Shure ULXD4 Wireless Receiver

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

With an expansive set of professional features, including 24-bit / 48 kHz digital audio quality, efficient and intelligent RF performance, and AES 256-bit encryption, ULX Digital offers uncompromising wireless tailored for professional sound reinforcement.

• Predictive switching diversity
• High Density mode optimizes ULX-D systems to simultaneously operate significantly more channels in applications up to 30 meters
• Intelligent scanning automatically finds and deploys the cleanest frequencies to transmitters over IR sync
• Interference detection and alerts provided on both the receiver and Wireless Workbench® 6
• Front panel gain adjustment buttons provide up to 60 dB additional gain
• AES 256-bit encryption-enabled for applications where secure transmission is needed
• Ethernet networking provides streamlined setup across multiple receivers, Wireless Workbench® 6 integration, and AMX/Crestron control
• Support for frequency coordination with the Axient® Spectrum Manager
• Rugged metal chassis
• Intuitive front panel LCD menu and controls with lockout feature
• Upgraded LCD with adjustable contrast and brightness
• Audio and RF LED meters with peak indicator
• Remoteable ½ wave antennas

System Specifications

• RF Carrier Frequency Range: 470–932 MHz (varies by region)
• Operating Range: Up to 100 m (330 ft)*
• RF Tuning Step Size: 25 kHz (varies by region)
• RF Sensitivity: −98 dBm @ 10⁻⁵ BER
• Image Rejection: >70 dB (typical)
• Latency: <2.9 ms
• Audio Dynamic Range:XLR Analog Output: >120 dB (A-weighted, typical)Dante Digital Output: 130 dB
• Total Harmonic Distortion (THD): <0.1% (@ −12 dBFS input, System Gain +10)
• System Audio Polarity: Positive microphone diaphragm pressure produces positive voltage on XLR pin 2 and ¼" tip output
• Operating Temperature: −18°C to 50°C (0°F to 122°F)
• Storage Temperature: −29°C to 74°C (−20°F to 165°F)

*Actual operating range depends on RF environment, signal absorption, reflections, and interference.

Receiver Output Level

• ¼" TRS: +18 dB
• XLR (Line): +24 dB
• XLR (Mic): −6 dB (matches typical wired SM58 output level)

General Specifications

• Dimensions (H × W × D): 42 × 197 × 171 mm (1.65 × 7.75 × 6.75 in.)
• Weight: 913 g (2.0 lbs), without antennas
• Housing: Steel
• Power Requirements: 15 V DC @ 0.6 A (external power supply, center positive)

RF Input

• Connector Type: BNC
• Input Impedance: 50 Ω
• Spurious Rejection: >80 dB (typical)
• Bias Voltage: 12–13 V DC, 170 mA maximum per antenna

Audio Output

• Gain Adjustment Range: −18 to +42 dB in 1 dB steps (plus Mute)
• ¼" Output Configuration: Impedance balanced (Tip = Audio, Ring = No Audio, Sleeve = Ground)
• XLR Output Configuration: Balanced (Pin 1 = Ground, Pin 2 = Audio +, Pin 3 = Audio −)
• Output Impedance:¼" Output: 100 Ω (50 Ω unbalanced)XLR Output: 100 Ω
• Full Scale Output:¼" Output: +12 dBVXLR Line: +18 dBVXLR Mic: −12 dBV
• Mic/Line Switch: 30 dB pad
• Phantom Power Protection: Yes (¼" and XLR outputs)

Networking

• Power over Ethernet (PoE): No (protected)
• Network Interface: Single-port Ethernet, 10/100 Mbps
• IP Addressing: DHCP or Manual IP configuration
• Maximum Cable Length: 100 m (328 ft)