Written by 
Product Overview
Elevate your audio projects with our 2‑piece Mini Speaker Kit – a compact, high‑performance 3W, 4Ω 40mm loudspeaker set designed for Arduino, Raspberry Pi, and DIY electronics enthusiasts. Each speaker measures 5 cm (diameter) with a 4 cm trumpet‑shaped housing, delivering crisp sound in a small footprint.
Key Highlights
- Powerful 3‑watt output for clear, distortion‑free audio
- Low‑impedance 4 Ω design matches most microcontroller audio shields
- Compact 40 mm diameter – perfect for embedded projects and portable devices
- Durable 4‑resistor (4R) internal network for reliable performance
- Ready‑to‑use trumpet‑style housing for easy mounting and wiring
- Includes two units – ideal for stereo, dual‑channel, or redundancy setups
- Compatible with Arduino kits, ESP32, STM32, and other microcontrollers
- Lightweight and space‑saving – fits in tight PCB spaces and handheld gadgets
Technical Specifications
- Power: 3 W RMS
- Impedance: 4 Ω
- Driver Size: 40 mm
- Diameter: 5 cm (outer), 4 cm (inner trumpet)
- Frequency Response: 200 Hz – 20 kHz (typical)
- Weight: 15 g per speaker
- Connector: 2 mm jack or screw terminals (included)
- Packaging: 2 pcs per unit, protective case
Applications & Compatibility
These mini speakers are engineered for a wide range of projects:
- Arduino audio modules and educational kits
- Raspberry Pi sound projects and IoT devices
- Portable gaming consoles and handheld gadgets
- Robot and drone sound alerts
- DIY home automation and smart home speakers
- Prototype boards and breadboard audio experiments
Why Choose Our Mini Speakers
When you select our 3W 4Ω 40mm mini speakers, you’re investing in reliability, clarity, and convenience. The trumpet design ensures optimal acoustic output, while the 4 Ω impedance aligns with standard audio drivers used in Arduino and other microcontroller platforms. Whether you’re building a new prototype or upgrading an existing project, these speakers deliver professional sound in a tiny package.
Price: Original price was: $ 3.46.$ 2.25Current price is: $ 2.25.