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