NE123W-04

Transducer Size (Millimeters)101.6
DC Resistance3.35
Resonant Frequency156.35
Half Space Sensitivity87.8
Rated Noise Power35
Test Spectrum Bandwidth60Hz - 8kHz

Transducer Size (Millimeters)101.6
DC Resistance3.35 Ω±5.0%
Resonant Frequency156.35 Hz15%
Half Space Sensitivity @ 2.83V87.8 dB±1.01
Sensitivity @ 1W/1m84.9 dB±1.01
Rated Noise Power (IEC 268-5 18.1)35 W
Test Spectrum Bandwidth60Hz - 8kHz 12 dB/Oc
Effective Piston Area54.1 cm2
Moving Mass6.3 g
Motor Force Factor5.09 T•m
Voice Coil Inner Diameter32.41 mm
Gap Height4 mm
Maximum Linear Excursion3 mm
Ferrofluid Type
Minimum Impedance4.15 Ω±7.5%
Voice Coil Inductance0.04 mH
Mechanical Q Factor3.94
Electrical Q Factor0.8
Total Q Factor0.67
Ratio234.4 fs/Qts
Energy Bandwidth Product ((1/Qes)•fs)
Suspension Compliance163.7 μm/N
Effective Cone Diameter8.3 cm
Motor Efficiency Factor7.8 (T•m2)/Ω
Voice Coil Former MaterialTiSV
Transducer Mass0.4 Kg
Equivalent Volume0.67 L

This 4 inch 4 ohm member of the NE family has leading-edge transducer technology packaged in a cutting edge, stylistic design. The woofers in this family feature an innovative cast aluminium basket design which minimizes acoustic reflections inside the driver, through large basket windows and sculpted basket spokes. The basket also is designed to act as a highly coupled heat sink to the Neodymium-Iron-Boron magnet (NdFeB) motor, so as to improve power handling capacity. The cone and dust cap are constructed of natural wood fiber material with proprietary coating formulas and processes, so as to yield high clarity products. The cone designs also utilize pentacone technology for improved frequency response. The voice coil bobbin is titanium, for improved performance. The FEA-designed motor features copper caps to minimize inductance and extend performance to high frequencies. Rounding out the design is a 4-way terminal block connector, for ease of electrical connection.