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 Size (Millimeters) 50.8
DC Resistance 31 Ω±5.0%
Resonant Frequency 69.5 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 Bandwidth 20Hz~20KHz 12 dB/Oc
Effective Piston Area 15.9 cm2
Moving Mass 0.7 g
Motor Force Factor 3.76 T•m
Voice Coil Inner Diameter 25.76 mm
Gap Height 1.5 mm
Maximum Linear Excursion 0.6 mm
Ferrofluid Type
Minimum Impedance 31.6 Ω±7.5%
Voice Coil Inductance 0.13 mH
Mechanical Q Factor 2.07
Electrical Q Factor 0.7
Total Q Factor 0.52
Ratio 133.65 fs/Qts
Energy Bandwidth Product ((1/Qes)•fs)
Suspension Compliance 7.5 μm/N
Effective Cone Diameter 4.5 cm
Motor Efficiency Factor 0.5 (T•m2)/Ω
Voice Coil Former Material POLYIMIDE
Transducer Mass 0.04 Kg
Equivalent Volume 2.68 L

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