Visaton K 57 FL 8 Ohm, 2.2 Inch, Miniature Speaker
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The K 57 FL is a 5.7 cm miniature speaker with a Mylar diaphragm and a metal basket in a very flat design, made for signal output in machines and equipment where installation depth is limited. The 8 Ω unit handles 1 W rated power, weighs 16.5 g and connects through soldering points on the rear. Its IP65 front-side protection applies when it is built into a sealed enclosure.
Typical applications
- Signal output in machines
- Shallow equipment panels
Full specifications
| Rated power | 1 W |
|---|---|
| Maximum power | 2 W |
| Nominal impedance | 8 Ω |
| Frequency response (−10 dB) | 220–16000 Hz |
| Mean sound pressure level | 83 dB (1 W/1 m) |
| Resonance frequency fs | 350 Hz |
| Voice coil diameter | 14 mm |
| Height of winding | 1.5 mm |
| Cut-out | 52 mm |
| Net weight | 16.5 g |
| Terminals | Solder joints |
| Protective system | IP65 — front side in a sealed enclosure |
| Temperature range | –25 to 70 °C |
Dimensions and drawings

Dimension drawing · Open original image
Installation and cabinet guidance
Allow for a 52 mm opening and the 57 mm frame, with about 9 mm behind the panel for the body and solder points. Seal the rim to the panel so the front-side protection is effective.
Solder to the rear points, 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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