Adafruit
Adafruit STEMMA Speaker - Plug and Play Audio Amplifier
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The Adafruit STEMMA Speaker combines a Class D audio amplifier with a 1W 8 Ω speaker in one slim, portable package. Connect ground, 3–5V power, and an audio ...
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The Adafruit STEMMA Speaker combines a Class D audio amplifier with a 1W 8 Ω speaker in one slim, portable package. Connect ground, 3–5V power, and an audio signal via the JST-PH STEMMA connector or the alligator/sew-pads — no AC coupling needed, the board handles that for you.
Sound quality is suitable for music, tones, and speech. A small trim pot lets you adjust volume with a screwdriver. The audio input accepts signals up to the supply voltage (3V or 5V peak-to-peak).
Key Features
- Built-In Class D Amplifier – Efficient audio amplification onboard
- 1W 8 Ω Speaker Included – Ready to play audio out of the box
- STEMMA JST-PH Connector – Plug-and-play with 3–5V microcontrollers
- Alligator/Sew Pads – Alternative connection method for Circuit Playground, micro:bit, and wearables
- AC Coupling Built In – No external capacitors needed on the input
- Volume Trim Pot – Adjustable with a small screwdriver
- Slim Form Factor – Compact and portable
Also Consider
- STEMMA Audio Amp – Mono 2.5W Class D (PAM8302) – Higher power amplifier without speaker (BYO speaker)
Ideal For
- Circuit Playground and micro:bit audio projects
- Portable sound effects and music playback
- Interactive displays and exhibits
- Wearable audio devices
Package Contents
- 1× STEMMA Speaker board with built-in amplifier and 1W 8 Ω speaker
Jargon buster
Plain-language definitions for the technical terms used above.
- STEMMA
- A plug-and-cable connection system used on some maker electronics boards to make wiring simpler. If a product uses STEMMA, you need the matching cable or connector type to plug it in without soldering.
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