3W 8 Ohm Speaker – Compact Audio Output for DIY Electronics
3W 8 Ohm Speaker – Compact Audio Output for DIY Electronics
The 3W 8 Ohm speaker is a small, versatile audio transducer designed for hobbyist electronics, prototyping, and embedded sound projects. It delivers clear audio output at moderate volumes, making it suitable for alerts, music playback, and voice prompts in microcontroller-based builds. Its standard 8 Ohm impedance ensures broad compatibility with common audio amplifiers.
Key Specifications
| Specification | Value |
|---|---|
| Power Rating | 3 Watts (RMS) |
| Impedance | 8 Ohms |
| Diameter | 50 mm (approx.) |
| Frequency Response | 100 Hz – 15 kHz |
| Magnet Type | Neodymium |
| Voice Coil | 13 mm diameter |
What You Can Build With This
- Portable Bluetooth speaker using an amplifier module
- Arduino-based MP3 player with DFPlayer or similar
- Custom doorbell or alarm system with recorded audio
- Embedded voice assistant with Raspberry Pi and TTS
Compatibility
Works with any microcontroller board that can drive audio through an external amplifier, such as Arduino Uno, ESP32, Raspberry Pi, or dedicated audio modules like DFPlayer Mini. Direct connection to GPIO pins is possible for simple tones, but an amplifier or transistor driver is recommended for full power and quality.
Wiring Notes
Connect the speaker terminals to the output of a 3W or lower amplifier module (e.g., PAM8403). If driving from a microcontroller pin, use a 100 µF electrolytic capacitor in series to block DC and protect the coil. Keep wire runs short to minimize interference.
Why Buy from Compoden
Every component is sourced from verified suppliers and tested for compatibility before listing. We've spent 10 years building projects for makers, schools, and institutions across India. Ships from Bengaluru in 3-5 days. If defective on arrival, replace within 7 days.
Is this compatible with Arduino Uno?
Yes, when used with an external amplifier or a transistor driver. Direct GPIO output may produce weak sound and risk damage.
What voltage is required?
The speaker itself does not have a voltage rating; it's driven by an audio signal. The accompanying amplifier typically needs 3.3V to 5V DC.
Can I use this for a loud alarm?
At 3W, it produces moderate volume suitable for indoor alerts. For louder applications, consider a higher‑power speaker.
📦 Free Setup Handoff Document Included
Every Compoden order includes a free setup handoff document — step-by-step instructions to get your component working within minutes. Download it via QR code on your package. The handoff document is also trained to help you troubleshoot the majority of problems.
Ask Soldr above what you can build with this — it knows every Compoden kit this part appears in.
Shipping Information
- Prepaid Orders: ₹75 for orders up to ₹999, FREE shipping above ₹999
- COD Orders: ₹125 shipping + ₹50 COD fee = ₹175 total
- Delivery Timeline: Dispatch in 1-2 days, delivery in 2-7 days depending on location
Returns & Warranty
- 7-Day Return: Manufacturing defects only (approval required)
- Warranty: 7 days from delivery
- Non-Returnable: Batteries, consumables, cut wires, clearance items