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        SB12MNRX25-4 4" Midrange Woofer

        SB12MNRX25-4 4" Midrange Woofer


        SB Acoustics SB12MNRX25-4 4" Midrange Woofer

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        € 49,55€ 59,95 10+ In stock
        • -5% Purchase 4 for only € 56,95 per piece

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        • At least two years warranty
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        Product description


        • Proprietary cone material with natural fibres made in-house
        • Shortened voice coil optimized for pure midrange reproduction
        • 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 SB12MNRX25-4 4" Midrange Woofer


        SB Acoustics Midrange Woofer is an excellent SB Acoustics Ferrite magnet midrange/midwoofer, featuring a high efficiency foam surround. Fitted with a proprietary composition paper cone, 1" voice coil. Very open cast frame for minimal reflections. Fs 61Hz, 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)
        4 ohms
        Sensitivity (SPL at 1m / 2.83V)
        88.5 dB
        Voice Coil Diameter
        DC Resistance (Re)
        3.2 ohms
        Voice Coil Inductance (Le)
        0.14 mH
        Resonant Frequency (Fs)
        58 Hz
        Mechanical Q (Qms)
        Electromagnetic Q (Qes)
        Total Q (Qts)
        Diaphragm Mass Inc. Airload (Mms)
        4.9 g
        Mechanical Compliance of Suspension (Cms)
        1.55 mm/N
        Surface Area of Cone (Sd)
        50.3 cm2
        BL Product (BL)
        3.7 Tm
        Compliance Equivalent Volume (Vas)
        0.19 ft.³
        Maximum Linear Excursion (Xmax)
        2.3 mm

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        5 of 5
        Very good build quality with CNC machined parts.
        By Guntars S. on 11 May 2021
        SB12MNRX25-4 4" Midrange Woofer
        € 49,55
        € 59,95
        SB12MNRX25-4 4" Midrange Woofer
        10+ In stock
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