About the Shure BLX14/SM31

Product highlights:
- wireless headworn mic system with bodypack transmitter and single-channel receiver
- operating range: 300' (line of sight)
- transmitter LED indicates battery status
- locking transmitter and receiver controls
Electronic Features:
- receiver XLR and 1/4" outputs
- frequency response: 60-20,000 Hz
- gain adjustment range: 26 dB
General Features:
- dimensions:
- BLX1: 9/16" diameter x 1/2" length
- BLX4: 7"W x 1-1/2"H x 4-5/8"D
- weight:
- BLX1: 1.59 oz.
- BLX4: 8.5 oz.
- warranty: 2 years
- MFR # BLX14/SM31-H10
- Item # 183B143110
- California customers: Please click here for your Proposition 65 WARNING.
What's in the box:
Shure BLX14/SM31 owner's manual
If you need assistance accessing this owner's manual, please give us a call.- BLX4 Single-channel receiver (frequency band H10)
- BLX1 Bodypack transmitter (H10)
- SM31FH headset microphone with attached 45" cable (TA4F plug)
- 2 Foam windscreens
- Clothing clip
- PS24US power supply (12V 400mA)
- 2 AA batteries
- User Guide (BLX system)
- User Guide (SM31FH)
- Limited Warranty sheet
More details on the Shure BLX14/SM31

Product Research
Features
Overview: The Shure BLX14/SM31 Wireless Microphone System consists of the BLX4 Wireless Receiver, the SM31FH Fitness Headset Condenser Microphone and the BLX1 bodypack transmitter. You can operate up to 12 compatible systems per frequency band (depending upon your region). This system operates on the H10 frequency band (542 to 572 MHz), and has a transmitting range of approximately 300 feet.
BLX4: The BLX4 Single Channel Wireless Receiver features one-touch QuickScan frequency selection to help you find the best open frequency for less interference. You can also manually change the group and channel assignments, if needed. It has an XLR mic output, as well as a 1/4" instrument-level output jack. The BLX4 is simple to set up, and has a microprocessor-controlled internal diversity antenna system. It has two LED indicators: an Audio LED to indicate the strength of the incoming signal (glows green for normal and red for overload), and a Ready LED to indicate the system is ready for use and receiving the transmitter signal. It is powered by the supplied 12-volt DC power supply.
SM31FH Mic: The SM31FH Fitness Headset Condenser Microphone is a water-resistant headset microphone for use with a wireless bodypack transmitter. It features hydrophobic materials and a moisture-repelling cartridge housing, making it ideal for fitness instructors and in situations where the microphone may be exposed to moisture. It has a unidirectional cardioid polar pattern provides excellent off-axis rejection for higher gain-before-feedback when used with a stage monitor. The flexible gooseneck design lets you adjust the microphone to the ideal spot. The SM31FH comes with two foam windscreens and a clothing clip to keep the cable secure. The 45" cable is terminated by a 4-pin TA4F connector that plugs into the BLX1 bodypack transmitter.
BLX1: The SM31FH is paired with the BLX1 bodypack transmitter. It is powered by 2 "AA" alkaline batteries (included), which provide approximately 14 hours of battery life. The BLX1 has independent group and channel buttons for easy setup. The transmitter has a convenient clip for attaching it to a belt or pocket.
Specifications:
- Frequency Response:
- BLX4 Receiver/BLX1 Transmitter: 50-15,000 Hz
- SM31FH: 45-20,000 Hz
- Maximum SPL (SM31FH): 145 dB
- Output Impedance (SM31FH): 600Ω
- Gain Adjustment Range (BLX1): 26dB
- RF Transmitter Output (BLX1): 10mW, typical
- Dimensions/Weight:
- BLX4: Width 6.985", Height 1.475", Depth 4.584", Weight 8.5 ounces
- SM31FH: Diameter 0.538", Length 0.5", Weight 2.11 ounces
- BLX1: Width 2.52", Height 4.33", Depth 0.83", Weight 2.6 ounces
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