Adafruit
Medium Surface Transducer with Wires - 4 Ohm 3 Watt
A medium surface transducer that turns any flat surface — tables, walls, panels — into a speaker. Unlike traditional cone speakers, a voice coil wrapped arou...
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A medium surface transducer that turns any flat surface — tables, walls, panels — into a speaker. Unlike traditional cone speakers, a voice coil wrapped around a metal rod causes vibration that transfers directly to the surface it's pressed against, producing surprisingly clear sound from the surface itself.
The transducer has a heavy body so it can simply be placed top-down on a surface. It operates at 4 Ω impedance and 3 W, making it compatible with common Class D audio amplifier breakouts. Pre-soldered wires are included for easy connection.
Key Features
- Surface-Driven Audio – Turns any flat surface into a speaker
- Pre-Soldered Wires – Ready to connect to an audio amplifier
- Heavy Body – Stays in place on surfaces without mounting
Specifications
- Diameter – 28 mm
- Impedance – 4 Ω
- Power Rating – 3 W
Ideal For
- Interactive audio installations
- Hidden speaker projects
- Directional sound experiments (e.g. mounted in a cup or tube)
- Pairing with Class D audio amplifier breakouts
Package Contents
- 1× Medium surface transducer with pre-soldered wires
Jargon buster
Plain-language definitions for the technical terms used above.
- Impedance
- Impedance is the total opposition a component or circuit presents to alternating current, measured in ohms, combining resistance with frequency-dependent reactance. It appears in many contexts, such as matching a speaker's impedance (for example 4 ohm or 8 ohm) to an amplifier or the input and output impedance of signal circuits, and a correct match helps avoid weak signals, distortion or damage.
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