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        SB12NRXF25-4 Norex Bass-midwoofer

        SB Acoustics SB12NRXF25-4 Norex Bass-midwoofer

        €62,45

        4 In stock

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        SB Acoustics SB12NRXF25-4 Norex Bass-midwoofer

        2 reviews
        5 from 5
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        Brand: SB Acoustics
        Show all Mid-range woofer
        4'' | 4 Ω
        SB12NRXF25-4 Norex Bass-midwoofer
        SB12NRXF25-4 Norex Bass-midwoofer
        SB12NRXF25-4 Norex Bass-midwoofer
        SB12NRXF25-4 Norex Bass-midwoofer
        SB12NRXF25-4 Norex Bass-midwoofer
        SB12NRXF25-4 Norex Bass-midwoofer
        SB12NRXF25-4 Norex Bass-midwoofer
        SB12NRXF25-4 Norex Bass-midwoofer
        SB12NRXF25-4 Norex Bass-midwoofer
        SB12NRXF25-4 Norex Bass-midwoofer
        SB12NRXF25-4 Norex Bass-midwoofer
        SB12NRXF25-4 Norex Bass-midwoofer
        SB12NRXF25-4 Norex Bass-midwoofer
        SB12NRXF25-4 Norex Bass-midwoofer
        € 51,61€ 62,45 4 In stock
        • -5% Purchase 4 for only € 59,33 per piece
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        • At least two years warranty
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        SB12NRXF25-4 Norex Bass-midwoofer
        SB12NRXF25-4 Norex Bass-midwoofer
        SB12NRXF25-4 Norex Bass-midwoofer
        SB12NRXF25-4 Norex Bass-midwoofer
        SB12NRXF25-4 Norex Bass-midwoofer
        SB12NRXF25-4 Norex Bass-midwoofer
        SB12NRXF25-4 Norex Bass-midwoofer
        SB12NRXF25-4 Norex Bass-midwoofer
        SB12NRXF25-4 Norex Bass-midwoofer
        SB12NRXF25-4 Norex Bass-midwoofer
        SB12NRXF25-4 Norex Bass-midwoofer
        SB12NRXF25-4 Norex Bass-midwoofer
        SB12NRXF25-4 Norex Bass-midwoofer
        SB12NRXF25-4 Norex Bass-midwoofer
        SB12NRXF25-4 Norex Bass-midwoofer
        SB12NRXF25-4 Norex Bass-midwoofer

        Pros and cons

        According to our specialists
        • Non-conducting fibre glass coil former for minimum damping
        • Reflex box : Not recommended

        Product description SB Acoustics SB12NRXF25-4 Bass-midwoofer

        The SB12NRXF25-4 is a 4-inch full-range driver from SB Acoustics. It features a proprietary cone material made from natural fibers, a foam surround, a vented cast aluminum chassis, and a CCAW voice coil. The driver has a nominal impedance of 4 ohms and a sensitivity of 87 dB. It is rated for a maximum power handling of 30 watts.

         

        Highlights

        • Proprietary cone material with natural fibres made in-house
        • Foam surround for maximum transparency and midrange resolution
        • 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
        • Shorting ring in motor system for reduced distortion

         

        Product details

        SB Acoustics SB12NRXF25-4 Norex Bass-midwoofer

         

        The SB12NRXF25-4 is a well-rounded 4-inch full-range driver that is capable of delivering clear, accurate sound in a variety of applications. It is a good choice for bookshelf speakers, satellite speakers, and subwoofers. The proprietary cone material is made from a blend of natural fibers that is said to provide a more natural and balanced sound than traditional paper cones.

         

        The foam surround is designed to provide a smooth and accurate response in the midrange frequencies. The vented cast aluminum chassis helps to dissipate heat and reduce distortion. The CCAW voice coil is lightweight and provides good power handling. The long life silver lead wires are resistant to corrosion and oxidation. The non-conducting fiberglass coil former helps to reduce noise and distortion. The shorting ring in the motor system helps to reduce distortion at high frequencies.

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        Specifications

        Article number
        SB12NRXF25-4
        EAN
        8785256847907
        Woofer Type
        Bass-midwoofer
        Nominal Diameter
        4 inch
        Power Handling (RMS)
        30 Watts
        Impedance (Z)
        4 Ω
        Sensitivity (SPL at 1m / 2.83V)
        87 dB
        Frequency Response
        100-2000 Hz
        Voice Coil Diameter
        25.4 mm
        Magnet Weight
        0.32 kg
        DC Resistance (Re)
        3.1 Ω
        Voice Coil Inductance (Le)
        0.27 mH
        Resonant Frequency (Fs)
        61 Hz
        Mechanical Q (Qms)
        5.3
        Electromagnetic Q (Qes)
        0.53
        Total Q (Qts)
        0.48
        Diaphragm Mass Inc. Airload (Mms)
        5.8 g
        Mechanical Compliance of Suspension (Cms)
        1.17 mm/N
        Surface Area of Cone (Sd)
        50 cm²
        BL Product (BL)
        3.6 N/A
        Compliance Equivalent Volume (Vas)
        4.1
        Maximum Linear Excursion (Xmax)
        5 mm
        Driver's Mechanical Losses (Rms)
        0.42 kg/s
        Overall Outside Diameter
        123 mm
        Overall Depth
        69.8 mm
        # Mounting Holes
        4
        Mounting Hole Diameter
        4,3 mm

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        Reviews

        2 reviews
        Review this product
        5 of 5
        In deze klasse een pareltje, in de toch al goede reeks van SB. Papier, lekker licht. Goed voor mid maar ook als mid woofertje. Liefst voor een TL, maar BR kan nog steeds. Rolrand van schuim, maar dat heeft een goede reden: de bekende dip rond de 600Hz is afwezig. Mooie combo voor een AMT tweeter. Hoog inzetbaar dankzij een rustig gedrag, al zou ik beneden de 3000Hz blijven. Mooi 2e orde LR af te filteren. Met de juiste tweeter, zelfs 1e orde. V...

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        By Frank on 15 August 2025
        5 of 5
        Perfect service and adminstartion!
        By Peter on 14 October 2024
        SB12NRXF25-4 Norex Bass-midwoofer
        € 51,61
        € 62,45
        SB12NRXF25-4 Norex Bass-midwoofer
        4 In stock
        Add to cart
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