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PMT-40N25AL01-04 PMT-40N25AL01-04 PMT-40N25AL01-04


Platform: Tymphany
Driver Type: Full Range
Size: 40 mm
Motor: Neodymium
Frame: Plastic Basket
Impedance: 4 Ω
Diaphragm: Al (Aluminium)

Frequency & Impedance Response


Technical Specifications

Driver Size 40 mm
DC Resistance 3.67 Ω ±5.0%
Resonant Frequency 234.6 Hz 15%
Half Space Sensitivity @ 2.83V 85.44 dB ±1.01
Sensitivity @ 1W/1m 82.8 dB ±1.01
Rated Noise Power (IEC 268-5 18.1) 5 W
Test Spectrum Bandwidth 100 Hz - 20K Hz 12 dB/Oct
Effective Piston Area 8.5 cm2
Moving Mass 1 g
Motor Force Factor 3 T•m
Voice Coil Inner Diameter 25.5 mm
Gap Height 2 mm
Maximum Linear Excursion 1.9 mm
Ferrofluid Type APG834
Minimum Impedance   4.39 Ω ±7.5%
Voice Coil Inductance 0.08 mH
Mechanical Q Factor 2.21
Electrical Q Factor 0.61
Total Q Factor 0.48
Ratio 492.86 fs/Qts
Energy Bandwidth Product ((1/Qes)•fs)
Suspension Compliance 457 μm/N
Effective Cone Diameter 3.29 cm
Motor Efficiency Factor 2.4 (T•m2)/Ω
Voice Coil Former Material KSV
Driver Mass 0.07 Kg
Equivalent Volume 0.05 L

Product Info

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.

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