Standard Type Magnetic Transducer MT1275 Series Specifications: Parameters Units MT1275A01NP MT1275B01NP Min Sound Pressure Level at 10cm Rated Voltage Operating Voltage Resonance Frequency Max Operating Current Coil Resistance Operating Temperature Case Material Weight dBA Vo-p Vo-p Hz mA °C g 80 1.5 1-2 2048 70 6.5 1 -20 - +60 Noryl 2.0 85 1.5 1-2 2731 70 6.5 1 -20 - +60 Noryl 2.0 Value applying rated voltage (1/2 duty square wave, resonance frequency) Unit: mm • Tolerance: 0.5mm MT1285 Series Specifications: Parameters Units MT1285A01NP MT1285A04NP MT1285B01NP Min Sound Pressure Level at 10cm Rated Voltage Operating Voltage Resonance Frequency Max Operating Current Coil Resistance Operating Temperature Case Material Weight dBA Vo-p Vo-p Hz mA °C g 80 1.5 1-5 2048 15 42 5 -20 - +60 Noryl 2.0 85 3.6 1-5 2048 60 16 4.5 -20 - +60 Noryl 2.0 80 1.5 1-5 4096 15 42 5 -20 - +60 Noryl 2.0 Value applying rated voltage (1/2 duty square wave, resonance frequency) www.hk-sound.com Unit: mm • Tolerance: 0.5mm P.10