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    SB Acoustics SB12NRX25-8 4'' Midrange Woofer

    € 45,41€ 54,95 2 In stock: delivery time 1-4 business days
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    Product description


    • Proprietary cone material with natural fibres made in-house
    • High damping Butyl rubber surround for non-resonant sound character
    • Vented pole piece for reduced compression
    • Vented cast aluminium chassis for optimum strength and low compression
    • CCAW voice coil for reduced moving mass
    • Long life silver lead wires
    • Non-conducting fibre glass coil former for minimum damping


    Product details

    SB Acoustics SB12NRX25-8 4'' Midrange Woofer


    The SB Acoustics SB12NRX25-8 4" Midwoofer is an excellent SB Acoustics Ferrite magnet midrange/midwoofer, featuring a high efficiency low damping rubber surround. Fitted with a proprietary composition paper cone, 1" voice coil. Very open cast frame for minimal reflections. Fs 55Hz, good level extended response up to 5KHz.


    Article number
    Woofer Series
    NRX Series
    Woofer Type
    Nominal Diameter
    Power Handling (RMS)
    30 Watts
    Impedance (Z)
    8 ohms
    85.5 dB 2.83V/1m
    Voice Coil Diameter
    DC Resistance (Re)
    6.4 ohms
    Voice Coil Inductance (Le)
    0.34 mH
    Resonant Frequency (Fs)
    57 Hz
    Mechanical Q (Qms)
    Electromagnetic Q (Qes)
    Total Q (Qts)
    Diaphragm Mass Inc. Airload (Mms)
    5.2 g
    Mechanical Compliance of Suspension (Cms)
    1.49 mm/N
    Surface Area of Cone (Sd)
    50 cm2
    BL Product (BL)
    5.4 Tm
    Compliance Equivalent Volume (Vas)
    0.18 ft.³
    Maximum Linear Excursion (Xmax)
    5 mm


    4 from 5Based on 1 reviews
    Review this product
    4 of 5
    ... Duidelijk een product uit de oude school van Vifa...
    By Michel V. on 26 December 2020

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    SB12NRX25-8 4'' Midrange Woofer
    € 45,41
    € 54,95
    SB12NRX25-8 4'' Midrange Woofer
    2 In stock: delivery time 1-4 business days
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