Offering the realism of a live sound field, the AT4050ST is a side-address condenser with cardioid and figure-of-eight elements configured in a Mid-Side arrangement. This innovative stereo condenser allows sound recordists the choice of selecting a left-right stereo output or choosing discrete Mid-Side signals for later manipulation, a remarkable flexibility. The microphone’s dual-diaphragm capsules maintain precise polar pattern definition across the full frequency range. Its transformerless circuitry virtually eliminates low-frequency distortion.
Innovative side-address Mid-Side stereo microphone engineered for professional recording, broadcast and sound reinforcement
Independent cardioid and figure-of-eight condenser elements
Switch selection of Mid-Side mode and two internally matrixed stereo modes
Dual-diaphragm capsules maintain precise polar pattern definition across the full frequency range of the microphone
Transformerless circuitry virtually eliminates low-frequency distortion and provides superior correlation of high-speed transients
The 2-micron-thick, vapor-deposited gold diaphragms undergo a five-step aging process so that the optimum characteristics remain constant over years of use
Open acoustical environment of the symmetrical housing assembly minimizes unwanted internal reflections
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
Custom shock mount provides superior isolation
| Element | Externally-polarized (DC bias) condenser |
| Polar Pattern | Cardioid and Figure-of-eight |
| Frequency Response | 20-18,000 Hz |
| Low Frequency Roll-off | 80 Hz, 12 dB/octave |
| Open Circuit Sensitivity | Stereo 90: -42 dB (7.9 mV) dB re 1V at 1 Pa |
| Stereo 127 | -41 dB (8.9 mV) dB re 1V at 1 Pa |
| Mid | -36 dB (15.8 mV) dB re 1V at 1 Pa |
| Side | -36 dB (15.8 mV) dB re 1V at 1 Pa |
| Impedance | 50 ohms |
| Maximum Input Sound Level | Mid and Side: 149 dB SPL, 1 kHz at 1% T.H.D.;159 dB SPL, with 10 dB pad (nominal) |
| Noise | Stereo 90: 25 dB SPL |
| Stereo 127 | 16 dB SPL |
| Mid | 15 dB SPL |
| Side | 17 dB SPL |
| Dynamic Range (Typcial) | Mid: 134 dB, 1 kHz at Max SPL |
| Side | 132 dB, 1 kHz at Max SPL |
| Signal-to-Noise Ratio | Stereo 90: 69 dB, 1 kHz at 1 Pa |
| Stereo 127: 78 dB, 1 kHz at 1 Pa | |
| Mid: 79 dB, 1 kHz at 1 Pa | |
| Side: 77 dB, 1 kHz at 1 Pa | |
| Phantom Power Requirements | 48V DC, 6.4 mA typical (both channels total) |
| Switches | 90, 127, M-S; Flat, roll-off; 10 dB pad (nominal) |
| Weight | 517 g (18.2 oz) |
| Dimensions | 193.0 mm (7.60") long, 53.4 mm (2.10") maximum body diameter |
| Output Connector | Integral 5-pin XLRM-type |
| Cable | 5.0 m (16.5') long, 8-conductor, shielded, vinyl-jacketed stereo cable with 5-pin XLRF-type connector at microphone end and two 3-pin XLRM-type connectors at output end |
| Accessories Furnished | AT8449 shock mount for 5/8"-27 threaded stands; 5/8"-27 to 3/8"-16 threaded adapter; microphone dust cover; protective carrying case |
| Audio-Technica Case Style | R1 |