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    12nd830_01
    12nd830_02
    12nd830_03
    Alternative/Current Model:
    12ND930

    Features

    • 99 dB SPL 1W / 1m average sensitivity
    • 75 mm (3 in) Interleaved Sandwich Voice coil (ISV)
    • 450 W AES power handling
    • Neodymium magnet assembly
    • Ideal for compact reflex enclosures and two-way systems
    The 12ND830 is a 300mm (12 in) neodymium Mid-bass transducer, and differs from the 12ND930 in the wire conception, offering a lighter speaker with a lower force factor. The 12ND830 finds its ideal application in compact reflex enclosures where a considerable amount of low frequencies and low distortion are required. Its optimum low weight makes it suitable for fixed installations or portable professional loudspeaker systems. The neodymium magnet assembly developed by Eighteen Sound engineers assures a high flux concentration, low power compression and excellent heat exchange since the external magnet configuration is considerably more efficient than traditional under-pole magnet topology. The direct contact between the large heat sink and the specially designed basket, together with the magnetic structure, represents a fundamental improvement in thermal connection and heat dissipation. The result is increased power handling capabilities and lower power compression. The deep profile curvilinear cone, made from a special high strength wood pulp, has been designed to achieve the best possible linearity within its frequency range. The cone surround, made from linen material is highly resistant to aging and fatigue. The in-house developed cone treatment is fully water repellent and also gives a significant degree of rigidity to the cone. The 75 mm Interleaved Sandwich Voice coil (ISV) assembly is wound on a strong fiberglas former which improves force transmission and thermal power handling. A special coating applied to both the top and back plates makes the 12ND830 far more resistant to the corrosive effects of salts and oxidization.

    Specifications

    Design

    Parameters

    Mounting and Shipping Info

    • Nominal Diameter300 mm ( in)
    • Nominal Impedance8 Ω
    • Minimum Impedance7.0 Ω
    • Nominal Power Handling1450 W
    • Continuous Power Handling2700 W
    • Sensitivity399.0 dB
    • Frequency Range53 - 5000 Hz
    • Voice Coil Diameter75 mm (3.0 in)
    • Winding Materialaluminum
    • Surround ShapeM-roll
    • Cone ShapeCurvilinear
    • Magnet MaterialNeo
    • Woofer Cone TreatmentWeather protected
    • Recommended Enclosure75.0 dm3 (2.65 ft3)
    • Recommended Tuning55 Hz
    • Resonance Frequency55 Hz
    • Re5.7 Ω
    • Qes0.3
    • Qms5.15
    • Qts0.28
    • Vas72.0 dm3 (2.54 ft3)
    • Sd531.0 cm2 (82.31 in2)
    • Xmax6.5 mm
    • Mms46.0 g
    • Bl17.6 Txm
    • Le1.5 mH
    • EBP183 Hz
    • Overall Diameter315 mm (12.4 in)
    • Bolt Circle Diameter296 mm (11.65 in)
    • Baffle Cutout Diameter282.0 mm (11.1 in)
    • Depth140 mm (5.51 in)
    • Flange and Gasket Thickness9 mm (0.35 in)
    • Net Weight4.0 kg (8.82 lb)
    • Shipping Weight5.0 kg ( lb)
    • Shipping Box332 x 332 x 184 mm (13.07x13.07x7.24 in)
    • 2 hours test made with continuous pink noise signal within the range Fs-10Fs. Power calculated on rated nominal impedance. Loudspeaker in free air.
    • Power on Continuous Program is defined as 3 dB greater than the Nominal rating.
    • Applied RMS Voltage is set to 2.83 V for 8 ohms Nominal Impedance.