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Visaton W 100 S 4 Ohm, 4 Inch, HiFi Woofer

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W 100 S · 4 Ω · part 9020 — Product photo

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W 100 S · 4 Ω · part 9020 — Product photo Product photo W 100 S · 4 Ω · part 9020 — Dimension drawing Dimension drawing W 100 S · 4 Ω · part 9020 — Response and impedance Response and impedance W 100 S · 4 Ω · part 9020 — Directivity pattern Directivity pattern

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

W 100 S · 4 Ω · part 9020 — Product photo

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Part number: 9020

A 10 cm bass-midrange driver for compact hi-fi speakers and the low-midrange of three-way systems.

Nominal size
10 cm / 4 inch
Impedance
4 Ω
Rated power
30 W
Cut-out
94 mm
Sensitivity
86 dB (1 W/1 m)
Resonance
65 Hz
£28.95 Business price, ex VAT £34.74 inc VAT at 20%
Maximum quantity available reached.

Description

The W 100 S pairs a coated paper cone with an elastic rubber surround and a 20 mm voice coil, and its balanced response suits it either to woofer duty in small enclosures or to the low-midrange band of a larger system. This 4 Ω version handles 30 W rated power, resonates at 65 Hz and weighs 0.49 kg.

Typical applications

  • Compact hi-fi speakers
  • Three-way hi-fi speakers (bass/midrange)
  • Subwoofer and satellite systems
Full specifications
W 100 S · 4 Ω
Rated power30 W
Maximum power50 W
Nominal impedance4 Ω
Frequency response (−10 dB)fu–15000 Hz (fu: lower cut-off depends on the cabinet)
Mean sound pressure level86 dB (1 W/1 m)
Opening angle (-6 dB)86°/4000 Hz
Excursion limit±4 mm
Resonance frequency fs65 Hz
Magnetic induction1 T
Magnetic flux250 µWb
Height of front pole-plate4 mm
Voice coil diameter20 mm
Height of winding8 mm
Cut-out94 mm
Net weight0.49 kg
D.C. resistance Rdc3.4 Ω
Mechanical Q factor Qms3.04
Electrical Q factor Qes0.54
Total Q factor Qts0.46
Equivalent volume Vas4.49 l
Effective piston area Sd53 cm²
Dynamically moved mass Mms5.3 g
Force factor Bxl3.7 Tm
Inductance of the voice coil L0.5 mH
Terminals4.8 x 0.8 mm (+)/2.8 x 0.8 mm (-)
Dimensions and drawings
W 100 S · 4 Ω · part 9020 — Dimension drawing

Dimension drawing · Open original image

Installation and cabinet guidance

Allow a 94 mm cut-out for a frame that measures 122 mm across and stands 6 mm proud of the panel. Behind the baffle the driver needs 48 mm of clear depth over the basket and its 70 mm magnet, so leave room there for the terminals and the wiring. There are five 3.7 mm fixing holes on a 111 mm circle; mark them from the driver itself rather than assuming an even spacing.

Fit it to a rigid baffle with a continuous gasket or sealing strip between the frame and the panel, and tighten the fixings evenly and only enough to seal so the frame is not pulled out of shape. Check that the cone and the rubber surround stay clear of the grille and of any internal bracing.

The terminals take 4.8 x 0.8 mm blades on the positive side and 2.8 x 0.8 mm on the negative, so blade size identifies polarity. Observe it, insulate the joints, keep the wiring clear of the moving parts and use an amplifier suited to the 4 Ω load.

Visaton's published enclosure suggestions for this driver: 4 l closed (fc 95 Hz, Qtc 0.67); 5 l bass reflex with one BR 6.8 port cut to 6 cm (fb 70 Hz); 10 l bass reflex with one BR 6.8 port cut to 5 cm (fb 56 Hz).

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