ULX-D™ Digital Wireless Systems

Shure ULX-D™ Digital Wireless offers uncompromising 24-bit audio clarity and extremely efficient RF performance with single, dual, and quad channel receivers for any size professional sound reinforcement application.

Shure ULX-D™ Digital Wireless offers uncompromising 24-bit audio quality and RF performance, with intelligent, encryption-enabled hardware, flexible receiver options, and advanced rechargeability options for professional sound reinforcement.

A breakthrough in wireless audio quality, Shure digital processing enables ULX-D to deliver the purest reproduction of source material ever available in a wireless system, with a wide selection of trusted Shure microphones to choose from. Extended 20 Hz – 20 KHz frequency range and flat response captures every detail with clarity, presence, and incredibly accurate low end and transient response. With greater than 120 dB, ULX-D delivers wide dynamic range for excellent signal-to-noise performance. Optimized for any input source, ULX-D eliminates the need for transmitter gain adjustments.

ULX-D sets a new and unprecedented standard for spectral efficiency and signal stability. The intermodulation performance of ULX-D is an incredible advancement in wireless performance, enabling a dramatic increase in the number of simultaneous active transmitters on one TV channel. Rock-solid RF signal with zero audio artifacts extends over the entire range. For applications where secure wireless transmission is required, ULX-D offers Advanced Encryption Standard (AES) 256-bit encrypted signal for unbreakable privacy.

For scalability and modular flexibility, ULX-D receivers come in single, dual, and even quad channel versions. The dual and quad channel receivers offer conveniences such as RF cascade, internal power supply, bodypack frequency diversity, audio output channel summing, and DANTE™ digital networking for multi-channel audio over Ethernet. All receivers offer High-Density mode for applications where high channel counts are needed, greatly increasing the amount of simultaneous channels possible over one frequency band.

Advanced Lithium-ion rechargeability provides extended transmitter battery life over alkaline batteries, battery life metering in hours and minutes accurate to within 15 minutes, and detailed tracking of battery health status.

Generations ahead of any other available system in its class, ULX-D brings a new level of performance to professional sound reinforcement. 

Uncompromising Professional Digital Wireless  

  • 24-bit/48 kHz digital audio that delivers incredibly clear and accurate reproduction of the source material  
  • 20 Hz – 20 kHz frequency range with flat response
  • Greater than 120 dB dynamic range through the analog outputs
  • 130 dB dynamic range (typical) using Dante™digital networked audio
  • 60 dB of adjustable system gain easily accessible from the receiver front panel
  • No transmitter gain adjustments needed - optimized for any input source
  • Wide selection of trusted Shure Microphones

Extremely Efficient and Reliable RF Performance  

  • Up to 72 MHz overall tuning range (region dependent)
  • Up to 17 active transmitters in one 6 MHz TV channel (23 on an 8 MHz TV channel)
  • High Density mode enables up to 47 active transmitters in one 6 MHz TV channel (63 in one 8 MHz TV channel), with no audio quality degradation
  • Rock-solid signal stability with no audio artifacts over the entire 100 meter line-of-sight range using standard supplied ½ wave antennas
  • Selectable 1, 10, and 20 mW transmitter RF output power (comparable to 5x the analog RF output power equivalent)
  • Optimized scanning automatically finds, prioritizes, and selects the cleanest frequencies available

Scalable, Intelligent Hardware 

  • Single (half-rack), Dual and Quad (full-rack) receiver form factors for any size installation
  • AES 256-bit encryption equipped for secure wireless transmission
  • Ethernet networking for streamlined setup across multiple receivers
  • Wireless Workbench® 6 software compatible for advanced frequency coordination, monitoring, and control
  • AMX/Crestron control
  • AXT600 Axient™ Spectrum Manager compatibility
  • Rugged metal housing on both transmitters and receiver
  • Dual and Quad receivers additionally feature:
    • RF cascade ports, internal power supply, and dual Ethernet ports
    • DANTE™ digital networked audio over Ethernet
    • Bodypack Frequency Diversity ensures uninterrupted audio for mission-critical applications.
    • Audio summing routes audio signal to multiple outputs

Shure Advanced Power Management

  • Adapted from industry-leading Axient™ rechargeable technology
  • Lithium-Ion chemistry and intelligent Shure battery circuitry results in rechargeable batteries with zero memory effect and precision metering. 
  • Provides ULX-D transmitters with unmatched 11+ hours of performance time
  • Transmitters and receivers display remaining battery life in hours and minutes accurate to within 15 minutes 
  • AA backwards compatibility


ULXD4D Dual Channel Wireless Receiver

The Shure ULXD4D Dual Channel Digital Wireless Receiver offers two channels of uncompromising audio quality, RF signal stability, and advanced setup features in a rugged single rack unit.

ULXD4Q Quad Channel Wireless Receiver

The Shure ULXD4Q Quad Channel Digital Wireless Receiver offers four channels of uncompromising audio quality, RF signal stability, and advanced setup features in a rugged single rack unit.

ULXD4 Wireless Receiver

The Shure ULXD4 is a half-rack, networkable wireless receiver for use with ULX-D Digital Wireless Systems.



Band Range(MHZ) Transmitter Output (mW)
AB A: 770.250 to 805.750
B: 806.125 to 809.750
JB 806 to 810 1/10
G50 470 to 534 1/10/20
G51 470 to 534 1/10/20
G52 479 to 534 1/10
H50 534 to 598 1/10/20
H51 534 to 598 1/10/20
H52 534 to 565 1/10
J50 572 to 636 1/10/20
J51 572 to 636 1/10/20
L50 632 to 696 1/10/20
L51 632 to 696 1/10/20
L53 632 to 714 1/10/20
P51 710 to 782 1/10/20
Q51 794 to 806 1/10/20
R51 800 to 810 1/10/20
X51 925 to 937.5 1/10


SB900A Rechargeable Battery

Shure Lithium-Ion Rechargeable Battery. Works with PSM®300 (P3RA only), PSM®900 (P9RA only), PSM®1000, UR5 Portable Diversity Receiver, QLX-D™ Digital Wireless Systems, and ULX-D™ Digital Wireless Systems.

System technical specifications

  • Compatible systems per frequency band: 67
  • Auto Setup Features: Scan/Group Scan/Sync
  • Audio Reference Companding: No
  • Included Antennas: Remoteable 1/2-wave
  • Antenna Options: Yes
  • PC Control: Yes
  • Receiver Network Ability: WWB6
  • Rack Hardware: Included
  • Case: No
  • Transmitter Display: Backlit multi-function LCD
  • Receiver Display: Backlit multi-function LCD + LEDs
  • Battery, Endurance: @ 10 mW, SB900: >12 h / 2AA Alkaline: 11 h
  • Environment: Conference centre, hotel, house of worship, schools

Further Technical Specs

RF Carrier Range 470–932 MHz, varies by region (See Frequency Range and Ouput Power table)
RF Tuning Step Size 25 kHz, varies by region
RF Sensitivity -98 dBm at 10-5 BER
Audio Frequency Response ULXD1: 20 Hz – 20 kHz (±1 dB)
ULXD2: 30 Hz – 20 kHz (±1 dB)
Note: Dependent on microphone type
Total Harmonic Distortion
−12 dBFS input, System Gain @ +10
Operating Temperature Range -18°C (0°F) to 50°C (122°F)
Note: Battery characteristics may limit this range.

Wireless Workbench 6 (Click Here for Details)

ShurePlus™ Channels App (Click Here for Details)

Release Notes