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  • LF Drivers

    8FMB51

    8 inches

    Woofer

    NEW
    The FMB series mid-bass woofers from B&C Speakers offer acoustic designers a new range of high efficiency, wide bandwidth alternatives that are not currently available in the B&C range. These full-featured transducers incorporate lower cost ferrite motors, inside/outside wound copper clad aluminum wire voice coils, weatherproof impregnated paper cones, and a symmetrical inductance profile. The FMB Series is especially well suited for two-way loudspeaker enclosures.

    Features


    500 W continuous program power capacity
    51 mm (2 in) aluminium voice coil
    67 - 4500 Hz response
    96.5 dB sensitivity
    Ventilated voice coil gap for reduced power compression

    Specifications

    Nominal Diameter

    200 mm (8 in)

    Nominal Impedance

    8 Ω

    Minimum Impedance

    5.5 Ω

    Nominal Power Handling

    250 W

    Continuous Power Handling

    500 W

    Sensitivity

    96.5 dB

    Frequency Range

    67 - 4500 Hz

    Voice Coil Diameter

    51 mm (2 in)

    Winding Material

    Aluminium

    Former Material

    Glass Fibre

    Winding Depth

    15 mm (0.59 in)

    Magnetic Gap Depth

    8 mm (0.31 in)

    Flux Density

    1.19 T

    Woofer Cone Treatment

    Waterproof Impregnated Cone

    Parameters

    Fs

    67 Hz

    Re

    4.7 Ω

    Qes

    0.31

    Qms

    3.07

    Qts

    0.28

    Vas

    20.7 dm³ (0.73 ft³)

    Sd

    227 cm² (35.19 sq²)

    η0

    1.91 %

    Xmax

    5.5 mm

    Xvar

    5 mm

    Mms

    20.2 g

    Bl

    11.3 Tm

    Le

    0.48 mH

    EBP

    216 Hz

    Design

    Surround Shape

    Triple Roll

    Cone Shape

    Curvilinear

    Magnet Material

    Ferrite Ring

    Spider

    Single

    Pole Design

    T-Pole

    Woofer Cone Treatment

    Waterproof Impregnated Cone

    Recommended Enclosure

    14 dm³ (0.49 ft³)

    Recommended Tuning

    80 Hz

    Mounting and Shipping Info

    Overall Diameter

    225 mm (8.86 in)

    Bolt Circle Diameter

    210 mm (8.27 in)

    Baffle Cutout Diameter

    187 mm (7.36 in)

    Depth

    92 mm (3.62 in)

    Flange and Gasket Thickness

    9 mm (0.35 in)

    Air Volume Occupied by Driver

    1.2 dm³ (0.04 ft³)

    Net Weight

    3.4 kg (7.5 lb)

    Shipping Units

    1 pcs

    Shipping Weight

    3.85 kg (8.49 lb)

    Shipping Box

    255x255x150 mm (10.04x10.04x5.91 in)