The Audio-Technica AT4051B is a modular cardioid condenser microphone from the AT40 Series, engineered for professional recording, broadcast and sound reinforcement. It comprises the AT4900b-48 electronic body and AT4051b-EL cardioid head capsule, both available separately. Direct-coupled balanced output delivers a clean signal even under high-output conditions, while transformerless circuitry virtually eliminates low-frequency distortion. Interchangeable capsules, omnidirectional (AT4049b-EL) and hypercardioid (AT4053b-EL), extend the system’s versatility.
Cardioid
Polar Pattern · High front-to-back rejection
20-20,000 Hz
Frequency Response · Full range
80 Hz
High-Pass Filter · Switchable
10 dB
Pad · Switchable
Features
High front-to-back rejection cardioid pattern for superior source isolation
Direct-coupled balanced output for clean signals under high-output conditions
Transformerless circuitry virtually eliminates low-frequency distortion
Fast transient response for open, transparent reproduction
Modular design, body and capsule available separately
Interchangeable capsules: omnidirectional (AT4049b-EL) and hypercardioid (AT4053b-EL)
Switchable 80 Hz high-pass filter and 10 dB pad
Rugged turned-brass housing for long-term dependability
RoHS-compliant
Specifications
| Element | Externally polarised (DC bias) condenser |
| Polar Pattern | Cardioid |
| Frequency Response | 20-20,000 Hz |
| High-Pass Filter | 80 Hz (switchable) |
| Pad | 10 dB (switchable) |
| Output | Direct-coupled, balanced, transformerless |
| Housing | Turned brass |
| Compliance | RoHS |





