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Visaton FR 87 4 Ohm, 3.4 Inch, Full Range Speaker

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FR 87 · 4 Ω · part 4630 — Product photo

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FR 87 · 4 Ω · part 4630 — Product photo Product photo FR 87 · 4 Ω · part 4630 — Dimension drawing Dimension drawing FR 87 · 4 Ω · part 4630 — Response and impedance Response and impedance FR 87 · 4 Ω · part 4630 — Directivity pattern Directivity pattern

Product photographs and manufacturer drawings. Images are not to scale.

FR 87 · 4 Ω · part 4630 — Product photo

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Quantity discounts

Part number: 4630

An 8.7 cm full-range driver for speech and music in vehicles, electronic instruments and monitoring equipment.

Nominal size
8.7 cm / 3.4 inch
Impedance
4 Ω
Rated power
15 W
Cut-out
80 mm
Sensitivity
85 dB (1 W/1 m)
Resonance
137 Hz
£8.95 Business price, ex VAT £10.74 inc VAT at 20%
Maximum quantity available reached.

Description

The FR 87 uses a moisture-resistant cone and metal basket. Its 4 Ω impedance and 15 W rated power suit compact integrated audio systems.

Typical applications

  • Vehicle audio installations
  • Electronic instruments
  • Equipment monitoring
Full specifications
FR 87 · 4 Ω
Rated power15 W
Maximum power20 W
Nominal impedance4 Ω
Frequency response (−10 dB)100–20000 Hz
Mean sound pressure level85 dB (1 W/1 m)
Opening angle (-6 dB)143°/4000 Hz
Excursion limit±2 mm
Resonance frequency fs137 Hz
Height of front pole-plate3 mm
Voice coil diameter15 mm
Height of winding4.3 mm
Cut-out80 mm
Net weight0.21 kg
D.C. resistance Rdc3.5 Ω
Mechanical Q factor Qms6.4
Electrical Q factor Qes1.56
Total Q factor Qts1.25
Equivalent volume Vas1.3 l
Effective piston area Sd37 cm²
Dynamically moved mass Mms2 g
Force factor Bxl2.1 Tm
Inductance of the voice coil L0.2 mH
Terminals4.8 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
FR 87 · 4 Ω · part 4630 — Dimension drawing

Dimension drawing · Open original image

Installation and cabinet guidance

Allow for an 80 mm panel opening and align the slotted fixing holes before drilling. Optional grille: FR 87, part 4639. Check the operating-temperature limits before fitting in a location exposed to extreme heat or cold.

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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