Small Diaphragm, Cardioid Studio Condenser, For Sound Reinforcement

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The Audio-Technica AT4051A Microphone is a small diaphragm, transformerless studio microphone designed for voice and instrument recording as well as sound reinforcement. The microphone features a cardioid polar pattern which effectively minimises off-axis pick up resulting in focused and accurate sound reproduction. The microphone is modular and consists of 2 modular assemblies which are threaded together. The

The AT4051A handles sound pressure levels (SPL) up to 143dB at no greater than 1% THD, a suitable solution for percussion and drums as well as brass and other sources high in volume. The microphone features a frequency response of 20Hz to 20kHz with a low cut roll-off switch, eliminating low end noise and "popping" below 80Hz.

Key Features

A Small-Diaphragm Cardioid Condenser

Designed for voice/instrument recording or for sound reinforcement applications, the AT4051A has 20-20kHz response with 143dB of maximum sound pressure level, 127dB of dynamic range, and 1% maximum THD.

Modular Design

The modular design of the AT4051A consists of the AT4049-ELE power supply and AT4053-ELE head capsule. Optional accessory capsules may be used, increasing versatility.

Cardioid Polar Pattern

The off-axis response is well controlled, yielding a highly uniform cardioid polar pattern. Noise caused by monitors, instruments, voices and general room ambiance are eliminated.

Low Cut Roll-Off

The Low Cut roll-off switch eliminates hum, rumble and "popping" noise below 80Hz.

Pristine Signal Output

The high quality element and transformerless design yield a frequency response of 20Hz to 20kHz, and handles sound pressure levels up to 143dB. The result is accurate quite output of even the most subtle signal.


TransducerCardioid Capacitor
Polar PatternCardioid
Frequency Response20 Hz - 20 kHz
Dynamic Range (Typical)127 dB, (1 kHz at Maximum SPL)
Signal-to-Noise Ratio75 dB, (1 kHz at 1 Pa)
Maximum Input Sound Level146 dB SPL, (1 kHz at 1% T.H.D.)
Power RequirementsPhantom, 48v (±4v)
Output Impedance100 Ohms
Output ConnectorsXLR-3M Type
PadYes, 10 dB Pad; Roll-Off
Low Frequency Roll-OffYes, 80 Hz, (12 dB per Octave)
Dimensions6.10 x .83" (155 x 21mm) LxDdiameter
Weight120 g
Audio-Technica AT4051A Microphone
Audio Technica
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