Sound Devices A20-HH Control Ring

Customizable Control Ring for Streamlined Wireless Operation
The Sound Devices A20-HH Control 0 is a button-free control ring designed to fit seamlessly onto the A20-HH digital handheld wireless transmitter. It provides a sleek, low-profile way to monitor status without physical controls, featuring only a multicolor LED indicator for audio level and system status. Whether you need a clean look for stage use or want to avoid accidental button presses, this control ring delivers simplicity without sacrificing utility.

Ideal for Visual Monitoring in Live Environments
The integrated LED offers clear visual feedback for performers and technicians alike. This LED indicator can be programmed to reflect critical statuses like battery life, audio signal strength, RF connection, or mute status, depending on how the transmitter is configured. The absence of buttons makes this ring ideal for theatrical, broadcast, or high-movement environments where hands-off operation is essential.

Part of the A20-HH Modular System
Sound Devices designed the A20-HH Control Ring system to support a wide range of production needs. The Control 0 ring is one of several interchangeable models—others include the Control 1 with a single button, the Control 3 with three configurable buttons, and the Control Switch with a latching toggle. Each offers different levels of interaction, giving sound teams the ability to tailor control precisely to the requirements of any production.

Assign Custom Commands Through NexLink
Even without physical buttons, the A20-HH Control 0 remains fully compatible with NexLink remote control functionality. Settings such as RF power, audio mute, or power states can be remotely activated using compatible Astral-series receivers or the A20-Remote app. This keeps the talent focused on performance, while engineers maintain full operational oversight from the console.

Perfect for Broadcast and Live Stage Settings
When total reliability and simplified appearance are essential, the A20-HH Control 0 is a strong match. Its rugged design and minimalist format reduce the risk of damage or misoperation during live use. For settings where the performer doesn’t need to engage with the mic but visual signal feedback is helpful, the Control 0 is the go-to choice for clarity and control without clutter.

Designed to Fit Seamlessly with Astral-Series Gear
Like all A20-HH accessories, the Control 0 ring is built to integrate cleanly with the rest of the system. From installation to field use, its form factor and rugged build make it a durable and reliable part of your wireless microphone kit. Whether you're touring with a full band, running sound in a theater, or managing large broadcast events, this control ring keeps things clean and dependable.