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Visaton W 100 X 2 x 4 Ohm, 4 Inch, High-End Woofer

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W 100 X · 2 x 4 Ω · part 9049 — Product photo

Product photo · Enlarge image

W 100 X · 2 x 4 Ω · part 9049 — Product photo Product photo W 100 X · 2 x 4 Ω · part 9049 — Rear view and connections Rear view and connections W 100 X · 2 x 4 Ω · part 9049 — Dimension drawing Dimension drawing W 100 X · 2 x 4 Ω · part 9049 — Response and impedance (both voice coils in series) Response and impedance (both voice coils in series) W 100 X · 2 x 4 Ω · part 9049 — Directivity pattern Directivity pattern

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

W 100 X · 2 x 4 Ω · part 9049 — Product photo

Product photo

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Part number: 9049

A 10 cm dual-voice-coil woofer with a low resonance, made for compact subwoofers in hi-fi and industry.

Nominal size
10 cm / 4 inch
Impedance
2 x 4 Ω dual voice coil
Rated power
40 W
Cut-out
97 mm
Sensitivity
81 dB (1 W/1 m)
Resonance
63 Hz
£55.95 Business price, ex VAT £67.14 inc VAT at 20%
Maximum quantity available reached.

Description

The W 100 X combines a low resonance with a compact frame, and its wide, elastic rubber surround allows plenty of cone travel from a metal basket that is easy to fit. The 2 x 4 Ω dual voice coil can be wired for 4 Ω, 8 Ω or 2 Ω, and it takes 40 W rated power with resonance at 63 Hz.

Typical applications

  • Compact subwoofers
  • Car audio installations
  • Hi-fi and industrial systems
Full specifications
W 100 X · 2 x 4 Ω
Rated power40 W
Maximum power60 W
Nominal impedance4 Ω (one coil) / 8 Ω (coils in series) / 2 Ω (coils in parallel)
Frequency response (−10 dB)45–12000 Hz
Mean sound pressure level81 dB (1 W/1 m)
Excursion limit±7.5 mm
Resonance frequency fs63 Hz
Magnetic induction0.85 T
Magnetic flux243 µWb
Height of front pole-plate3.5 mm
Voice coil diameter26 mm
Height of winding10 mm
Cut-out97 mm
Mounting depth58 mm
Net weight0.76 kg
D.C. resistance Rdc3.6 Ω (one coil) / 7.2 Ω (coils in series) / 1.8 Ω (coils in parallel)
Mechanical Q factor Qms3.17 (one coil) / 3.33 (coils in series) / 2.74 (coils in parallel)
Electrical Q factor Qes0.95 (one coil) / 0.48 (coils in series) / 0.43 (coils in parallel)
Total Q factor Qts0.73 (one coil) / 0.42 (coils in series) / 0.37 (coils in parallel)
Equivalent volume Vas2.63 l (one coil) / 2.24 l (coils in series) / 2.89 l (coils in parallel)
Effective piston area Sd51.5 cm²
Dynamically moved mass Mms10.4 g
Force factor Bxl3.02 Tm (one coil) / 7.93 Tm (coils in series) / 3.75 Tm (coils in parallel)
Inductance of the voice coil L0.46 mH (one coil) / 1.49 mH (coils in series) / 0.41 mH (coils in parallel)
Terminals4.8 x 0.8 mm (+)/2.8 x 0.8 mm (-)
Dimensions and drawings
W 100 X · 2 x 4 Ω · part 9049 — Dimension drawing

Dimension drawing · Open original image

Installation and cabinet guidance

Allow a 97 mm panel opening. The frame is 116 mm in diameter, with 4.4 mm fixing holes on a 108 mm circle; mark them from the driver itself rather than assuming the spacing. Leave about 58 mm behind the panel for the basket and the 80 mm magnet housing, plus room for the terminals and the wiring.

Mount it on a rigid baffle with a continuous seal between the frame and the panel, tighten the fixings evenly and only enough to seal so the frame is not distorted, and keep the cone clear of any grille. With ±7.5 mm of travel available, check that the cone and the surround stay clear of the grille and of any internal bracing at full excursion. The two voice coils have separate 4.8 x 0.8 mm (+)/2.8 x 0.8 mm (-) blade terminals: use one coil alone for a 4 Ω load, both coils in series for 8 Ω, or both in parallel for 2 Ω, and make sure the amplifier is rated for the load you choose. Observe polarity on both coils so they move together; the coils can also be driven separately, for example from the rear channels of a car radio.

Visaton's published enclosure suggestions for this driver: 1.3 l closed (fc 105 Hz, Qtc 0.7); 3 l bass reflex with a round port 36 mm in diameter and 250 mm long (fb 62 Hz).

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