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SWC-57R25.1-4F2R

Features: 
Cone
Voice Applications
External
Characteristic Minimum Rated Maximum Notes
Type of Magnet NdFeB
Type of Frame Metal
Type of Diaphragm Paper
Type Magnetic
Sound Pressure Level dB at 30cm 85.44 Measured 81±3dB at 2W and 50cm.
Power W 2 4
Frequency kHz 0.22 0.22 20
Available Input Impedance Ω 4 8 64
Width mm 57
Height mm 25.1

Dimension Drawing: