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The Shure BLX14/SM31 brings fitness and aerobics instructors a cost-effective wireless headset microphone system with quality sound, simple setup, intuitive operation, and dependable performance right out of the box. It includes the compact and lightweight BLX4 single-channel tabletop receiver with internal antennas, ideal for portable use.
The BLX14/SM31 also includes an SM31FH cardioid fitness headset mic with windscreen and a bodypack transmitter. The headset is specifically designed to stay comfortable and securely in place, even during the most active workouts. Moisture-repellent hydrophobic fabric helps protect the microphone capsule from sweat and humidity.
The receiver features one-touch QuickScan frequency selection to quickly search 123 available frequencies and locate a clean RF channel in case of interference. The system provides up to 14 hours of continuous use with two AA batteries, at a range up to 300'. Up to 12 mic channels can operate simultaneously in each frequency band.
Durable Fitness Headset Mic Optimized for Speech
Lightweight Bodypack Transmitter
Easy-to-Use Tabletop Receiver for Quality Audio
A Versatile System to Meet Your Needs
- The discrete MX153 sub-miniature earset mic provides exceptional clarity in spoken word applications.
- The PGA31 is a comfortable headset microphone for lectures and presentations.
- The CVL lavalier mic offers low visibility and clear vocal reproduction for discreet applications.
- Instrumentalists can attach the WB98H/C flexible gooseneck instrument microphone for brass, woodwind, and percussion applications.
- The WA302 guitar cable lets you connect the bodypack transmitter to a guitar or bass.
- The BLX2 handheld transmitter is available with three different mic capsules for presenters who prefer the flexibility of a handheld microphone.
| Wireless Transmission | Analog UHF |
| Number of RF Channels | 123 |
| Included Transmitters | 1 x Bodypack |
| Diversity | Antenna Diversity |
| RF Frequency Band | H9: 512 to 542 MHz |
| RF Bandwidth | 24 MHz |
| RF Channel Scanning | Auto-Scan |
| Max Operating Range | 300' / 91.4 m (Line of Sight) |
| Max Systems per Setup | 12 |
| Dynamic Range | 100 dBA |
| Form Factor | Tabletop |
| Antenna | 2 x Internal, Fixed |
| Number of Audio Channels | 1 |
| Audio I/O | 1 x XLR 3-Pin Male Balanced Output 1 x 1/4" TS Female Unbalanced Output |
| Audio Output Level | XLR Output: -27 dBV (Mic Level) 1/4" Output: -13 dBV (Instrument Level) |
| Frequency Response | 50 Hz to 15 kHz (Dependent on Mic) |
| Impedance | XLR Output: 200 Ohms 1/4" Output: 50 Ohms |
| Power Requirements | AC/DC Power Adapter |
| AC/DC Power Adapter | 12 to 15 VDC at 160 mA, Center-Positive (Included) |
| AC Input Power | 100 to 240 VAC, 50 / 60 Hz at 150 mA |
| Display & Indicators | 1 x Multi-Segment LED (Channel, Group) 2 x LED (AF Level, Sync) |
| Housing | ABS |
| Operating Temperature | 0 to 135°F / -17 to 57°C |
| Dimensions | 7.4 x 1.6 x 4.1" / 188 x 40 x 103 mm |
| Weight | 8.5 oz / 241 g |
| Form Factor | Bodypack |
| RF Output Power | 10 mW |
| Audio I/O | 1 x TA4/Mini XLR 4-Pin Male Input (Lockable) |
| Muting | Off/On Switch |
| Auto-Level Control | No |
| Gain Range | -16 to +10 dB |
| Sync Method | Manual |
| Antenna | 1 x Flexible Whip, Fixed (Beltpack) |
| Power Requirements | Battery |
| Battery Type | 2 x AA (Included) |
| Approx. Battery Life | 14 Hours (Alkaline) |
| Display & Indicators | 1 x Multi-Segment LED (Channel, Group) 1 x LED (Battery Status, Power) |
| Housing | ABS |
| Dimensions | 2.5 x 4.3 x 0.8" / 64 x 110 x 21 mm |
| Weight | 2.6 oz / 75 g (without Batteries) |
| Form Factor | Headset |
| Sound Field | Mono |
| Capsule | Electret Condenser |
| Polar Pattern | Cardioid |
| Frequency Range | 45 Hz to 20 kHz |
| SNR | 66 dB |
| Maximum SPL | 145 dB SPL |
| Impedance | 600 Ohms |
| Dynamic Range | 117 dB |
| Output Connectors | 1 x TA4/Mini XLR 4-Pin Female (Lockable) |
| Cable Length | 3.61' / 1.1 m |
| Operating Voltage | 5 V |
| Weight | 2.12 oz / 60 g |
| Package Weight | 2.83 lb |
| Box Dimensions (LxWxH) | 13.55 x 11.75 x 4.15" |
Shipping
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Return within 30 days of delivery. Opened items may carry an open-box fee of up to 30%, set by our QA team on inspection. Return shipping is paid by the customer.
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Contact usShure warranty
This product is covered by the manufacturer's warranty. We help you with the claim from start to finish.
Warranty detailsSupport from real people
Setup questions, compatibility, firmware: chat with a specialist or email info@silarius.com, Monday to Friday, 8am to 4pm ET.
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