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        SB12NRX25-8 4'' Midrange Woofer

        SB12NRX25-8 4'' Midrange Woofer


        SB Acoustics SB12NRX25-8 4'' Midrange Woofer

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        4 from 5
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        € 49,55€ 59,95 2 In stock4 expected on 15-12-2023
        • -5% Purchase 4 for only € 56,95 per piece

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        • Ordered now, shipped on Monday
        • At least two years warranty
        • 45-day cooling-off period to return
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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.

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        Article number
        Woofer Series
        NRX Series
        Woofer Type
        Nominal Diameter
        Power Handling (RMS)
        30 Watts
        Impedance (Z)
        8 ohms
        Sensitivity (SPL at 1m / 2.83V)
        85.5 dB
        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

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        4 of 5
        ... Duidelijk een product uit de oude school van Vifa...
        By Michel V. on 26 December 2020
        SB12NRX25-8 4'' Midrange Woofer
        € 49,55
        € 59,95
        SB12NRX25-8 4'' Midrange Woofer
        2 In stock
        4 expected on 15-12-2023
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