Transducer Size (Millimeters)40
DC Resistance3.67
Resonant Frequency234.6
Half Space Sensitivity85.44
Rated Noise Power5
Test Spectrum Bandwidth100 Hz - 20K Hz

Transducer Size (Millimeters) 40
DC Resistance 3.67 Ω±5.0%
Resonant Frequency 234.6 Hz15%
Half Space Sensitivity @ 2.83V85.44 dB±1.01
Sensitivity @ 1W/1m82.8 dB±1.01
Rated Noise Power (IEC 268-5 18.1)5 W
Test Spectrum Bandwidth 100 Hz - 20K Hz 12 dB/Oc
Effective Piston Area 8.5 cm2
Moving Mass 1 g
Motor Force Factor 3 T•m
Voice Coil Inner Diameter 25.5 mm
Gap Height 2 mm
Maximum Linear Excursion 1.9 mm
Ferrofluid Type APG834
Minimum Impedance 4.39 Ω±7.5%
Voice Coil Inductance 0.08 mH
Mechanical Q Factor 2.21
Electrical Q Factor 0.61
Total Q Factor 0.48
Ratio 492.86 fs/Qts
Energy Bandwidth Product ((1/Qes)•fs)
Suspension Compliance 457 μm/N
Effective Cone Diameter 3.29 cm
Motor Efficiency Factor 2.4 (T•m2)/Ω
Voice Coil Former Material KSV
Transducer Mass 0.07 Kg
Equivalent Volume 0.05 L

This 40 mm 4 ohm compact premium micro transducer is designed for computer, television array, and similar applications. It features a neodymium magnet, a light aluminium cone, and a high-temperature polycarbonate frame. The PMT family`s transducers feature low resonant frequencies, low THD and a full range bandwidth.