A1:
- Element: moving coil dynamic.
- Polar pattern: uni-directional.
- Frequency: 30Hz-10kHz.
- Sensitivity: -58dB±3dB.
- Output impedance: 200Ω.
A2:
- Element: moving coil dynamic.
- Polar pattern: uni-directional.
- Frequency: 30Hz-10kHz.
- Sensitivity: -55dB±3dB.
- Output impedance: 200Ω.
A3:
- Element: back electret condenser.
- Polar pattern: uni-directional.
- Frequency: 50Hz-18kHz.
- Sensitivity: -45dB±3dB.
- Output impedance: 280Ω.