Audio-Technica AT831cW Cardioid Lapel Microphone for UniPak Transmitters


Featuring a rugged housing with low-reflectance finish, the Audio-Technica AT831CW Cardioid Lapel Microphone provides a clear, full sound.

The AT831CW Cardioid Lapel Microphone from Audio-Technica is the wireless belt pack version of the AT831R miniature cardioid condenser microphone. It has been designed for hands-free applications in sound reinforcement systems and for use by professional musicians, especially for pickup of acoustic guitar. The AT831CW provides improved gain before feedback that normally cannot be achieved with miniature omnidirectional microphones. Close-up voice and instrument pickup are crisp and clean, yet full sounding, while suppression of background noise is significantly improved over that of stand-mounted full-size cardioid microphones.

Audio-Technica design engineers have utilized the newest low-mass technology in the quest for superior performance. The permanent charge is now on the fixed back plate, rather than the moving element. With A-T fixed charge “back plate” construction, a gold-vaporized diaphragm just 2 microns thick (or about 0.000079") can be used. This reduces moving mass, thus improving frequency response and transient response while reducing distortion.

The AT831CW is intended for use in professional applications where remote power is available from a wireless beltpack.

The microphone element is enclosed in a rugged housing with low-reflectance finish. Internal construction is designed to minimize handling and clothing noise. An AT8417 clothing clip, AT8444 guitar adapter and AT8418 UniMount® instrument mount are provided, as well as an accessory AT8116 windscreen. The microphone is well protected by a specially designed carrying case.

FCC Consumer Alert

This disclosure informs consumers that wireless microphone users must cease any wireless microphone operations in the 600 MHz service band no later than July 13, 2020. In addition, in many instances they may be required to cease use of these devices earlier if their use has the potential to cause harmful interference to 600 MHz service licensees’ wireless operations in the band.

Most users do not need a license to operate this wireless microphone system. Nevertheless, operating this microphone system without a license is subject to certain restrictions: the system may not cause harmful interference; it must operate at a low power level (not in excess of 50 milliwatts); and it has no protection from interference received from any other device. Purchasers should also be aware that the FCC is currently evaluating use of wireless microphone systems, and these rules are subject to change. For more information, call the FCC at 1-888-CALL-FCC (TTY: 1-888-TELL-FCC) or visit the FCC's wireless microphone website.