Audio-Technica U857RLU

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UniLine Line-Cardioid Condenser Gooseneck Microphone, 21.38" Long

The 21.38" version of U857RU, the U857RLU UniLine condenser adapter-mount gooseneck microphone features Audio-Technica's UniLine line-cardioid element. The microphone's ultra-flexible, robust, small-diameter gooseneck permits easy adjustment into desired shape while resisting inadvertent repositioning. The microphone direct mounts to any 5/8"-27 stand. Equipped with UniGuard innovations that offer unsurpassed immunity from radio frequency interference, the U857RLU accepts interchangeable elements, available in cardioid, hypercardioid, omnidirectional and UniLine line cardioid polar patterns. The 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

  • UniLine polar pattern provides narrow 90 acceptance angle

  • 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


  • ELEMENT: Fixed-charge back plate, permanently polarized condenser

  • POLAR PATTERN: Line Cardioid

  • FREQUENCY RESPONSE: 30-20,000 Hz

  • LOW FREQUENCY ROLL-OFF: 80 Hz, 18 dB/octave

  • OPEN CIRCUIT SENSITIVITY: -35 dB (17.7 mV) re 1V at 1 Pa

  • IMPEDANCE: 250 ohms

  • MAXIMUM INPUT SOUND LEVEL: 135 dB SPL, 1 kHz at 1% T.H.D.

  • DYNAMIC RANGE (typical): 115 dB, 1 kHz at Max SPL

  • SIGNAL-TO-NOISE RATIO: 74 dB, 1 kHz at 1 Pa


  • SWITCH: Flat, roll-off

  • WEIGHT: 5.2 oz (148 g)

  • WEIGHT (POWER MODULE): 2.9 oz (81 g)

  • DIMENSIONS (MICROPHONE): 21.38" (543.0 mm) long, 0.48" (12.2 mm) head diameter

  • DIMENSIONS (POWER MODULE): 3.66" (92.9 mm) long, 0.74" (18.9 mm) diameter


  • 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-C cardioid (120); UE-H hypercardioid (100); UE-O omnidirectional (360)

  • ACCESSORIES FURNISHED: AT8538 power module; AT8663 A-mount flange; AT8664 A-mount cable pass-through adapter; AT8154 two-stage foam windscreen


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Brand Audio-Technica
Model U857RLU
Part Number U857RLU
UPC 042005140800
Product Category Gooseneck & Podium Microphones
Unit of Measure EACH
Shipping Weight 1.39 lbs.
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