Lectrosonics UM400A Belt Pack Transmitter

The Lectrosonics UM400A is a professional, high-performance belt pack transmitter designed for critical wireless audio capture in film, television, broadcast, and theater. This transmitter is celebrated for its exceptional audio fidelity, robust UHF transmission, and rugged construction, making it a standard tool for production sound mixers worldwide. Operating on user-selectable frequencies within designated UHF blocks, it employs Lectrosonics' advanced analog companding technology to deliver crystal-clear audio with a wide dynamic range and minimal noise. Its robust RF output ensures a reliable wireless link even in challenging environments with long distances or potential interference, providing confidence that crucial dialogue or sound will be captured without dropouts.

Built to withstand the physical demands of production, the UM400A features a machined aluminum housing that provides durability and effective RF shielding. It is designed to interface seamlessly with a wide variety of lavalier and headset microphones via its 3.5mm locking microphone input, offering adjustable input gain to optimize levels for different sources. The transmitter includes a comprehensive LCD screen that clearly displays operating frequency, battery level, and audio modulation, allowing for easy monitoring and configuration. Powered by a single AA battery, it offers extended operational life and includes a tone-based remote mute function, enabling audio engineers to control the transmitter from the receiver. Its compact, ergonomic design ensures it can be comfortably worn and concealed on talent.

In practical application, the Lectrosonics UM400A is trusted for wiring principal actors, journalists, and presenters in the most demanding shooting conditions. Its reliability and consistent performance under pressure make it indispensable for live broadcast and high-stakes film production where audio integrity is non-negotiable. The transmitter's ability to maintain a stable, clear audio link over considerable distances, coupled with its user-friendly features and rugged build, exemplifies Lectrosonics' commitment to providing audio professionals with tools that offer uncompromising quality and operational flexibility for daily professional use.