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Engineered for versatile positioning and extremely flexible
performance in boardroom, school, government, house-of-worship
and other installed applications, the U857AL features a
small-diameter gooseneck with virtually no "memory."
Its ultra-flexible, robust design permits easy adjustment into
desired shape while resisting inadvertent repositioning. This
cardioid condenser gooseneck microphone direct mounts to any
5/8"-27 stand; it is 16.58" long. Equipped with
UniGuard™ innovations that offer unsurpassed immunity from
radio frequency interference, the U857AL accepts interchangeable
elements, available in cardioid, hypercardioid, omnidirectional
and UniLine™ line cardioid polar patterns. The battery- or
phantom-powered microphone also offers an 80 Hz low-cut
UniSteep® filter that reduces pickup of low-frequency ambient
noise.
- Designed for high-quality sound reinforcement, professional
recording and broadcasting
- Superior off-axis rejection for maximum gain before
feedback
- UniGuard™ RFI-shielding technology offers outstanding
rejection of radio frequency interference (RFI)
- Easy-to-adjust, rugged, small-diameter, alternating gooseneck
with virtually no "memory" permits quick positioning
into desired shape
- UniSteep® filter provides a steep low-frequency
attenuation to improve sound pickup without affecting voice
quality
- Accepts interchangeable elements to permit angle of
acceptance from 90° to 360°
- Two-stage foam windscreen yields dramatically improved
resistance to P-pops and other breath blasts
- Direct mounts to any 5/8"-27 stand, or to included
threaded mounting flange
- Operates on battery or phantom power
SPECIFICATIONS
- ELEMENT: Fixed-charge back plate, permanently polarized
condenser
- POLAR PATTERN: Cardioid
- FREQUENCY RESPONSE: 30-20,000 Hz
- LOW FREQUENCY ROLL-OFF: 80 Hz, 18 dB/octave
- OPEN CIRCUIT SENSITIVITY
- Phantom: –42 dB (7.9 mV) re 1V at 1 Pa
- Battery: –43 dB (7.0 mV) re 1V at 1 Pa
- IMPEDANCE
- Phantom: 200 ohms
- Battery: 270 ohms
- MAXIMUM INPUT SOUND LEVEL
- Phantom: 133 dB SPL, 1 kHz at 1% T.H.D.
- Battery: 123 dB SPL, 1 kHz at 1% T.H.D.
- DYNAMIC RANGE (typical)
- Phantom: 109 dB, 1 kHz at Max SPL
- Battery: 99 dB, 1 kHz at Max SPL
- SIGNAL-TO-NOISE RATIO: 70 dB, 1 kHz at 1 Pa
- PHANTOM POWER REQUIREMENTS: 11-52V DC, 2 mA typical
- BATTERY TYPE: 1.5V AA/UM3
- BATTERY CURRENT / LIFE: 0.4 mA / 1200 hours typical
(alkaline)
- SWITCH: Off, on-flat, on-roll-off
- WEIGHT (MICROPHONE): 4.6 oz (131 g)
- WEIGHT (POWER MODULE): 4.9 oz (139 g)
- DIMENSIONS (MICROPHONE): 16.58" (421.0 mm) long,
0.48" (12.2 mm) head diameter
- DIMENSIONS (POWER MODULE): 3.31" (84.0 mm) H x
2.48" (63.0 mm) W x 0.87" (22.0 mm) D
- OUTPUT CONNECTOR (POWER MODULE): Integral 3-pin
XLRM-type
- CABLE: 9.8' (3.0 m) long (permanently attached to
microphone), 0.13" (3.2 mm) diameter, 2-conductor shielded
cable with TA3F-type connector
- OPTIONAL INTERCHANGEABLE ELEMENTS
- UE-H hypercardioid (100°);
- UE-O omnidirectional (360°);
- UE-UL UniLine™ (90°)
- ACCESSORIES FURNISHED: AT8531 power module; AT8153 two-stage
foam windscreen; AT8663 A-mount flange; AT8664 A-mount cable
pass-through adapter; battery
- AUDIO-TECHNICA CASE STYLE: M2
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