Visaton FR 12 4 Ohm, 5 Inch, Full Range Speaker
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The FR 12 combines a shallow profile, inverted surround and 15 W rated power for vehicle audio and electronic equipment. This 4 Ω version is useful where space behind the mounting panel is limited.
Typical applications
- Vehicle audio installations
- Electronic instruments
- Equipment monitoring
Full specifications
| Rated power | 15 W |
|---|---|
| Maximum power | 40 W |
| Nominal impedance | 4 Ω |
| Frequency response (−10 dB) | 70–18000 Hz |
| Mean sound pressure level | 85 dB (1 W/1 m) |
| Opening angle (-6 dB) | 79°/4000 Hz |
| Excursion limit | ±2.5 mm |
| Resonance frequency fs | 110 Hz |
| Magnetic induction | 0.8 T |
| Magnetic flux | 150 µWb |
| Height of front pole-plate | 3 mm |
| Voice coil diameter | 20 mm |
| Height of winding | 4.5 mm |
| Cut-out | 114 mm |
| Net weight | 0.284 kg |
| D.C. resistance Rdc | 3.4 Ω |
| Mechanical Q factor Qms | 5.61 |
| Electrical Q factor Qes | 2.8 |
| Total Q factor Qts | 1.87 |
| Equivalent volume Vas | 8.7 l |
| Effective piston area Sd | 87 cm² |
| Dynamically moved mass Mms | 3.8 g |
| Force factor Bxl | 1.7 Tm |
| Inductance of the voice coil L | 0.1 mH |
| Terminals | 4.8 x 0.8 mm (+)/2.8 x 0.8 mm (-) |
| Temperature range | −40 to 70 °C |
Dimensions and drawings

Shared drawing · labelled 8 Ω · Open original image
Installation and cabinet guidance
Allow for a 114 mm panel opening and 30.5 mm speaker depth, plus space for the terminals and wiring. Match the fixing positions before drilling. Optional grille: FR 12, part 2062.
Use an amplifier suitable for the 4 Ω load and observe terminal polarity. For a 100 V line system, connect through a suitable line transformer; do not connect the driver directly to the line.
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