Shure BLX14R / SM31 - digital wireless headset microphone set with bodypack transmitter and rack-mounted wireless receiver. It consists of the BLX1 bodypack transmitter, the BLX4R receiver, and the SM31 FH headset microphone.
SM31FH cardioid condenser microphone
It is designed to be used in situations where mobility is necessary, and the user's hands must be free while still requiring high-quality sound. It features a moisture-resistant construction for real performance in humid applications, being resistant to damage from corrosion. It combines automatic frequency management with true digital diversity for a rock-solid wireless signal with exceptional clarity of digital sound.
Main features of the SM31 FH headset microphone:
- Comfortable, secure, and stable wireframe headset
- Hydrophobic fabric, moisture-resistant, protecting the microphone element against harmful corrosion for use in wet environments
- Flexible gooseneck arm providing discreet adjustment options to optimise placement for maximum isolation
- Lightweight and low-profile, allowing for long-term use without causing fatigue
- Compatible with Shure wireless bodypack systems
- Included windshield eliminates plosive sounds, breath noise, or wind noise for clean and intelligible sound
- Custom frequency response, specifically chosen for clear and high-quality vocal reproduction
Technical specifications of the Shure SM31 FH headset microphone:
- Weight: 60 g
- Frequency response: 45 Hz - 20 kHz
- Sensitivity: -50.00 dBV / Pa - 3.16 mV / Pa
- Equivalent self-noise: 28 dB
- Sound pressure level: 145.0 dB
- Type: condenser
- Polar pattern: Cardioid
- Connector: TQG (T4AF, 4-Pin Mini)
- Attenuator: No
- Requires Phantom Power: 5 V DC (nominal), 10 V maximum (DC bias) VDC
- Cartridge: fixed
Shure BLX1 wireless transmitter:
The BLX1 bodypack wireless transmitter features a lightweight and durable design, offers gain control, up to 14 hours of continuous use using 2 AA batteries (included), and a transmission range of 100 m.
Technical specifications of the Shure BLX1 wireless transmitter:
- Weight: 75 g
- Dimensions: 110 × 64 × 21 mm
- Alkaline battery life: 14 hours
- Type: Bodypack
- Transmission range (up to): 100 m (Under typical conditions)
- Housing: ABS
- Audio mute: No
- Detachable antennas: No
- RF switchable power: No
- Batteries: AA
- Battery status indicator: Multi-colour LED
- Connectors: TQG
- Gain adjustment range: 26 dB
- Included antenna: 1/4 wave
- Input impedance: 1000 kΩ
Shure BLX4R wireless receiver:
Analog wireless receiver with rack mount, featuring improved linearity and frequency response, and channel and group scan for quick and easy setup. Features include QuickScan frequency scanning, adjustable output levels, and two-colour LED audio status indicators.
Key features of the Shure BLX4R wireless receiver:
- QuickScan frequency selection, quickly identifying the best open frequency (in case of interference)
- Up to 12 compatible systems on the frequency band (depending on region)
- XLR and 1/4" jack output connectors
- Audio status LED indicator:
- Green: Normal audio levels
- Red: Excessive audio levels (overload/clipping)
- Adjustable output level
- Detachable antennas for quick antenna distribution
- Multi-functional LCD display with detailed radio and audio frequency measurement
- Rack mount kit included
Technical specifications of the Shure BLX4R wireless receiver:
- Weight: 998 g
- Dimensions: 45.0 × 198.0 × 163.0 mm
- Transmission: analog
- Power type: external
- Housing: matte ABS, metal
- Active antenna capability: optional with UABiasT
- BNC bias: No
- High-density mode: No
- Interference detection: No
- Remote control: No
- Number of compatible systems: 12
- DANTE products: No
- Scanning functions: Quick scan
- Detachable antennas: Yes
- Display: Multi-functional LCD
- Included antenna: External 1/4-wave
- Battery status indicator: Multi-colour LED
- Line/mic switch: No
- Image rejection: 50 dB, typical
- RF sensitivity: -105 dBm, for SINAD of 12dB, typical
- Phantom Power protection: No
- Antenna input impedance: 50 Ω
The set includes:
- Rack mount kit
- 2X antenna/BNC, 1/4 WAVE
- 2X BULKHEAD adapter, BNC
- Vinyl protective and transport case with zipper
- 2X BNC cables
- Power supply
