Sound Devices Astral HH Digital Handheld Microphone Transmitter (470 to 1525 MHz)

Combining the renowned sound quality of Sound Devices with a global UHF tuning range (470–1525 MHz in a single unit), durable construction, and a highly adaptable design, the Sound Devices Astral HH Digital Handheld Microphone Transmitter (470 to 1525 MHz) is purpose-built to help performers achieve their best sound anywhere in the world. Ideal for international touring and fast-paced production environments, the Sound Devices Astral HH Digital Handheld Microphone Transmitter (470 to 1525 MHz) comes standard with the CD1 cardioid dynamic capsule and offers native compatibility with a wide variety of interchangeable microphone capsules.

Driven by 100% digital RF modulation and adjustable RF output from 2 to 100 mW, the Astral HH ensures extended, dependable transmission performance. Its integrated RocketAntenna technology minimizes signal loss caused by hand placement. A high-headroom, ultra-low-noise preamp delivers up to 140 dB of dynamic range along with a full 10 Hz to 20 kHz frequency response for exceptional audio clarity. GainForward architecture eliminates the need for gain adjustments on the transmitter—simply set levels at the console. The e-Paper display remains clearly visible in bright sunlight and retains information even when powered off. A button-free exterior reduces the risk of accidental changes during performances, while optional control rings allow for the addition of customizable buttons or switches.

With built-in NexLink remote control, AutoAssign for fast frequency coordination, interchangeable body shells for visual customization, and up to 10 hours of battery life, the Astral HH is designed to meet the needs of performers, sound mixers, and RF technicians working across concerts, theater, live events, houses of worship, corporate productions, cruise ships, and more. It is fully compatible with Astral ARX32, ARX16, and ARX8 digital receivers.

CD1 Mic Capsule

Drawing on decades of expertise, Sound Devices developed its first proprietary microphone capsule, the CD1—a precision-calibrated dynamic cardioid capsule.
Designed specifically for vocal performance, it delivers a smooth, consistent sound with exacting uniformity from unit to unit thanks to comprehensive factory testing and calibration.

Use Any Other Capsule

The Astral HH supports native use of third-party mic capsules, including those with Shure- or Sennheiser-style threading—no adapters required.
Both thread types are built into the design; simply flip the optional Capsule Collar to switch between standards.

Tour Globally, Find Open Frequencies

With built-in SpectraBand technology, the Astral HH offers an expansive tuning range from 470 to 1525 MHz, making it easy to find clear operating frequencies anywhere in the world.
AutoAssign streamlines setup by scanning and assigning frequencies across transmitters instantly with a single command.

RocketAntenna: No Dropouts

No more worrying about signal loss when the microphone is held at the base.
The proprietary wideband RocketAntenna maintains consistent RF performance regardless of hand position—ensuring uninterrupted transmission.

Easily Add Controls

By default, the Astral HH features a clean, control-free exterior to prevent unintended adjustments.
Optional interchangeable Control Rings allow users to add buttons or switches, which can be configured for various functions, including triggering console macros.

Make It Your Own

With quick-change components including the body shell, control ring, capsule collar, and CD1 capsule, the Astral HH can be customized to match any visual style.
Swap parts in minutes to completely transform the microphone’s appearance. For advanced customization, Sound Devices recommends Rebel Trading Company, known for custom finishes, crystal designs, and personalized branding.

Full Remote Control, Built-In

The Astral HH features integrated NexLink remote control with extended range.
Adjust frequencies or power transmitters on and off directly from the mixing console with a single command.

Adjust Gain at the Console, Not on the Wireless

GainForward technology removes the need for gain controls on both the transmitter and receiver.
Simply adjust trim at the console without compromising headroom or noise performance.

Mic Drop

Engineered for long-term durability, the Astral HH features a die-cast magnesium body, stainless-steel components, and an impact-resistant polycarbonate shell.
Each unit undergoes rigorous testing in Sound Devices’ QA lab, including drops, extreme temperatures, humidity exposure, vibration, and more.

Built-In Recorder

The Astral HH includes onboard recording with support for 32-bit float Broadcast WAV (under 4 GB) and RF64 WAV (over 4 GB) formats at 48 kHz.
This allows gain adjustments to be made in post-production without risk of clipping or low-level noise, thanks to its wide dynamic range.
Recording requires REC Only Mode; simultaneous transmission and recording are not supported.

At a Glance

• Global UHF tuning range: 470–1525 MHz

• 10+ hours runtime (at 10 mW) using 18650 Li-ion battery

• RocketAntenna design unaffected by hand placement

• Reversible Capsule Collar for Shure- and Sennheiser-style capsules

• Precision-calibrated CD1 cardioid dynamic capsule

• Long-range NexLink remote control with Astral receivers and app

• 100% digital RF modulation for extended range

• Adjustable RF output: 2–100 mW

• GainForward architecture (console-based gain control)

• 10 Hz to 20 kHz frequency response

• 140 dB dynamic range preamp

• Sunlight-readable e-Paper display (visible without power)

• Weather-resistant with extensive sealing

• USB-C for charging and pairing

• Bluetooth support for app control and pairing

• Interchangeable Control Rings

• Quick-change exterior components for customization

• Rugged construction: magnesium, stainless steel, and polycarbonate