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Scanspeak 18WU/4747T00 Woofer - Illuminator Range

Scanspeak 18WU/4747T00 Illuminator 18cm 4 Ohm woofer. A radical rethink in drive unit design.

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This 18cm 4 Ohm woofer is the culmination of many years research at Scanspeak R and D, Videbaek, Denmark and brings together a host of advancements.

Featuring a rigid aluminium alloy cone, copper capped pole piece & huge linear excursion, this audiophile quality driver operates as a pure piston. The unique airflow optimised open chassis and underhung Neodymium SD-3 magnet system define new standards in terms of minimal compression & reflection.

Delivering highly accurate bass reproduction with great authority, extension and texture, we believe this is possibly the finest 18cm dedicated woofer available.

Available in 4 and 8 ohms.

Key Features:

    • Under-Hung Neodymium Motor Design
    • Black Anodised Aluminium Alloy Cone
    • Exceptionally Long Linear Excursion
    • Patented Symmetrical Drive (SD-3)
    • Low-loss linear suspension

    This woofer is 4 Ohms ; the 8 Ohm version is here : 18WU/8747T00

    Basic parameters:

    Resonant frequency (fs) 32 Hz Nominal impedance (Zn) 4 Ω
    Mechanical  Q factor (Qms) 3.42 DC resistance (Re) 3.2 Ω
    Electrical Q factor (Qes) 0.30 RMS power handling 80 W
    Total Q factor (Qts) 0.28 Sensitivity (2.83V/1m) 88.1 dB
    Equivalent volume (Vas) 48.3L Chassis diameter 184 mm

    Here's the full datasheet:

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