Scanspeak 18W/4434G00 Midwoofer - Discovery Range

18W / 4434G00

Scanspeak 18W/4434G00 Discovery Range, 18cm 8 Ohm Bass / Midrange.

Discovery logo

This 180mm / 7"  bass-midrange unit features the patented woven glassfibre NRSC cone offering a very benign and smooth sound. The ferrite magnet assembly is aluminium ringed (sometimes called Faraday rings) to control rising impedance at higher frequency which in turn offers a wider useable bandwidth. This unit is a solid choice for 2 way DIY designs and also finds many applications as a high quality replacement drive unit.

Combining some advanced features, this is a great performer at this price point.  Available in 4 and 8 ohms.

Key Features:

    • Coated NRSC Fibre Glass Cone
    • High efficiency ~91dB @ 2.83V
    • Die cast Aluminium Chassis vented below spider
    • Aluminium Ringed Magnet System
    • Low Damping SBR Rubber Surround

    This woofer is 4 Ohms ; the 8 Ohm version is here : 18W/8434G00

    Basic parameters:

    Resonant frequency (fs) 47 Hz Nominal impedance (Zn) 4 Ω
    Mechanical  Q factor (Qms) 7.81 DC resistance (Re) 3 Ω
    Electrical Q factor (Qes) 0.37 RMS power handling 55 W
    Total Q factor (Qts) 0.35 Sensitivity (2.83V/1m) 90.9 dB
    Equivalent volume (Vas) 20.7L Chassis diameter 180 mm

    Here's the full datasheet:

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