The Shure QLXD24/B58 is a digital wireless handheld microphone system that is part of Shure’s QLX-D line of digital wireless systems.

Shure QLX-D Digital Wireless delivers defined, streamlined performance with transparent 24-bit digital audio. Combining professional features with simplified setup and operation, QLX-D offers outstanding wireless functionality for demanding live sound events and installations.

QLX-D delivers outstanding wireless functionality ideal for mid-size events and installations in businesses, hotels, and government offices with conferencing spaces; schools, houses of worship, and live performance spaces.

Shure QLXD24/B58 Includes:

• QLXD2 Handheld Transmitter with BETA58A Cartridge
• QLXD4 Receiver 
• Battery Contact Cover
• Two (2) Half-Wave Antennas
• Two (2) BNC Cables
• Two (2) BNC Bulkhead Adapters
• Zipper Bag
• Rackmount Kit
• User Guide

Shure QLXD24/B58 Features:

• Transparent 24-bit digital audio captures every performance detail
• Extended 20 Hz – 20 kHz frequency range (microphone-dependent)
• Over 120dB of dynamic range eliminates transmitter gain adjustment
• Wide 64 MHz tuning bandwidth (region-dependent)
• Up to 17 compatible systems per 6 MHz TV channel
• Compatible with Shure Wireless Workbench 6 Control Software
• Remote control from an iOS device via ShurePlus Channels Mobile App
• AES-256 encryption for secure wireless transmission
• Professional-grade all metal construction

Shure QLXD24/B58 Specifications:

Overall System

• RF Carrier Range:  470–937.5MHz, varies by region
• Working Range:  100 m (328 ft)
  • 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, 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 (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.

QLXD4 Receiver

• Dimensions (H×W×D):  1.63″ × 7.75″ × 5.94″ (41mm × 197mm × 151mm)
• Weight:  1.71 lbs. (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 Ohms
• 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 Ohms (50 Ohms Unbalanced)
    • XLR:  100 Ohms
  • 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:  328 ft (100 m)

QLXD2 Wireless Handheld Transmitter

• BETA58A Cartridge Polar Patter:  Supercardioid
• Frequency Response:  50 Hz – 16 kHz
• Mic Offset Range:  0 to 21 dB (in 3 dB steps)
• Battery Type:  Shure SB900 Rechargeable Li-Ion or AA batteries 1.5 V
• Battery Runtime @ 10 mW:  Shure SB900: up to 10 hours; Alkaline: up to 9 hours
• Dimensions (LxDia.):  10.1″ x 2.0″ (256 mm x 51 mm)
• Weight:  12.2 oz. (347 g), without batteries
• Housing:  Machined aluminum
• Audio Input:
  • Configuration:  Unbalanced
  • Maximum Input Level (1 kHz at 1% THD):  145 dB SPL (SM58), typical
    • Note: Dependent on microphone type
• RF Output:
  • Antenna Type:  Integrated Single Band Helical
  • Occupied Bandwidth:  < 200 kHz
  • Modulation Type:  Shure proprietary digital
  • Power:  1 mW or 10 mW