Visaton FRS 8 4 Ohm, 3.3 Inch, HiFi Full Range Speaker

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The FRS 8 uses a metal basket and a moisture-resistant cone. This is the 4 Ω model, part 2003. Its compact format suits surround effects and small subwoofer/satellite systems; a moisture-resistant cone does not make the complete driver waterproof.
Typical applications
- Compact HiFi and surround-effect speakers
- Monitoring audio in electronic equipment
- Model construction
- Ceiling speakers in buses and railway carriages
Full specifications
| Rated power | 30 W |
|---|---|
| Maximum power | 50 W |
| Nominal impedance | 4 Ω |
| Frequency response (−10 dB) | 100–20000 Hz |
| Mean sound pressure level | 82 dB (1 W/1 m) |
| Opening angle (−6 dB) | 180°/4000 Hz |
| Excursion limit | ±2.5 mm |
| Resonance frequency (fs) | 120 Hz |
| Magnetic induction | 0.8 T |
| Magnetic flux | 200 µWb |
| Height of front pole-plate | 4 mm |
| Voice coil diameter | 20 mm |
| Height of winding | 4.5 mm |
| Cut-out diameter | 73 mm |
| Net weight | 0.28 kg |
| DC resistance (Rdc) | 3.5 Ω |
| Mechanical Q factor Qms | 3.61 |
| Electrical Q factor Qes | 0.85 |
| Total Q factor Qts | 0.69 |
| Equivalent volume Vas | 1 l |
| Effective piston area Sd | 31 cm² |
| Dynamically moved mass Mms | 2.5 g |
| Force factor Bxl | 2.2 T m |
| Inductance of the voice coil L | 0.4 mH |
| Terminals | 4.8 x 0.8 mm (+)/2.8 x 0.8 mm (-) |
| Temperature range | –25 to 70 °C; contact us for use in extreme temperatures |
Dimensions and drawings
Installation and cabinet guidance
Allow for a 73 mm panel opening and match the fixing slots before drilling. Leave room behind the speaker for the magnet, terminals and wiring. Optional grille 1138 suits rear mounting; grille 4634 suits front mounting.
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