Shure BLX4R Rack Mount Receiver (H9 Band)


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Rack-mountable and featuring rugged metal construction, the BLX4R offers simple setup and intuitive controls, and provides improved linearity and frequency response with group and channel scan. One-touch QuickScan frequency selection quickly locates the best open frequency in case of interference. Removable antennas allow for quick antenna distribution. For use with BLX Wireless Systems. Rack mount kit included.

Note: When purchasing separate wireless components, please match their frequency bands to ensure proper system operation.

Shure BLX4R Rack Mount Receiver Features:

  • XLR and ¼ output connectors.
  • Microprocessor-controlled internal antenna diversity.
  • Two-color audio status indicator LED.
  • Green: Normal audio levels
  • Red: Excessive audio levels (overload / clipping.)
  • Adjustable output level.
  • LCD display with detailed RF and audio metering.

Shure BLX4R Specifications:

Working Range
91 m (300 ft) Line of Sight
Note: Actual range depends on RF signal absorption, reflection and interference.

Audio Frequency Response
50 to 15,000 Hz
Note: Dependent on microphone type

Total Harmonic Distortion
(Ref. ±33 kHz deviation with 1 kHz tone)
0.5%, typical

Dynamic Range
100 dB, A-weighted, typical

Operating Temperature
-18°C (0°F) to 57°C (135°F)
Note: Battery characteristics may limit this range.

Positive pressure on microphone diaphragm (or positive voltage applied to tip of WA302 phone plug) produces positive voltage on pin 2 (with respect to pin 3 of low-impedance output) and the tip of the high impedance 1/4-inch output.

Output Impedance
XLR connector: 200 Ω
6.35 mm (1/4") connector: 50 Ω

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

1.65 in. X 7.80 in.X 6.42 in. (42 mm X 198 mm X 163 mm) H x W x D

(without antennas)
2.2 lbs (998 g)

Molded ABS, steel

Power Requirements
12–15 V DC @ 260 mA, supplied by external power supply (tip positive)

Each BLX4R Retail Box Includes:
(1) Shure BLX4R Rack Mount Receiver (H9 Band)
(1) 53A8611 Rack Mount Bracket
(1) 53A8612 Long Rack Mount Bracket
(1) 53B8443 Link Bracket
(1) 90AZ8100 Hardware Kit
(2) 95A8699 Antennas/BNC, 1/4 Wave
(2) 95A8994 Adapters, Bulkhead, BNC
(2) 95K2035 Cables, BNC, 22"
(1) PS24 Power supply

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