 zile
- Reference: 33451 · EAN: 5949481699585
- Specifications: Input Voltage: 12 V; Input Voltage Type: “DC” in Romanian can mean **“de ce”**, which translates to **“why”** in English.

Alarm siren powered at 12VDC, with a sound level of 120dB, intended for anti-burglary systems. The sound frequency is 3.8kHz +-10%, with a transmission rate of 3Hz for a distinct signal. It has a diameter of 54mm and a height of 48mm, a compact format easy to integrate into security projects.

### 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.

### Buzzer mode active
- Page: https://sigmanortec.ro/en/buzzer-mode-active
- Details: https://sigmanortec.ro/en/llms/p/346.md
- Price: 3.63 RON
- Availability: In stock; 1-2 zile
- Reference: 33162 · EAN: 5942920248917

Active buzzer module (ref. 33162), compatible with Arduino and other development boards. Produces a continuous sound when supplied with 5V and can be controlled directly from a digital pin. Operates on LOW level activation, suitable for alarms and sound notifications.

### Passive Buzzer Mode
- Page: https://sigmanortec.ro/en/passive-buzzer-mode
- Details: https://sigmanortec.ro/en/llms/p/347.md
- Price: 5.03 RON
- Availability: Out of stock
- Reference: 22152 · EAN: 5949906098757

Passive buzzer module that requires a square wave signal with a frequency of 2k to 5k to operate. It can play varied tones or melodies using the Arduino tone function. Supply voltage 3.3-5VDC, dimensions 33 x 13 mm. It differs from an active buzzer, which generates sound directly when voltage is applied.

### LED warning light, red, 12V
- Page: https://sigmanortec.ro/en/led-warning-light-red-12v
- Details: https://sigmanortec.ro/en/llms/p/307.md
- Price: 28.23 RON
- Availability: In stock; 1-2 zile
- Reference: 33387 · EAN: 5943606431500
- Specifications: Input Voltage: 12 V

Red LED strobe light for clear visual signaling of moving or working equipment, 12VDC power supply, flashing mode for increased visibility, compact body 73 x 43.5 mm without base. Quick to mount with included kit, screws and two bases, one with self-adhesive pad and one for screw fixing.
Strobe light (beacon), red color, 12V power supply. The kit includes screws and 2 bases, one with a self-adhesive pad, the other for screw mounting. The light is ideally used as a visual signal for moving equipment or equipment in operation.
Specifications:
Power supply voltage: 12VDC
Light source: LED
Light mode: flashing
Dimensions mm: 73 x 43.5mm (without base)

### 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.

### Active buzzer 5v
- Page: https://sigmanortec.ro/en/active-buzzer-5v
- Details: https://sigmanortec.ro/en/llms/p/72.md
- Price: 3.82 RON
- Availability: In stock; 1-2 zile
- Reference: 22198 · EAN: 5940353170065
- Specifications: tension: AD; Input Voltage: 5 V

Active buzzer 5V (ref. 22198, EAN 5940353170065) for acoustic signaling in electronic projects. Emits sound immediately upon application of DC voltage, operates at 5V, does not require a PWM signal or complex driver. Voltage: DC, Input Voltage: 5V. Easily integrates with microcontrollers and 5V power sources, suitable for alarms, confirmations and sound notifications.

### Passive buzzer 5v
- Page: https://sigmanortec.ro/en/passive-buzzer-5v
- Details: https://sigmanortec.ro/en/llms/p/73.md
- Price: 1.45 RON
- Availability: In stock; 1-2 zile
- Reference: 33442 · EAN: 5943728665654
- Specifications: tension: AD; Input Voltage: 5 V

Passive buzzer rated at 5V, with 5 V input voltage and DC supply. Generates variable tones via PWM, offering fast response and clear sound. Compact size for easy integration, mounts via pins on breadboard or PCB. Suitable for audio signaling in Arduino projects, automation and electronics.

### Active piezoelectric buzzer 3-24V HND-2312
- Page: https://sigmanortec.ro/en/active-piezoelectric-buzzer-3-24v-hnd-2312
- Details: https://sigmanortec.ro/en/llms/p/74.md
- Price: 8.47 RON
- Availability: In stock; 1-2 zile
- Reference: 33164 · EAN: 5942208136028
- Specifications: tension: AD; Input Voltage: 3 - 24 V; Model: HND-2312

Active piezoelectric buzzer HND-2312, DC supply, input voltage 3-24 V. Operates directly at this voltage without an external circuit, providing a clear and stable sound for audible signalling. Low power consumption, suitable for battery or industrial power sources. Compact format, easy to integrate onto panels and enclosures, useful for alarms, status confirmations and simple warnings in electronic projects and automation.

### 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.