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Omnidirectional Condenser Boundary Microphone

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The AT846/O is a wide-range condenser microphone with an omnidirectional polar pattern. It is designed for unobtrusive table, ceiling or panel-mounted applications for high-quality sound reinforcement, teleconferencing, professional recording, television and other demanding sound pickup applications.

The AT846/O is equipped with UniGuard® RFI-shielding technology, which offers outstanding rejection of radio frequency interference (RFI). The microphone is RoHS compliant – free from all substances specified in the EU directive on hazardous substances.

The microphone should be placed on a flat, unobstructed mounting surface. The small diameter capsule near the boundary eliminates phase distortion and delivers clear, high-output performance.

The microphone requires 11V to 52V phantom power for operation. The microphone is enclosed in a heavy-duty die-cast case and protected by a two-layer steel mesh grille. The low-profile housing has a low-reflectance black finish. Isolators are included with the microphone for optional mechanical isolation from the mounting surface.

To mount the AT846/O in a ceiling or table top without the isolators, a 20.5 mm diameter hole is required. To mount the AT846/O with the isolators, a 23.5 mm hole is required. Place the isolators on either side of the hole to achieve mechanical isolation from the mounting surface.

  • audio technica AT846/O
  • audio technica AT846/O

AT846/O Specifications


Fixed-charge back plate, permanently polarized condenser

Polar Pattern


Frequency Response

54 ~ 20,000 Hz

Open Circuit Sensitivity

-33 dB (22.4 mV) re 1V at 1 Pa


100 Ω

Maximum Input Sound Level

131 dB SPL, 1 kHz at 1% T.H.D.

Signal-To-Noise Ratio

>69 dB, 1 kHz at 1 Pa

Phantom Power

11~52V DC, 2 mA typical


48 g


64.6mm x 30.0 mm (Long X Diameter)

Output Connector

Integral 3-pin XLRM-type

Accessories Furnished

One pair isolators


audio technica support AT846-O.pdf - Operation Manual