HPD-50N25PR00-32

Transducer Size (Millimeters)50.8
DC Resistance31
Resonant Frequency69.5
Half Space Sensitivity92.15
Rated Noise Power0.01
Test Spectrum Bandwidth20Hz~20KHz

Transducer Size2
DC Resistance31 Ω±5.0%
Resonant Frequency69.5 Hz15%
Half Space Sensitivity @ 2.83V92.15 dB±1.01
Sensitivity @ 1W/1m98.1 dB±1.01
Rated Noise Power (IEC 268-5 18.1)0.01 W
Test Spectrum Bandwidth20Hz~20KHz 12 dB/Oc
Effective Piston Area15.9 cm2
Moving Mass0.7 g
Motor Force Factor3.76 T•m
Voice Coil Inner Diameter25.76 mm
Gap Height1.5 mm
Maximum Linear Excursion0.6 mm
Ferrofluid Type
Minimum Impedance31.6 Ω±7.5%
Voice Coil Inductance0.13 mH
Mechanical Q Factor2.07
Electrical Q Factor0.7
Total Q Factor0.52
Ratio133.65 fs/Qts
Energy Bandwidth Product ((1/Qes)•fs)
Suspension Compliance7.5 μm/N
Effective Cone Diameter4.5 cm
Motor Efficiency Factor0.5 (T•m2)/Ω
Voice Coil Former MaterialPOLYIMIDE
Transducer Mass0.04 Kg
Equivalent Volume2.68 L

HPD headphone, 50 mm, composite paper diaphragm, NdFeB motor, no faceplate, 32 ohm