Sound Devices A20-Monarch Wideband Omnidirectional Antenna

Improve UHF System Performance with a Wideband Omnidirectional Antenna
The Sound Devices A20-Monarch is a wideband omnidirectional antenna designed to deliver stable and extended UHF wireless reception across the full 470 to 1525 MHz frequency range. Whether you're working on a mobile cart, rigging a bag system, or setting up in a fixed studio, the A20-Monarch gives you consistent signal performance with wideband compatibility, making it an essential antenna for modern RF workflows.

Engineered to Cover the Entire A20-Nexus Spectrum
Specifically designed to match the full tuning capabilities of Sound Devices' A20-Nexus receiver, the A20-Monarch ensures you can operate across global UHF bands without changing antennas. It supports professional productions that require broad spectral agility for frequency coordination, multichannel systems, and environments where spectrum congestion or regulatory limits require maximum flexibility.

Superior Return Loss for Reliable Reception
With better than 15 dB return loss throughout its entire frequency range, the A20-Monarch minimizes signal reflections and transmission inefficiencies, ensuring a clean RF path from antenna to receiver. This improves overall system reliability and helps reduce interference or dropouts in mission-critical audio applications, especially in high-traffic wireless environments like festivals, stadiums, and large-scale broadcast setups.

Bag and Cart Friendly Mounting Options Included
The included articulating arm and universal clamp make it easy to mount the A20-Monarch on a variety of surfaces—whether you’re working from a sound cart, boom rig, or portable bag system. Its lightweight construction makes it suitable for both mobile and stationary setups, and the mounting hardware gives you plenty of flexibility to adjust positioning for optimal line-of-sight reception.

Compatible with A20-Nexus and Other UHF Receivers
While it pairs perfectly with the Sound Devices A20-Nexus receiver, the A20-Monarch is not limited to one ecosystem. Its wideband capability and standard RF connectors make it compatible with a wide range of third-party wireless systems, giving you added value whether you're using it with Sound Devices gear or integrating it into a mixed-brand workflow.

Designed for Road Use and Professional Systems
Built with production environments in mind, the A20-Monarch holds up to the demands of professional field use. Its compact design, easy mounting, and included RF cables—one 30" BNC-to-BNC and one 18" BNC-to-SMA—provide everything needed to get up and running fast on any job site.