The Shure ULXD6 is a professional wireless transmitter unit designed to interface with boundary (or "PZM"-style) microphones in the ULX-D digital wireless system. This specialized transmitter does not contain a traditional microphone capsule itself; instead, it provides power, audio conditioning, and digital transmission for a connected boundary microphone capsule, such as Shure's MX series. Its primary application is in fixed installation environments where a low-profile, unobtrusive microphone is required on conference tables, lecterns, pulpits, or stage floors for capturing meetings, lectures, ceremonies, or theatrical productions. The ULXD6 enables these boundary mics to operate wirelessly, combining the excellent acoustic advantages of boundary placement with the flexibility and neatness of a digital wireless link.

The transmitter is engineered to deliver clean, reliable audio by supplying plug-in power to the attached boundary mic capsule and digitizing the signal with high fidelity before transmission. It operates within Shure's ULX-D digital ecosystem, which offers exceptional audio quality, robust RF performance with automatic frequency management, and encrypted transmission for secure communications. The unit features a low-profile design to minimize visual distraction and includes a secure locking connector to prevent accidental disconnection of the microphone capsule. Status LEDs provide clear indication of power, audio activity, and RF link integrity.

As part of a ULX-D system, the ULXD6 is managed alongside other system components through Shure's intuitive Wireless Workbench software, allowing for remote monitoring, control, and frequency coordination. This transmitter exemplifies the professional integration of specialized microphone techniques into modern digital wireless systems, providing installers and sound engineers with a reliable, high-performance solution for capturing clear audio in applications where microphone visibility and cable management are critical concerns.