Features:
- Specially engineered to meet the most critical acoustic requirements of professional recording, broadcast and sound reinforcement
- Direct-coupled, balanced output results in a clean signal even under high-output conditions
- Transformerless circuitry virtually eliminates low-frequency distortion and provides superior correlation of high-speed transients
- Hypercardioid polar pattern provides maximum feedback rejection and isolation of desired sound source
- Rugged turned-brass microphone housing for enduring dependability
- Integral 80 Hz high-pass filter switch and 10 dB pad switch
- State-of-the-art design and manufacturing techniques ensure compliance with A-T's stringent consistency and reliability standards
The AT4053b is an externally polarized (DC bias) condenser microphone with a hypercardioid polar pattern. It is designed to meet the most critical acoustic requirements of professional recording, broadcast and sound reinforcement. The microphone requires 48V phantom power for operation. The hypercardioid polar pattern of the microphone is more sensitive to sound originating directly in front of the element, making it useful for controlling feedback and reducing pickup of unwanted sounds. The output of the microphone is a 3-pin XLRM-type connector. The microphone is equipped with a switchable 10 dB pad and a switch that permits choice of flat response or low-frequency roll-off (via integral 80 Hz high-pass filter). The microphone is enclosed in a rugged housing. The included AT8405a stand clamp permits mounting on any microphone stand with 5 /8"-27 threads. A windscreen and a protective carrying case are also included.
Operation and Maintenance
The AT4053b requires 48V phantom power for operation. Output is low impedance (Lo-Z) balanced. The signal appears across Pins 2 and 3; Pin 1 is ground (shield). Output phase is "Pin 2 hot"- positive acoustic pressure produces positive voltage at Pin 2. To avoid phase cancellation and poor sound, all mic cables must be wired consistently: Pin 1-to-Pin 1, etc. An integral 80 Hz high-pass filter provides easy switching from a flatfrequency response to a low-end roll-off. The roll-off position reduces the pickup of low-frequency ambient noise (such as traffic, air-handlingsystems, etc.), room reverberation and mechanically-coupled vibrations. To engage the high-pass filter, slide the switch toward the "bent" line.The microphone is also equipped with a switchable 10 dB pad that lowers the microphone's sensitivity, thus providing higher SPL capability forflexible use with a wide range of users and system configurations. To engage the 10 dB pad, slide the switch toward the -10 position. Avoid leaving the microphone in the open sun or in areas where temperatures exceed 110° F (43° C) for extended periods. Extremely high humidity should also be avoided
For more information, please see 
Data Sheet
