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        12SMP-4 12" Surface Mount Poly Cone Bass-midwoofer

        GRS 12SMP-4 12" Surface Mount Poly Cone Bass-midwoofer

        €89,95

        7 expected on 19-12-2025

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        GRS 12SMP-4 12" Surface Mount Poly Cone Bass-midwoofer

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        Brand: GRS
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        12" | 4 Ω
        12SMP-4 12" Surface Mount Poly Cone Bass-midwoofer
        12SMP-4 12" Surface Mount Poly Cone Bass-midwoofer
        12SMP-4 12" Surface Mount Poly Cone Bass-midwoofer
        12SMP-4 12" Surface Mount Poly Cone Bass-midwoofer
        12SMP-4 12" Surface Mount Poly Cone Bass-midwoofer
        12SMP-4 12" Surface Mount Poly Cone Bass-midwoofer
        € 74,34€ 89,95 Out of stock7 expected on 19-12-2025
        • -5% Purchase 4 for only € 85,45 per piece
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        12SMP-4 12" Surface Mount Poly Cone Bass-midwoofer
        12SMP-4 12" Surface Mount Poly Cone Bass-midwoofer
        12SMP-4 12" Surface Mount Poly Cone Bass-midwoofer
        12SMP-4 12" Surface Mount Poly Cone Bass-midwoofer
        12SMP-4 12" Surface Mount Poly Cone Bass-midwoofer
        12SMP-4 12" Surface Mount Poly Cone Bass-midwoofer

        Product description GRS 12SMP-4 Bass-midwoofer

        The GRS 12SMP-4 is a high-performance 12" surface-mount woofer designed to deliver extended low-frequency response and reliability in a variety of custom audio applications. Featuring an 4-ohm impedance and a robust poly cone design, this driver is engineered for precise bass reproduction with minimal distortion, making it ideal for DIY speaker builds and OEM replacements.

         

        Highlights of the GRS 12SMP-4

        • Durable damped poly cone with rubber surround ensures controlled resonance and smooth bass
        • Copper cap on the pole piece minimizes inductance and reduces distortion for cleaner sound
        • Shallow-profile steel frame for easy integration into surface-mount applications
        • Vented pole piece and aluminum voice coil former enhance cooling and thermal performance

         

        Product details GRS 12SMP-8

        GRS 12SMP-4 12" Surface Mount Woofer 4 Ohm

         

        The GRS 12SMP-4 is a versatile 12-inch woofer specifically tailored for surface-mount installations where space efficiency and low-frequency output are crucial. Its damped poly cone and rubber surround work in tandem to reduce unwanted resonances, delivering controlled and deep bass extension down to 20 Hz. A vented pole piece and aluminum voice coil former promote efficient heat dissipation, minimizing power compression during extended operation. With a sensitivity of 91.9 dB and a 90-watt RMS power handling, this driver offers a balance of power and performance. The integrated foam gasket ensures a tight cabinet seal, while the low-profile frame allows for seamless mounting in tight enclosures. Ideal for both new speaker projects and refurbishments, the GRS 12SMP-4 is a solid choice for audiophiles and DIYers alike.

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        Specifications

        Article number
        12SMP-4
        Woofer Type
        Bass-Midwoofer
        Nominal Diameter
        12"
        Power Handling (RMS)
        90 Watts
        Impedance (Z)
        4 Ω
        Sensitivity (SPL at 1m / 2.83V)
        91.9 dB
        Frequency Response
        29 - 1.500 Hz
        Voice Coil Diameter
        50 mm
        DC Resistance (Re)
        3.9 Ω
        Voice Coil Inductance (Le)
        0.41 mH
        Resonant Frequency (Fs)
        28 Hz
        Mechanical Q (Qms)
        3.1
        Electromagnetic Q (Qes)
        0.61
        Total Q (Qts)
        0.51
        Diaphragm Mass Inc. Airload (Mms)
        93 g
        Mechanical Compliance of Suspension (Cms)
        0.35 mm/N
        Surface Area of Cone (Sd)
        516 cm²
        Volume of Displacement (Vd)
        284 cm³
        BL Product (BL)
        10.2 Tm
        Compliance Equivalent Volume (Vas)
        132 Liters
        Maximum Linear Excursion (Xmax)
        +/- 5.5 mm
        Voice Coil Former
        Aluminum
        Overall Outside Diameter
        332 mm
        Overall Depth
        136 mm
        Baffle Cutout Diameter
        284 mm
        Bolt Circle Diameter
        319 mm
        # Mounting Holes
        6
        Mounting Hole Diameter
        5.5 mm

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        12SMP-4 12" Surface Mount Poly Cone Bass-midwoofer
        € 74,34
        € 89,95
        12SMP-4 12" Surface Mount Poly Cone Bass-midwoofer
        Out of stock
        7 expected on 19-12-2025
        Add to cart
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