Product Highlights
  • 512 - 542 MHz Bandwidth
  • 91 m (300') Frequency Range
  • Headset Microphone
  • Unidirectional Pickup Pattern
  • XLR, 1/4” Connection
  • Wireless
  • BLX Series Compatible
  • Includes Microphone, Transmitter & Receiver
Shure BLX14/P31-H9 Bodypack system with PGA31-TQG cardioid condenser headworn microphone/ ch 21-25 Shure BLX14/P31-H9 Bodypack system w...
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Please call and verify availability at the store as stock changes daily.


Shure BLX14/P31-H9 Bodypack system

The BLX14/P31 Headworn Wireless System is part of the BLX wireless systems family. 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.

PGA31 Performance Headset Condenser Microphone

The PGA31 is an affordable wireless cardioid condenser headset microphone that delivers reliable sound quality for speech and live vocal performance applications.

Designed for long-wearing comfort, the PGA31 offers a secure fit for hands-free operation in any situation. Its unidirectional cardioid polar pattern provides excellent off-axis rejection for higher gain-before-feedback when using a stage monitor.

Available in bundled BLX, GLX-D, and PGX Digital wireless systems, the PGA31 features TA4F 4-pin connectors that make it a viable replacement for any Shure wireless headset system.

Microphone Features:

  • Wireframe headset fits securely for active speakers and vocal performers
  • Permanently charged electret condenser cartridge delivers detailed, crisp vocals
  • Unidirectional cardioid polar pattern rejects unwanted noise for improved sound quality and higher gain-before-feedback
  • Flexible gooseneck design and discrete adjustment capabilities optimize microphone positioning for further source isolation
  • TA4F (TQG) connector seamlessly integrates with Shure wireless bodypacks
  • Included windscreen tames plosives for clean and intelligible sound reproduction
  • Tailored frequency response for great sound on vocals
  • Available with BLX, GLX-D, and PGX Digital wireless systems, renowned for ease-of-use and reliable performance
  • Legendary Shure precision engineering for durability and performance

Shure BLX1 Bodypack Transmitter 

The durable BLX1 features a lightweight, ergonomic design and adjustable gain control. For use with BLX Wireless Systems.

Transmitter Features:

  • Quick and easy receiver frequency matching
  • TQG connection for use with Shure lavalier, headset, earset and instrument microphones and guitar cables
  • Easily accessible On / Off switch

Shure BLX4 Single-Channel Wireless Receiver

The durable BLX4 features simple setup, intuitive controls, and microprocessor-controlled internal antenna diversity. One-touch QuickScan frequency selection quickly locates the best open frequency in case of interference. For use with BLX Wireless Systems.       

Receiver Features:

  • XLR and ¼" output connectors
  • Two-color audio status indicator LED
  • Green:  Normal audio levels
  • Red:  Excessive audio levels (overload / clipping)

What's Included

PGA31 Performance Headset Condenser Microphone
BLX1 Bodypack Transmitter (H9: 512 - 542 MHz)
AA Batteries
BLX4 Single-Channel Wireless Receiver (H9: 512 - 542 MHz)
Power Supply


Product Specifications

BLX14/P31-H9 Bodypack system

Operating Range 300 ft (91 m) line of sight (actual range depends on RF signal absorption, reflection and interference)
Available Frequencies Between 524 – 865 MHz (available frequencies depend on applicable regulations in country where system is used)
Audio Range 50 – 15,000 Hz
(dependent on microphone type)
Total Harmonic Distortion Ref. ±33 kHz deviation with 1 kHz tone
0.5%, typical
Transmitter RF Output Power 10 mW, typical (varies by region)
Audio Output Connector XLR and 1/4" (6.3 mm)
Maximum Output Level -27 dBV (XLR, mic level),
-13 dBV (1/4")
Battery Life Up to 14 hours
Dynamic Range 100 dB A-weighted
System Distortion 0.5% THD typical
(ref. +/- 38 kHz deviation, 1 kHz tone)
Operating Temperature Range -18°C (0°F) – +50°C (122°F)
Polarity 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.
Power Requirements BLX1, BLX2: 2 AA alkaline
or rechargeable batteries

BLX4: 12 – 18 V DC
at 150 mA, supplied by
external power supply


Audio Input Level max -16 dBV maximum
min (0 dB) +10 dBV maximum
Gain Adjustment Range 26 dB
Input Impedance 1 MΩ
RF Transmitter Output 10 mW, typical
Varies by region
Dimensions 4.33 in. X 2.52 in. X 0.83 in. (11 cm X 6.4 cm X 2.1 cm) H x W x D
Weight 2.6  oz. (75 g), without batteries
Housing Molded ABS
Power Requirements 2 LR6 AA batteries, 1.5 V, alkaline
Battery Life Up to 14  hours (Alkaline)


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 1.57 in. X 7.40 in. X 4.06in. (4 cm X 18.8 cm X 10.3 cm) H x W x D
Weight 8.5 oz. (241 g)
Housing Molded ABS
Power Requirements 12–15 V DC @ 160 mA (BLX88, 320 mA), supplied by external power supply (tip positive)


Type Electret Condenser
Frequency Response 60 to 20,000 Hz
Polar Pattern Unidirectional (Cardioid)
Output Impedance
@ 1 kHz, typical
600 Ω
Audio Output Level -50 dBV/Pa
Signal-To-Noise Ratio
@ 1 kHz
66 dB
Maximum SPL
1000 Ω load, @ 3% THD
145.0 dB
Dynamic Range
@ 1 kHz, 1000 Ω load
117.0 dB
Equivalent Output Noise
Typical, A-Weighted
28 dB
Power Requirements +5 V DC (nominal), 10 V maximum (DC bias)
Polarity Positive pressure on diaphragm produces positive voltage on pin 3 with respect to pin 1
Cable 1.3 m (50 in.)
Connector TA4F
Net Weight 45 g (1.59 oz.)

Questions & Answers

Shure BLX14/P31-H9 Bodypack system with PGA31-TQG cardioid condenser headworn microphone/ ch 21-25

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