Shure BLX® Wireless Systems combine professional-quality sound with simple setup and an intuitive interface for legendary audio performance right out of the box. Precision-built and available in a variety of configurations, it’s the most accessible way to own the stage.
The BLX14/SM31 wireless headset system includes a BLX4 wireless receiver, a BLX1 bodypack transmitter, an SM31 fitness headset microphone, a power supply, a clothing clip, windscreens, and a user guide.
The SM31 cardioid condenser headset microphone features moisture-repellent construction for true performance in humid applications where corrosion is common.
Included Accessories:
1 - PS24 Power supply
1 - Clothing clip
1 - Windscreens
1 - Carrying case
Specifications
SYSTEM
Working Range: 300 ft (91 m) Line of sight
Audio Frequency Response: 50 to 15,000 Hz
Total Harmonic Distortion: Ref. +/-33 kHz deviation with 1 kHz tone; 0.5%, typical
Dynamic Range: 100 dB, A-weighted, typical
*Note: Depends on microphone type
BLX1
Audio Input Level (min/max): -16 dBV to +10 dBV (0 dB)
Gain Adjustment Range: 26 dB
Input Impedance: 1 MΩ
RF Transmitter Output: 10 mW, typical
Dimensions (H x W x D): 4.33 in. x 2.52 in. x 0.83 in. (110 mm x 64 mm x 21 mm)
Weight: 2.6 oz. (75 g), without batteries
Housing: Molded ABS
Power Requirements: 2 AA batteries, 1.5 V alkaline
Battery Life: up to 14 hours (alkaline)
Audio Input Level
(0dB) -20 dBV maximum
(-10dB) -10 dBV maximum
Gain Adjustment Range: 10 dB
RF Transmitter Output: 10 mW, typical
Dimensions: 8.82 in. x 2.09 in. (224 mm x 53 mm) L x Dia.
Weight: 7.7 oz. (218 g) without batteries
Housing: Molded ABS
Power Requirements: 2 AA batteries, 1.5 V alkaline
Battery Life: up to 14 hours (alkaline)
BLX4
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: -27 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 (H x W x D): 1.57 in. x 7.40 in. x 4.06 in. (40 mm x 188 mm x 103 mm)
Weight: 8.5 oz. (241 g)
Housing: Molded ABS
Power Requirements: 12–15 V DC @ 160 mA, supplied by external power supply (tip positive)