Visaton FR 9.15 4 Ohm, 4 x 6 Inch, Full Range Oval Speaker
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Product photographs and manufacturer drawings. Images are not to scale.
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Its 4 Ω load and moisture-resistant cone suit compact vehicle audio applications. The oval format has different horizontal and vertical dispersion.
Typical applications
- Vehicle audio installations
- Motorhomes
- Trams and other rail vehicles
Full specifications
| Rated power | 15 W |
|---|---|
| Maximum power | 30 W |
| Nominal impedance | 4 Ω |
| Frequency response (−10 dB) | 75–16000 Hz |
| Mean sound pressure level | 85 dB (1 W/1 m) |
| Opening angle (-6 dB) | 147°/4000 Hz hor.180°/4000 Hz ver. |
| Excursion limit | ±1.5 mm |
| Resonance frequency fs | 120 Hz |
| Magnetic induction | 0.9 T |
| Magnetic flux | 170 µWb |
| Height of front pole-plate | 3 mm |
| Voice coil diameter | 20 mm |
| Height of winding | 5 mm |
| Cut-out | 146 x 87 mm (oval) |
| Net weight | 0.277 kg |
| D.C. resistance Rdc | 3.5 Ω |
| Mechanical Q factor Qms | 8.9 |
| Electrical Q factor Qes | 2.29 |
| Total Q factor Qts | 1.82 |
| Equivalent volume Vas | 2.9 l |
| Effective piston area Sd | 79 cm² |
| Dynamically moved mass Mms | 4.6 g |
| Force factor Bxl | 2.3 Tm |
| Inductance of the voice coil L | 0.3 mH |
| Terminals | 4.8 x 0.8 mm (+)/2.8 x 0.8 mm (-) |
| Temperature range | –25 to 70 °C |
Dimensions and drawings

Dimension drawing · Open original image
Installation and cabinet guidance
Allow for a 146 × 87 mm oval panel opening and align all four fixing positions. Consider the speaker’s orientation when planning coverage, as horizontal and vertical dispersion differ. Optional grilles: 4645 and 4745.
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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