Shure Brothers Inc. UA874US Active Directional Antenna

Product Description

The SHURE BROTHERS INC. UA874US is an active directional antenna designed for use with compatible UHF wireless microphone systems operating in the 470 to 698 MHz frequency range. Active antennas incorporate an internal amplifier stage that compensates for cable losses between the antenna and the receiver, making them well suited for installations where long cable runs are required. The UA874US provides directional pickup, allowing the antenna to be aimed at a defined coverage zone to improve signal consistency and reduce interference from off-axis RF sources. Audio-visual technicians, broadcast engineers, and live-sound professionals typically specify this type of antenna for permanent installations and touring rigs.

The UA874US is intended for use in professional audio environments where reliable UHF wireless signal distribution is critical. Typical applications include houses of worship, theaters, corporate AV installations, broadcast studios, and live event production. The active design makes it a practical choice when receivers are rack-mounted at a distance from the performance or speaking area, and when antenna placement must be optimized for a specific coverage zone rather than omnidirectional reception.

Key Features

• Active design with internal amplifier to offset cable-run signal loss
• Directional pickup pattern for targeted RF coverage and reduced off-axis interference
• Operating frequency range of 470 to 698 MHz
• Suited for permanent installs and touring applications requiring remote antenna placement

Compatibility

Designed as an OEM-style active directional antenna for professional UHF wireless microphone receiver systems operating in the 470 to 698 MHz range.

Installation Notes

Installation is typically performed by a licensed audio-visual technician or systems integrator familiar with UHF RF distribution. Power down all associated wireless receivers before connecting or disconnecting antenna cables. Use appropriate low-loss coaxial cable and proper connectors to maintain signal integrity across the cable run. Follow applicable local electrical codes and manufacturer wiring guidelines when routing antenna cabling through building structures.