FR 87 - 4 Ohm
Art. No. 4630
8.7 cm (3.4") fullrange speaker with balanced frequency response and high efficiency. For speech and music reproduction in electronic divices and vehicles.
Typical applications:
- Control speaker for electronic devices
- Vehicles
- Electronic musical instruments
Attributes:
- Moisturised cone
- Metal basket
Technical Data
| Rated power | 10 W |
|---|---|
| Maximum power | 15 W |
| Nominal impedance Z | 4 Ohm |
| Frequency response | 100–20000 Hz |
| Mean sound pressure level | 85 dB (1 W/1 m) |
|---|---|
| Opening angle (-6 dB) | 143°/4000 Hz |
| Excursion limit | +/−2 mm |
| Resonance frequency fs | 137 Hz |
| Height of front pole-plate | 3 mm |
| Voice coil diameter | 15 mm |
| Height of winding | 4,3 mm |
| Cutout diameter | 80 mm |
| Net weight | 0,21 kg |
| D.C. resistance Rdc | 3,5 Ohm |
| Mechanical Q factor Qms | 6,4 |
| Electrical Q factor Qes | 1,56 |
| Total Q factor Qts | 1,25 |
| Equivalent volume Vas | 1,3 l |
| Effective piston area Sd | 37 cm² |
| Dynamically moved mass Mms | 2 g |
| Force factor Bxl | 2,1 Tm |
| Inductance of the voice coil L | 0,2 mH |
| Temperature range | −25 ... 70 °C |
Show all data
sketch
frequency- and impedance response
directivity pattern
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