frequency range : 20Hz- 20Hz
Dricing coil
diameter: φ 50 mm
wire length:2.2 m
K21 Sensitivity : 42+_ 3dB
Impedance : 32 Omega + 10%
Unbalance:<4db
Headphone k21 Horn dimeter:50mm
Mike dimension: 6mm X 5mm
load Impedance : 2.2k
Maximum power:30MW
Current:<200ma
Voltage: USB 5v
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