NE85W-04

Transducer Size (Millimeters)63.5
DC Resistance3.65
Resonant Frequency104.94
Half Space Sensitivity84.81
Rated Noise Power25
Test Spectrum Bandwidth100Hz - 20kHz

Transducer Size2.5
DC Resistance3.65 Ω±5.0%
Resonant Frequency104.94 Hz15%
Half Space Sensitivity @ 2.83V84.81 dB±1.01
Sensitivity @ 1W/1m81.9 dB±1.01
Rated Noise Power (IEC 268-5 18.1)25 W
Test Spectrum Bandwidth100Hz - 20kHz 12 dB/Oc
Effective Piston Area22.3 cm2
Moving Mass2.2 g
Motor Force Factor2.75 T•m
Voice Coil Inner Diameter25.73 mm
Gap Height4 mm
Maximum Linear Excursion1.8 mm
Ferrofluid Type
Minimum Impedance4.13 Ω±7.5%
Voice Coil Inductance0.06 mH
Mechanical Q Factor8.45
Electrical Q Factor0.69
Total Q Factor0.64
Ratio164.74 fs/Qts
Energy Bandwidth Product ((1/Qes)•fs)
Suspension Compliance1066.2 μm/N
Effective Cone Diameter5.31 cm
Motor Efficiency Factor2.1 (T•m2)/Ω
Voice Coil Former MaterialTiSV
Transducer Mass0.24 Kg
Equivalent Volume0.73 L

This 2.5 inch 4 ohm member of the NE family has leading-edge transducer technology packaged in a cutting edge, stylistic design. The full-range drivers 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 is aluminium, with a butyl rubber surround designed through finite element analysis for linearity of performance. 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.