Shure BLX24RE/SM58-K14 Wireless Microphone System

Shure BLX24RE/SM58-K14 Rack-Mount Wireless Vocal System

The Shure BLX24RE/SM58-K14 is a professional wireless system that combines world-class design and construction with simple setup and operation. This kit is designed for rack-mounting into standard audio racks, making it ideal for fixed installations, venues, and touring applications. The heart of the system is the BLX4R receiver, featuring a robust metal chassis, an LCD display with detailed RF and Audio level indication, and detachable antennas that allow for the use of antenna splitters.

The included handheld transmitter features the legendary SM58 dynamic cardioid capsule, an industry standard for vocal performance, ensuring warm and clear sound and excellent resistance to background noise. The system operates in the K14 frequency band (614–638 MHz) and uses the "QuickScan" frequency selection feature, which finds the best open frequency with a single touch in case of interference.

Key Features

• Receiver: BLX4R – metal chassis, rack-mountable, with LCD display.
• Capsule: Integrated SM58 cardioid dynamic capsule, optimized for vocals.
• Frequency Band: K14 (614–638 MHz).
• Setup: "QuickScan" one-touch function quickly finds the best available frequency.
• Antennas: Detachable 1/4 wave antennas (allows for the use of antenna distribution systems).
• Indication: Adjustable output level and dual-color audio status LED indicator.
• Number of Systems: Up to 12 compatible systems per frequency band (region-dependent).
• Operating Range: Up to 100 meters (line of sight).

Technical Specifications

• System Type: Analog wireless UHF system
• Frequency Band: K14 (614–638 MHz)
• Audio Frequency Response: 50 Hz – 15,000 Hz
• Dynamic Range: 100 dB (A-weighted)
• Total Harmonic Distortion (THD): 0.5% (typical)
• Operating Distance: Up to 100 m
• Receiver Outputs: XLR Male connector and 6.3 mm Female connector
• Output Impedance (XLR): 200 Ω
• Output Impedance (6.3 mm): 50 Ω
• RF Sensitivity: -105 dBm
• Transmitter Output Power: 10 mW
• Battery Life: Up to 14 hours (with 2 x AA alkaline batteries)
• Receiver Dimensions (Height x Width x Depth): 45 x 198 x 163 mm
• Receiver Weight: Approx. 0.998 kg
• Transmitter Weight: Approx. 0.218 kg (without batteries)

Included in the Box

• 1 x BLX4R Rack-mountable receiver
• 1 x BLX2 Handheld transmitter with SM58 capsule
• 1 x Single and dual rackmount kit
• 2 x 1/4 wave antennas
• 1 x Microphone clip
• 1 x Power supply
• 2 x AA batteries
• 1 x User guide

Intended Use

• Professional audio installations (cultural centers, schools, places of worship).
• Touring applications (due to the robust metal chassis).
• Vocalists and presenters seeking a reliable, rack-mountable solution.