Visaton K 20.40 8 Ohm, 0.8 x 1.6 Inch, Miniature Speaker
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The K 20.40 is a rectangular miniature speaker with a UV-resistant plastic basket and four mounting holes, made for voice and signal output in machines and equipment indoors and outdoors. The 8 Ω unit handles 1 W rated power. Its IP64 front-side protection applies when it is built into a sealed enclosure.
Typical applications
- Voice and signal output in machines
- Indoor and outdoor equipment
Full specifications
| Rated power | 1 W |
|---|---|
| Maximum power | 2 W |
| Nominal impedance | 8 Ω |
| Frequency response (−10 dB) | 400–20000 Hz |
| Mean sound pressure level | 79 dB (1 W/1 m) |
| Excursion limit | ± 0.5 mm |
| Resonance frequency fs | 650 Hz |
| Height of front pole-plate | 1 mm |
| Voice coil diameter | 12 mm |
| Cut-out | 38 x 18 mm |
| Net weight | 0.007 kg |
| Terminals | Solder lugs |
| Protective system | IP64 — front side in a sealed enclosure |
| Temperature range | −40 to 85 °C |
Dimensions and drawings

Dimension drawing · Open original image
Installation and cabinet guidance
Allow for a 38 x 18 mm opening and the 40 x 20 mm frame, with four 2.2 mm fixing holes on a 36 x 16 mm pattern. Leave about 8 mm behind the panel for the body and solder lugs.
Seal the frame to the panel so the front-side protection is effective. Solder to the lugs, observe polarity and keep the drive within the 1 W rating from an output stage suitable for the 8 Ω load.
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