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Product Specifications BRH31M Broadcast Headset Overview Designed to meet the needs of broadcast and media production professionals, the BRH31M Broadcast Headset provides exceptional audio quality, comfort and legendary Shure durability in an ultra-lightweight design. User-replaceable accessories ensure a long lifetime of use. Features • Closed-back, supra-aural design with ultra-lightweight construction • Dynamic microphone delivers natural, highly intelligible vocal reproduction with cardioid polar pattern and frequency response optimized for communication in loud environments • Adjustable headband with cushioned temple pad for comfortable, ergonomic fit • Flexible boom microphone pivots 270 degrees for left or right side wear and precise positioning • Single-sided, fixed cable with unterminated ends (bare whip) enables connection to a variety of devices. Kevlar® reinforced for increased durability. • Legendary Shure durability designed under rigorous quality standards to withstand the demands of everyday, professional use • User-replaceable ear pad and windscreen provided for a long product life Available Models BRH31M Single-Sided Lightweight Broadcast Headset. Specifications Net Weight (without cable) Cable Microphone Type Polar Pattern Frequency Response Output Impedance Sensitivity (@ 1 kHz, open circuit voltage) Polarity Headphone Transducer Type Driver Size Frequency Range Sensitivity (@ 1 kHz) Impedance (@ 1 kHz) Maximum Input Power 81 g (2.9 oz) Fixed, Single-Sided, 5-conductor, Unterminated cable (1.8 m) Dynamic (moving coil) Cardioid 100 to 12,000 Hz 200 Ohms *1 Pa - 94 dB SPL -64.0 dBV/Pa* (0.45 minimum) Positive pressure on diaphragm produces positive voltage on pin 1 (red wire) with respect to pin 3 (shield) Dynamic, Neodymium magnet 30 mm 150 to 12,000 Hz 101 dB/mW 220 Ohms 200 mW Accessories and Replacement Parts Replacement Ear Pads Replacement Windscreen BCAEC31 BCAWS1 150° 20 180° 150° 150° 180° 150° 15 10 120° 120° 120° 120° dB 5 0 -5 90° 90° -10 90° 90° -30 dB -15 -20 -30 dB -20 dB 60° 60° -20 dB 60° -10 dB -25 -30 20 100 0.4” from sound source 1k 10k 15k Hz www.shure.com 30° 0 30° 500 Hz Frequency Response ©2012 Shure Incorporated 0 30° 2000 Hz 1000 Hz 1.2” from sound source 6’ from sound source 30° 60° -10 dB 4000 Hz Polar Pattern
