Transducer Size (Millimeters)40
DC Resistance3.52
Resonant Frequency240.77
Half Space Sensitivity85.97
Rated Noise Power5
Test Spectrum Bandwidth100Hz-20KHz

Transducer Size (Millimeters)40
DC Resistance3.52 Ω±5.0%
Resonant Frequency240.77 Hz15%
Half Space Sensitivity @ 2.83V85.97 dB±1.01
Sensitivity @ 1W/1m82.7 dB±1.01
Rated Noise Power (IEC 268-5 18.1)5 W
Test Spectrum Bandwidth100Hz-20KHz 12 dB/Oc
Effective Piston Area8.5 cm2
Moving Mass1 g
Motor Force Factor2.96 T•m
Voice Coil Inner Diameter25.5 mm
Gap Height2 mm
Maximum Linear Excursion1.9 mm
Ferrofluid TypeAPG834
Minimum Impedance3.74 Ω±7.5%
Voice Coil Inductance0.07 mH
Mechanical Q Factor2.39
Electrical Q Factor0.58
Total Q Factor0.47
Ratio516.68 fs/Qts
Energy Bandwidth Product ((1/Qes)•fs)
Suspension Compliance457.8 μm/N
Effective Cone Diameter3.29 cm
Motor Efficiency Factor2.5 (T•m2)/Ω
Voice Coil Former MaterialKSV
Transducer Mass0.06 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.