AT4021
- End-address cardioid condenser microphone (Fixed-charge back plate, permanently polarized)
AT4022
- End-address omnidirectional condenser microphone for instruments (freq. response: 20-20,000 Hz
AT4040
- Side-address cardioid condenser microphone (freq. response: 20-20,000 Hz) (externally polarized)
AT4050ST
- Stereo Condenser Microphone (20-18,000 Hz frequency response)
AT4051b
- End-address cardioid condenser microphone (externally polarized)