Shure ULXD4Q (K51) 4-Channel Wireless Receiver

• Four receivers in a rugged 1RU metal chassis with internal power supply
• Up to 64 MHz tuning range (region dependent)
• Optimized scanning automatically finds, and prioritizes the cleanest frequencies to be manually deployed to transmitters over IR sync
• Bodypack Frequency Diversity ensures uninterrupted audio for mission critical applications
• Individual gain controls (up to 60 dB), LED meters, and XLR outputs for each channel
• Audio summing routes two or more audio channels to combinations of XLR receiver outputs, controlled via channel gain adjustment
• Ethernet networking for: streamlined frequency coordination and deployment across multiple receivers; compatibility with Wireless Workbench 6 software for advanced coordination, monitoring, and control; support for Dante™ digital networked audio
• Compatible with AMX and Crestron control systems
• Interference detection and alerts
• Intuitive front panel LCD menu and controls with various lockout options, plus audio and RF LED meters with peak indicator
• Removable half wave antennas
• 24 bit / 48 kHz digital audio
• 20 Hz - 20 kHz frequency range with flat response
• Greater than 120 dB dynamic range
• Up to 22 active transmitters in one 8 MHz TV channel; High Density mode enables up to 63 active transmitters in one 8 MHz channel
• AES-256 bit encryption equipped for secure wireless transmission

System Specifications

• RF Carrier Frequency Range: 606-670 MHz
• Working Range: 100 m ( 330 ft)
• Note: Actual range depends on RF signal absorption, reflection and interference. Note: Actual range depends on RF signal absorption, reflection and interference.
• RF Tuning Step Size: 25 kHz, varies by region
• Image Rejection: >70 dB, typical
• RF Sensitivity: -98 dBm at 10 BER
• Latency: <2.9 ms
• Audio Dynamic Range A-weighted, typical, System Gain @ +10:
  • XLR Analog Output: >120 dB
  • Dante Digital Output: 130 dB
• Total Harmonic Distortion -12 dBFS input, System Gain @ +10: <0.1%
• System Audio Polarity: Positive pressure on microphone diaphragm produces positive voltage on pin 2 (with respect to pin 3 of XLR output) and the tip of the 6.35 mm (1/4-inch) output.
• Operating Temperature Range: -18°C (0°F) to 50°C (122°F) Note: Battery characteristics may limit this range.
• Storage Temperature Range: -29°C (-20°F) to 74°C (165°F) Note: Battery characteristics may limit this range.
• Receiver Output Level
• Receiver Output Gain
  • 1/4" TRS: +18 dB
  • XLR (line setting): +24 dB
  • XLR (mic setting): -6 dB This setting matches a typical wired SM58 audio signal level

ULXD4Q Specifications

• Weight: 3.45 kg (7.6 lbs), without antennas
• Power Requirement: 100 to 240 V AC, 50-60 Hz, 0.32 A max.
• Dimensions H x W x D: 44 x 482 x 274 mm
• Housing: steel; Extruded Aluminium
• Audio Output
  • Gain Adjustment Range: -18 to +42 dB in 1 dB steps (plus Mute setting)
  • Configuration
    • XLR: balanced (1=ground, 2=audio +, 3=audio -)
  • Impedance: 100 Ω
  • Full Scale Output
    • LINE setting: +18 dBV
    • MIC setting: -12 dBV
  • Mic/Line Switch: 30 dB pad
  • Phantom Power Protection: Yes
• Cascade Output
  • Connector Type: BNC Note: For connection of one additional receiver in the same band
  • Configuration: Unbalanced, passive
  • Impedance: 50 Ω
  • Insertion Loss: 0 dB
• Networking
  • Network Interface: Dual Port Ethernet 10/100 Mbps, 1Gbps, Dante Digital Audio
  • Network Addressing Capability: DHCP or Manual IP address
  • Maximum Cable Length: 100 m (328 ft)
• RF Input
  • Spurious Rejection: >80 dB, typical
  • Connector Type: BNC
  • Impedance: 50 Ω
  • Bias Voltage: 12 to 13 V DC, 150 mA maximum, per antenna switchable on-off