Shure QLXD4 (K51) Wireless Receiver

• Up to 72 MHz tuning bandwidth (region dependent)
• Up to 168 compatible channels per frequency band (region dependent)
• Digital predictive switching diversity ensures solid RF connection
• Automatic channel scan quickly finds the cleanest frequency
• IR sync deploys selected frequency to transmitter
• Ethernet networking provides streamlined setup across multiple receivers
• Networked channel scan configures open frequencies for all connected receivers
• AES 256-bit encryption for secure wireless transmission
• Up to 60 dB of adjustable audio gain
• High-contrast LCD menu and controls with lockout feature
• Audio and RF LED meters with peak indicator
• Detachable ¬Ω wave antennas
• Mic / line switchable XLR output
• ¼" instrument output
• Durable steel construction with brushed finish
• Professional-grade rack hardware included
• Compatible with Shure Wireless Workbench 6 control software
• Remote monitoring and control from iOS devices via ShurePlus™ Channels app

System Specifications

• RF Carrier Range: 174 - 216 MHz, 470 - 865 MHz, 1492 - 1525 MHz, 1785 - 1805 MHz, varies by region
• Working Range: 100 m 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: -97 dBm at 10-5 BER
• Latency: <2.9 ms
• Audio Frequency Response:
  • QLXD1: 20 Hz - 20 kHz (¬±1 dB)
  • QLXD2: Note: Dependent on microphone type
• Audio Dynamic Range System Gain @ +10: >120 dB, A-weighted, typical
• 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 to 50 °C Note: Battery characteristics may limit this range
• Storage Temperature Range: -29 °C to 74 °C Note: Battery characteristics may limit this range

QLXD4 Specifications

• Dimensions: 41 x 197 x 151 mm, H x W x D
• Weight: 777 g, without antennas
• Housing: Steel
• Power requirements: 12 V DC @ 0.4 A, supplied by external power supply (tip positive)
• RF Input
  • Spurious Rejection: > 80 dB, typical
  • Connector Type: BNC
  • Impedance: 50 Ω
• Audio Output
  • Gain Adjustment Range: -18 to +42 dB in 1 dB steps
  • 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
  • Network Interface: Single Port Ethernet 10/100 Mbps
  • Network Addressing Capability: DHCP or Manual IP address
  • Maximum Ethernet Cable: Length 100 m