Shure ULXD4 (K51) Wireless Receiver

• K51 Band: 606-670 MHz
• Digital Predictive Switching Diversity
• Up to 72 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
• Ethernet networking for: streamlined frequency coordination and deployment across multiple receivers; compatibility with Wireless Workbench 6 software for advanced coordination, monitoring, and control
• 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 in standard mode; High Density mode enables up to 63 active transmitters in one 8 MHz TV 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

ULXD4 Specifications

• Dimensions: 42 mm x 197 mm x 171 mm (1.65 in. x 7.75 in. x 6.75 in.), H x W x D
• Weight: 913 g (2.0 lbs), without antennas
• Housing: Steel
• Power Requirements: 15 V DC @ 0.6 A, supplied by external power supply (tip positive)
• RF Input
  • Spurious Rejection: >80 dB, typical
  • Connector Type: BNC
  • Impedance: 50 Ω
  • 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 setting)
  • Configuration
    • 1/4" (6.35 mm): Impedance balanced (Tip = audio, Ring = no audio, Sleeve = ground)
    • XLR: Balanced (1=ground, 2=audio +, 3=audio -)
  • Impedance
    • 1/4" (6.35 mm): 100 Ω (50 Ω Unbalanced)
    • XLR: 100 Ω
  • Full Scale Output
    • 1/4" (6.35 mm): +12 dBV
    • XLR: LINE setting = +18 dBV, MIC setting = -12 dBV
  • Mic/Line Switch: 30 dB pad
  • Phantom Power Protection
    • 1/4" (6.35 mm): Yes
    • XLR: Yes
• Networking
  • Power Over Ethernet (PoE): No, protected
  • Network Interface: Single Port Ethernet 10/100 Mbps
  • Network Addressing Capability: DHCP or Manual IP address
  • Maximum Cable Length: 100 m (328 ft)