This compact, general-purpose speaker is great for adding loud, high-fidelity sound that can bring your project to life (or to annoy your friends and family with loud sirens and squawks!). If you have an adequate driver for it, such as a small MOSFET controlled from a microcontroller PWM line, you can really get much more volume and richness than you can from similar-sized low-power speakers and buzzers.

The speaker’s specifications can be found in its datasheet (1MB pdf).

18mm speaker with US quarter for size reference.

Bottom view of the 18mm speaker.

Frequency response curve for the 18mm speaker.

18mm speaker dimensions (in mm).



Size: 18 x 18 x 9 mm
Weight: 3.1 g

General specifications

Rated input power: 2 W
Maximum input power: 2.5 W
Impedance: 4 Ohm


File downloads

18mm speaker datasheet (1MB pdf)
The datasheet for the 18mm speaker.


SKU PL-1258
Brand Pololu

Be The First To Review This Product!

Help other Little Bird Company Pty Ltd users shop smarter by writing reviews for products you have purchased.

Write a product review

More From This Category