The Audio-Technica ES947C/FM3 Cardioid Condenser Boundary Microphone is a black, 3-pin phantom-powered microphone featuring a self-contained power module and an RGB LED ring with seven selectable colors plus an OFF setting to indicate mute status for table or panel mount applications.

The Audio-Technica ES947C/FM3 Cardioid Condenser Boundary Microphone provides a professional solution for clear, intelligible sound pickup in conferencing, recording, and monitoring applications. This phantom-powered microphone mounts unobtrusively into tabletops or panels, offering high-performance audio capture for demanding environments.
The microphone features a low-profile element with a uniform cardioid polar pattern. This design provides a 120° acceptance angle to focus on the desired sound source while minimizing unwanted ambient noise. The unit requires 11V to 52V DC phantom power for operation.
An integrated capacitive touch switch enables local muting of the microphone. To provide immediate status feedback, the ES947C/FM3 includes a highly visible two-state RGB LED ring. Users can choose from seven selectable colors or an OFF mode to customize the mute status indication.
Audio-Technica constructed the ES947C/FM3 with a rugged all-metal case and a two-layer steel mesh grille to protect the internal microphone element. The device incorporates UniGuard RFI-shielding technology, which provides outstanding rejection of radio frequency interference (RFI) to ensure clean signal transmission.
The ES947C/FM3 includes a self-contained power module with a 3-pin XLR output connector, eliminating the requirement for an external power module. The package includes a pair of rubber isolators that provide mechanical dampening to reduce the transmission of mounting-surface vibrations to the microphone.
This microphone meets TAA-compliance requirements for government and trade applications. It is also RoHS compliant, ensuring the product is free from hazardous substances specified in the EU directive.
| Element | Fixed-charge back plate, permanently polarized condenser |
| Polar Pattern | Cardioid |
| Frequency Response | 70-15,000 Hz |
| Open Circuit Sensitivity | -37 dB (0 dB = 1V/Pa, 1 kHz) |
| Output Impedance | 60 ohms |
| Maximum Input Sound Level | 134 dB SPL (1 kHz at 1% THD) |
| Dynamic Range | (typical) 110 dB (1 kHz at max SPL) |
| Signal-to-Noise Ratio | 70 dB (1 kHz at 1 Pa, A-weighted) |
| Phantom Power Requirements | 11-52V DC, 7.5 mA |
| Weight | 59 g (2.1 oz) |
| Dimensions | 38.0 mm (1.50") W x 48.0 mm (1.89") D x 84.8 mm (3.34") H |
| Output Connector | 3-pin XLRM-type |
| Accessories Included | Rubber isolators (two types), nut |
| Length | 3 In. |
|---|---|
| Width | 2 In. |
| Height | 6 In. |
| Weight | 1 lbs |
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