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 Resistance3.67 Ω±5.0%
Resonant Frequency234.6 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 Bandwidth100 Hz - 20K Hz 12 dB/Oc
Effective Piston Area8.5 cm2
Moving Mass1 g
Motor Force Factor3 T•m
Voice Coil Inner Diameter25.5 mm
Gap Height2 mm
Maximum Linear Excursion1.9 mm
Ferrofluid TypeAPG834
Minimum Impedance4.39 Ω±7.5%
Voice Coil Inductance0.08 mH
Mechanical Q Factor2.21
Electrical Q Factor0.61
Total Q Factor0.48
Ratio492.86 fs/Qts
Energy Bandwidth Product ((1/Qes)•fs)
Suspension Compliance457 μm/N
Effective Cone Diameter3.29 cm
Motor Efficiency Factor2.4 (T•m2)/Ω
Voice Coil Former MaterialKSV
Transducer Mass0.07 Kg
Equivalent Volume0.05 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.