Why This Guitar

Product Highlights

Focused Directional Reception — This focuses pickup on the desired signal source (the wireless transmitter) and provides excellent rejection of off-axis RF interference, resulting in a cleaner.
Switchable Onboard Amplifier — A built-in, low-noise amplifier offers four selectable gain settings (+12 dB, +6 dB, 0 dB, -6 dB) to precisely compensate for signal loss over varying lengths of coaxial cable.
Professional-Grade Reliability — Engineered for the rigors of professional use, the UA874 features the legendary build quality Shure is known for.
An integrated, switchable amplifier compensates for signal loss over long coaxial cable runs, ensuring maximum signal integrity and preventing dropouts for mission-critical audio.
Designed for touring, broadcast, and large-scale events, the UA874 features a log-periodic dipole array that provides a focused cardioid reception pattern.

Available Since: August, 2026
Item No.: 20440345
Local SKU: OS

Focused Directional Reception

The UA874 utilizes a log-periodic dipole array to create a cardioid reception pattern. This focuses pickup on the desired signal source (the wireless transmitter) and provides excellent rejection of off-axis RF interference, resulting in a cleaner, more reliable signal with fewer dropouts.

Switchable Onboard Amplifier

A built-in, low-noise amplifier offers four selectable gain settings (+12 dB, +6 dB, 0 dB, -6 dB) to precisely compensate for signal loss over varying lengths of coaxial cable. This ensures your receiver gets a strong, optimized signal, and the attenuation setting protects against overload in high-RF environments.

Professional-Grade Reliability

Engineered for the rigors of professional use, the UA874 features the legendary build quality Shure is known for. Its robust construction ensures dependable performance night after night, making it an essential tool for touring sound companies, broadcast engineers, and fixed installations in theaters and houses of worship.

BY THE NUMBERS

Technical Specifications

Hardware & Setup

Body & Build

Finish & Colour

Connector TypeBNC Female

EssentialNo

Everything you receive

What's In The Box

Shure UA874 Active Directional Antenna for Wireless Microphone Systems
Owner's Manual
Local Warranty Card

Shure

The Maker

About Shure

Shure has set enduring standards for microphones and professional audio, from legendary stage models to advanced wireless, conferencing, monitoring, and studio systems. Its products are trusted wherever speech and music must be captured clearly and consistently, including performances, broadcasts, workplaces, education, houses of worship, and content creation.

View All Shure Products

Expert answers

Questions & Answers

6 questions answered by aDawliah experts·avg response 2 hours

The UA874 is an active directional antenna designed to improve the reception quality of compatible Shure wireless microphone systems by increasing the desired signal and rejecting unwanted RF interference.

No, it is powered by a 10-15V DC bias sent from the connected Shure wireless receiver or antenna distribution system through the coaxial cable, eliminating the need for a separate power source.

Its directional cardioid pattern focuses on the area where your performers are, effectively ignoring stray RF signals coming from the sides and rear. This significantly reduces the chance of interference and signal dropouts.

The four-position gain switch allows you to boost the signal to compensate for loss in long cable runs (+6 or +12 dB) or attenuate the signal (-6 dB) to prevent receiver overload in environments with very strong RF signals.

The UA874 is specifically designed for use with Shure wireless receivers and distribution systems that provide the required 12V DC bias to power its internal amplifier. Compatibility with other brands is not guaranteed.

The antenna features an integrated threaded adapter that allows it to be mounted easily and securely onto any standard microphone stand or mounting bracket.

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