The Audio-Technica AT4021 is a small-diaphragm cardioid condenser microphone engineered for critical studio and live applications. Its low-mass diaphragm provides excellent transient response and extended bandwidth while reducing handling and mechanical noise transfer. With a flat, extended frequency response, high maximum SPL, wide dynamic range and exceptionally low self-noise, the AT4021 excels on acoustic instruments and percussion. Equipped with a switchable 80 Hz high-pass filter and 10 dB pad.
Cardioid
Polar Pattern · Small diaphragm
80 Hz
High-Pass Filter · Switchable
-10 dB
Pad · Switchable
Features
Flat, extended frequency response for accurate reproduction
Low-mass diaphragm for superior transient response
High SPL handling and wide dynamic range
Exceptionally low self-noise for digital recording
Switchable 80 Hz high-pass filter and 10 dB pad
High front-to-back rejection ratio for improved isolation
Outstanding reproduction of low-frequency sounds
Rugged construction for reliable studio and live use
Specifications
| Element | Condenser |
| Polar Pattern | Cardioid |
| High-Pass Filter | 80 Hz (switchable) |
| Pad | -10 dB (switchable) |
| Power Requirement | 48V phantom power |
















