Shure SM39-LM3
Headset Condenser Microphone
- Suitable for noisy environments due to over 20 dB off-axis attenuation
- Polar pattern: Cardioid
- Frequency range: 70 - 20.000 Hz
- Sensitivity: -40.3 dBV/Pa
- Max. sound pressure level: 134.1 dB SPL
- Signal-to-noise ratio: 71.9 dB
- Dynamic range: 112 dB
- Ergonomic design and adjustable, flexible headband ensure comfortable and secure fit
- Hydrophobic coating
- Connection: LEMO
- Cable length: 150 cm
- Weight: 54 g
- Colour: Black
- Includes outdoor windscreen, indoor windscreen and collar clip
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Available since January 2025
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Item number 609822
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Sales Unit 1 piece(s)
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Capsule type Condenser
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Pattern cardioid
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Connector 3-pol. Lemo
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Colour Black
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Removable Phantom Adaptor No
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Sport Yes
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Cable Length 150 cm
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Weight 54 g
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Frequency range from 70 Hz
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Frequency range to 20 kHz
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Vocal Yes
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incl. Windscreen Yes
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incl. Bag Yes
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Headset mic for performing artists
The Shure SM39-LM3 is a cardioid condenser headset microphone engineered for performers who need freedom of movement without compromising on sound quality. Its low-profile, ergonomic frame contours the head and jawline, sitting securely and comfortably even through energetic dance routines and other high-intensity stage and vocal performances. The flexible boom arm allows the capsule to be precisely positioned and firmly locked into place, maintaining a consistent capsule-to-mouth distance regardless of how a performer moves. Compatible with Axient Digital and Shure wireless systems via LEMO connectors, the SM39-LM3 keeps the setup free both of cables and of interference.
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Let's get loud
The SM39-LM3's 70Hz–20kHz frequency response is tuned for vocal clarity, with a 134.1dB max SPL and 112dB dynamic range handling everything from a whispered aside to a belted high note on the same track – without noise floor intrusion or clipping. Its 71.9dB signal-to-noise ratio keeps the transmitted signal clean even when the performer is surrounded by loud stage monitoring, brass sections, or crowd noise, while the cardioid pattern attenuates ambient bleed from the sides and rear. A hydrophobic coating protects the capsule against sweat, saliva, and moisture – the inevitable companions of high-energy live performance. The 1.5m cable terminates in a LEMO connector for compatible Shure bodypack transmitters, and at just 54.4g the headset sits unnoticed through a full show.
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Works wirelessly, wherever
The Shure SM39-LM3 is designed for leading and backing vocalists, instrumentalists, and dancers performing in professional live and broadcast contexts – artists who need a headset that disappears into the rig and holds up across demanding shows and sessions. The adjustable headband accommodates a wide range of head sizes, while Axient Digital compatibility holds the RF link clean even on busy stages at a festival or large venue. Whether singing an operatic aria outdoors, doubling the vocal line while riding a bass slung too low, or landing a jump split at the end of the main chorus, the SM39-LM3 stays put and stays clear. Both indoor and outdoor windscreens ship alongside the collar clip – ready for stage, broadcast, or location work out of the box.
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About Shure
The American company Shure began developing microphones during the early 1930s and is one of the pioneers of the audio engineering sector. Models such as the 55 Unidyne – known to many as the "Elvis microphone" – and the SM57 and SM58 which appeared in the mid-1960s are still ubiquitous in live sound production today. They enjoy cult status among musicians and technicians alike. In the 1990s, Shure introduced the first wireless microphones and in-ear monitoring systems and became a market leader in this field. In addition to microphones, Shure offers a wide range of earphones and headphones for studio and live use, as well as various accessories.
Pro-grade off-axial attenuation
The SM39-LM3's cardioid polar pattern is ideally suited to headset use: Positioned directly in front of the mouth, it captures the voice clearly and consistently, while rejecting sources arriving from the sides and rear – stage monitoring, nearby instruments, crowd noise. Unlike a supercardioid, which introduces a rear lobe that picks up sources directly opposite the capsule – including monitor bleed – the cardioid pattern offers clean, predictable rejection across the full rear hemisphere, while consistently attenuating side sources that would otherwise colour the signal. With more than 20dB of measured off-axis attenuation, the SM39-LM3's high feedback threshold lets engineers push the vocals hard before the system starts to ring.