ULX-D
Digital Wireless Systems
SKU: ULX-D
Coming in Fall 2025 - Expanded Frequency Bands for ULX-D
As announced in June 2025, ULX-D components will ship with expanded frequency bands for greater geographical coverage - up to 166 MHz wide (regionally dependent).
ULX-D components with expanded frequency bands, including ULXD1 bodypack transmitters, ULXD2 handheld microphone transmitters, ULXD4D Dual Receivers and ULXD4Q Quad Receivers will be shipping in Fall 2025, for use in more locations with fewer frequency variations to manage.
- Extended 20 Hz – 20 KHz frequency range with totally flat response
- 24 bit / 48 kHz digital audio
- Over 120 dB dynamic range, 130 dB (typical) using Dante™ digital networked audio
- Shure Gain Ranging optimizes dynamic range for any level of input source
- Built-in limiter circuitry prevents digital audio clipping
- Wireless Workbench 6: The ULX-D is compatible with Wireless Workbench 6 software for advanced frequency coordination, monitoring, and control.
- Wireless channel efficiency – 22 active transmitters per 8 MHz TV channel. In High-Density mode, up to 63 active transmitters can operate within an 8 MHz TV channel with no degradation in audio quality.
- For ease of use, optimised scanning automatically finds, prioritises, and selects the cleanest frequencies available.
- Interference detection provides instant alerts
- AES-256-bit encryption offers unbreachable privacy and eliminates stray RF interference by only allowing the encrypted signal through to the receiver
- Advanced lithium-ion battery technology provides an extended run time over alkaline batteries, up to 9 hours of continuous use, with detailed tracking of battery health status.
- Transmitters and receivers display remaining battery life in hours and minutes, with an accuracy of within 15 minutes.
- Ethernet networking allows for streamlined setup across multiple receivers.
- Removable half wave antennas
- Up to 72 MHz overall tuning range (region dependent)
- Up to 60 dB of adjustable system gain
- Rugged metal housing on both transmitters and receiver
- Selectable 1, 10, and 20 mW transmitter RF output power
- Transmitters offer AA alkaline backwards compatibility
What digital wireless audio quality does it offer?
Shure digital processing enables ULX-D to deliver pure, clear, and accurate reproduction of source material. An extended 20 Hz – 20 kHz frequency range, combined with a flat response, captures every detail with clarity and presence, along with an incredibly accurate low-end and transient response. A wide dynamic range of over 120 dB offers excellent signal-to-noise performance.
Proprietary Shure Gain Ranging optimises the system’s dynamic range for any input source, eliminating the need for transmitter gain adjustments
Which components does the ULX-D comprise?
Receiver options
- Ethernet networking allows for streamlined setup across multiple receivers.
- ULXD4 Wireless Receiver: Half rack
- ULXD4D Dual Channel Wireless Receiver: Full rack
- ULXD4Q Quad Channel Wireless Receiver: Full rack
- ULXD4D (Dual) and ULXD4Q (Quad) receivers incorporate an extensive set of additional features:
- Bodypack Frequency Diversity
- RF cascade ports
- Internal power supply
- Audio output channel summing, to route audio to multiple outputs
- Dante™ digital networking for multi-channel audio over Ethernet
- Dual Ethernet ports
- Bodypack Frequency Diversity safeguards against loss of audio signal, whether caused by RF interference or by power loss in a transmitter, to ensure uninterrupted audio for mission-critical applications. The same audio source is sent from two transmitters with different radio frequencies. If problems occur with the reception of one frequency, ULX-D dual and quad receivers continue to provide flawless audio by automatically switching to the clean frequency. Switching between channels occurs in milliseconds, without any perceivable interruption for users.
Transmitter options
- ULXD1 Wireless Bodypack Transmitter: The ULXD1 is compatible with a selection of Shure Lavalier, headset, and clip-on instrument microphones.
- ULXD2 Wireless Handheld Transmitter: To tailor the sound for specific purposes, the ULXD2’s microphone cartridge is interchangeable with the full range of Shure dynamic and condenser cartridges, which offer a diverse set of sound characteristics and polar patterns.
Other components
Wireless Workbench 6: The ULX-D is compatible with Wireless Workbench 6 software for advanced frequency coordination, monitoring, and control.
What third-party systems is it compatible with?
The ULX-D offers seamless integration with AMX and Crestron media control systems.
What are the ULX-D’s wireless features?
The ULX-D delivers class-leading wireless channel efficiency (region-dependent) and signal stability. Minimised intermodulation distortion allows significantly more transmitters to operate simultaneously on each channel.
In standard mode, up to 22 transmitters can operate in an 8 MHz TV channel. However, all receivers offer High-Density mode for applications that require high channel counts, significantly increasing the number of simultaneous channels possible within a single frequency band. In High Density mode, up to 63 active transmitters can operate within an 8 MHz TV channel with no degradation in audio quality.
For ease of use, optimised scanning automatically finds, prioritises, and selects the cleanest frequencies available. Interference detection provides instant alerts if the system encounters interference.
For applications where secure transmission is required, ULX-D offers Advanced Encryption Standard (AES) 256-bit encrypted signal for complete privacy. This helps reduce RF interference by allowing only the encrypted signal through to the receiver.
Advanced lithium-ion battery technology provides an extended run time over alkaline batteries, up to 12 hours of continuous use, with detailed tracking of battery health status. Lithium-ion chemistry and intelligent Shure battery circuitry result in rechargeable batteries with no memory effect, such that a complete discharge is never necessary to maintain battery health. Transmitters and receivers display remaining battery life in hours and minutes, accurate to within 15 minutes.
Shure Product Benefits
ULX-D pushes wireless audio further. More streamlined. Higher density. Up to 47 systems running simultaneously within 6 MHz. That’s one reason it’s become the standard bearer for installed digital wireless. And you can hear it in crystal clear performances around the world.
- Multiple spectrum options, including VHF, UHF, 900 ISM, 1.2 GHz (Japan only), and 1.5 GHz and 1.8 GHz (Europe only)
- Multiple transmitter types including handheld, bodypack, boundary, and gooseneck options
- Choice of receiver type (single, dual, or quad)
- Monitoring and control functionality from Wireless Workbench® 6, SystemOn, and ShurePlus™ Channels apps.
- Dual and quad receivers include DANTE™ digital audio networking
- Dante Domain Manager (DDM) compatible for managing enterprise-wide Dante audio network deployments
True to the source
The 24-bit digital audio and the wide frequency response capture the sound as clearly and accurately as it was produced.
Scalable control
The network is always yours to command with proven Shure tools like Wireless Workbench®, SystemOn, Axient Spectrum Manager, as well as AMX & Crestron integration and Dante audio.
Secure sound
Confidentiality is ensured via AES-256 encryption that generates a randomised key for each use.
Networked, intelligent charging
ULX-D transmitters use either AA batteries or our intelligent rechargeable solutions for up to 9 hours of use. Battery life and charge status can be monitored remotely from Shure software. So power is always on your side.

Related Products
Components
Accessories
Reviews
Further Reading
All About Wireless: Waves and Spectrum
As governments around the world sell off portions of the spectrum, it is becoming important for audio engineers to have a thorough understanding of wireless microphone and IEM technologies. For this reason, Shure have partnered with Entertainment Technology Asia to present a series covering RF Engineering theory.