Transducer Size (Millimeters)30
DC Resistance3.53
Resonant Frequency249.75
Half Space Sensitivity81.58
Rated Noise Power1.5
Test Spectrum Bandwidth250Hz-20KHz

Transducer Size (Millimeters)30
DC Resistance3.53 Ω±5.0%
Resonant Frequency249.75 Hz15%
Half Space Sensitivity @ 2.83V81.58 dB±1.01
Sensitivity @ 1W/1m78.5 dB±1.01
Rated Noise Power (IEC 268-5 18.1)1.5 W
Test Spectrum Bandwidth250Hz-20KHz 12 dB/Oc
Effective Piston Area4.9 cm2
Moving Mass0.5 g
Motor Force Factor1.72 T•m
Voice Coil Inner Diameter18 mm
Gap Height1.5 mm
Maximum Linear Excursion1.1 mm
Ferrofluid TypeAPG834
Minimum Impedance3.91 Ω±7.5%
Voice Coil Inductance0.04 mH
Mechanical Q Factor1.71
Electrical Q Factor0.95
Total Q Factor0.61
Ratio408.76 fs/Qts
Energy Bandwidth Product ((1/Qes)•fs)
Suspension Compliance802.3 μm/N
Effective Cone Diameter2.49 cm
Motor Efficiency Factor0.8 (T•m2)/Ω
Voice Coil Former MaterialKSV
Transducer Mass0.03 Kg
Equivalent Volume0.03 L

This 30 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.