The BLX Vocal Wireless System from Shure joins world-class design and construction with simple and easy setup and operation, featuring QuickScan frequency selection and the industry-standard SM58® vocal microphone capsule for warm, clear vocal reproduction. Legendary sound and performance, right out of the box.

Included: BLX4R single channel half-rack wireless receiver with rack mount kit; BLX2
handheld transmitter with integrated SM58® cardioid dynamic microphone capsule; microphone clip; PS23 power supply and WA621 color id caps (optional accessories).

BLX2 Handheld Transmitter:

• Integrated microphone capsule design, featuring trusted Beta 58A
• -10 dB gain attenuation
• Lightweight, rugged construction
• Color ID caps (available separately)

BLX4R Single Channel Half-rack Receiver:

• One-touch QuickScan frequency selection quickly locates the best open frequency (in case of interference)
• Up to 12 compatible systems per frequency band (region-dependent)
• XLR and ¼” output connectors
• Adjustable audio output level
• Removable antennas for quick antenna setup
• LCD Display with detailed RF and audio metering
• Rack mount kit included

• Compatible systems per frequency band: 12
• Auto Setup Features: Group Scan/ Channel Scan
• Audio Reference Companding: Yes
• Included Antennas: Detachable ¼ wave antenna
• Antenna Options: Yes
• PC Control: No
• Rack Hardware: Included
• Case: Molded ABS, steel
• Transmitter Display: LED
• Receiver Display: Multi-function Backlit LCD + LEDs
• Battery, Endurance: 2AA: 14 h
• Environment: Karaoke, Music Clubs, Corporation, Hotels, House of worship, Small Rental Houses, Schools

Further Technical Specs

SM58 with BLX2 Handheld Transmitter

• Audio Input Level
  gain 0dB -20 dBV maximum 
  gain -10dB -10 dBV maximum
• Gain Adjustment Range
  10 dB
• RF Transmitter Output
  10 mW, typical
  varies by region
• Dimensions
  224 mm X 53 mm dia. (8 7/8 X 2 1/8 in.)
• Weight
  218 g (7.7 oz.) (without batteries)
• Housing
  Molded ABS
• Power Requirements
  2 LR6 AA batteries, 1.5 V, alkaline
• Battery Life
  up to 14 hours (alkaline)

BLX4R Single Channel Half-Rack Receiver

• Output Impedance
  XLR connector: 200 Ω
  6.35 mm (1/4") connector: 50Ω
• Audio Output Level
  Ref. ±33 kHz deviation with 1 kHz tone
  XLR connector: –20.5 dBV (into 100 kΩ load)
  6.35 mm (1/4") connector: –13 dBV (into 100 kΩ load)
• RF Sensitivity
  -105 dBm for 12 dB SINAD, typical
• Image Rejection
  >50 dB, typical
• Dimensions
  50 mm X 198 mm X 163 mm H x W x D
• Weight without antennas
  998 g (2.2 lb.)
• Housing
  Molded ABS, steel
• Power Requirements
  12–15 V DC @ 260 mA, supplied by external power supply (tip positive)