Visaton BF 32 S 4 Ohm, 1.3 Inch, Full Range Speaker
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Product photographs and manufacturer drawings. Images are not to scale.
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The BF 32 S fits speech and music reproduction into a small square frame with four mounting holes. Its black diaphragm suits discreet installations behind a grille, while a neodymium magnet keeps the assembly compact. This 4 Ω version handles 2 W rated power and weighs 28 g.
Typical applications
- Displays
- Information terminals
- Compact electronic devices
Full specifications
| Rated power | 2 W |
|---|---|
| Maximum power | 5 W |
| Nominal impedance | 4 Ω |
| Frequency response (−10 dB) | 150–20000 Hz |
| Mean sound pressure level | 78 dB (1 W/1 m) |
| Resonance frequency fs | 280 Hz |
| Voice coil diameter | 20 mm |
| Height of winding | 3 mm |
| Cut-out | 31.5 mm |
| Net weight | 28 g |
| Terminals | Solder lugs |
| Temperature range | –25 to 70 °C |
| Frame | 32 × 32 mm |
| Overall depth | 15 mm |
| Fixing pitch | 24.5 mm |
| Diaphragm colour | Black |
Dimensions and drawings

Dimension drawing · Open original image
Installation and cabinet guidance
Allow for a 31.5 mm opening, 32 mm square frame and 24.5 mm fixing pitch. Leave room for the 15 mm overall depth and solder lugs. Keep screw heads and the front grille clear of the surround.
Mount on a rigid panel with a continuous seal around the frame to prevent air leaks and rattles. Keep the cone and surround clear of the grille and internal parts.
Use an amplifier suitable for the 4 Ω load and follow the polarity marks. Solder without prolonged heating, insulate the joints and secure the wires so they cannot touch the cone or pull on the lugs.
Test the driver in the intended enclosure before fixing the cabinet design. Keep the rear acoustic space clear and check low-frequency cone travel at the intended operating level; a small driver’s usable bass depends on the enclosure and required output.
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