Product Highlights
Handheld Wireless Microphone Transmitter & BLX4 Single Channel Receiver.
Shure Handheld system w/ BLX2/B58 and BETA58A Supercardi oid Mic Freq. H8 Shure Handheld system w/ BLX2/B58 an...
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Shure BLX2/B58 Handheld System

Handheld Wireless Microphone Transmitter & BLX4 Single Channel Receiver

BLX4 - Single Channel Receiver

Single channel wireless receiver with microprocessor-controlled internal antenna diversity.

The durable BLX4 features simple setup, intuitive controls, and microprocessor-controlled internal antenna diversity. One-touch QuickScan frequency selection quickly locates the best open frequency in case of interference. For use with BLX® Wireless Systems.

Key Features:

  • XLR and ¼" output connectors
  • Two-color audio status indicator LED
  • Green:  Normal audio levels
  • Red:  Excessive audio levels (overload / clipping)

BLX2 / B58 - Handheld Wireless Microphone Transmitter

Featuring an integrated BETA 58A® microphone cartridge, the BLX2/B58 Handheld Wireless Microphone Transmitter delivers wireless audio with professional clarity and reliability.

Key Features:

  • Integrated microphone capsule design
  • Lightweight, rugged construction
  • -10 dB gain attenuation
  • Works with BLX® Wireless Systems
  • Offers up to 14 hours of continuous battery life with 2 AA batteries
  • Includes BLX2/B58, microphone clip, 2 AA batteries, and user guide

What's Included

BLX2/B58 Handheld Wireless Transmitter with Beta 58A Microphone Cartridge (H8: 518 - 542 MHz)
BLX4 Single-Channel Wireless Receiver (H8: 518 - 542 MHz)
Power Supply
2x AA Batteries
Padded Zipper Case
Microphone Clip
Limited 2-Year Warranty


Product Specifications

BLX4 Single-Channel Wireless Receiver

Output 1x XLR Output
1x 1/4" (6.35 mm) Output
Output Impedance XLR: 200 ohms
1/4": 50 ohms
Audio Output Level XLR Connector: -27 dBV into 100 kOhms Load (Reference +/-33 kHz with 1 kHz Tone)
1/4": -13 dBV into 100 kOhms Load
(Reference +/-33 kHz with 1 kHz Tone)
RF Sensitivity -105 dBm for 12 dB SINAD, Typical 
Image Rejection >50 dB, Typical 
Housing Molded ABS 
Power Requirement 12 to 15 V DC @ 160 mA, Supplied by External Power Supply (Tip Positive) 
Dimensions (HxWxD) 40 x 188 x 103 mm (1.5 x 7.4 x 4.1") 
Weight 241 g (8.5 oz)

BLX2/B58 Handheld Wireless Transmitter


Audio Input Level 0 dB Gain: -20 dBV Maximum
-10 dB Gain: -10 dBV Maximum
Gain Adjustment Range 10 dB 
RF Output 10 mW, Typical (Varies by Region) 
Power Requirement 2x LR6 AA Batteries
1.5 V Alkaline 
Housing Molded ABS 
Dimensions (Ø x L) 53 x 224 mm (2.1 x 8.8") 
Weight 218 g (7.7 oz) 


Type Dynamic (Moving Coil) 
Frequency Response 50 Hz to 16 kHz 
Polar Pattern Supercardioid, rotationally symmetrical about microphone axis, uniform with frequency 
Output Level Open Circuit Voltage: -51.5 dBV/Pa* (2.6 mV) *1 Pa = 94 dB SPL 

Questions & Answers

Shure Handheld system w/ BLX2/B58 and BETA58A Supercardi oid Mic Freq. H8

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