Product Details


This premium side-address, cardioid condenser microphone features a large dual-diaphragm capsule, optimized for world-class vocal recording and performance applications. With a tailored frequency response and extensive internal and external pop filtering, the single-pattern, dual-diaphragm design of the KSM42, featuring Prethos® Advanced Preamplifier Technology exhibits an exceptionally smooth proximity control and ultra-wide dynamic range. The KSM42 is the premier choice for capturing sophisticated, powerful and intimate vocal performances.

A milestone achievement in sound reinforcement, Prethos Advanced Preamplifier Technology employs transparent internal circuitry architectures that enable unprecedented audio quality and performance.


  • Highly consistent cardioid polar pattern creates a broad “sweet spot” and natural off-axis response
  • Prethos® Advanced Preamplifier Technology exhibits extremely low self-noise with superior dynamic range, transient response and ultra-low distortion for transparent recording
  • Dual-diaphragm design with an active front, ultra thin (2.5 micron) 24-karat gold, low mass, 1-inch Mylar® diaphragm
  • Passive back diaphragm delivers exceptional control of low frequency proximity effect
  • Tailored low-frequency roll-off minimizes low frequency room noise
  • Integrated three-stage mesh grille guards against wind and breath noise
  • Open cage ShureLock® rubber suspension shock mount with low-profile Popper Stopper™ magnetic pop filter produces a natural space between performer and microphone
  • Extremely low self noise for critical studio vocal recording
  • Premium electronic components and gold-plated internal and external connectors
  • Durable zinc die-cast housing and hardened low carbon steel grille
  • Internal shock mount to reduce unwanted handling and stand noise
Microphone Type
Polar Pattern
Frequency Response
Form Factor
Model Line
Type Dual-Diaphragm, Front-Active, Externally Biased Condenser
Frequency Response 60 to 20,000Hz
Polar Pattern Cardioid
lmpedance 147 Ω
Phantom power required? 11 to 52 Vdc phantom, 6 mA

Additional specifications are available in the user guide.



    Set of 4 Suspension Mount O-Rings for use with KSM42.

    from $10

    A42PF PopperStopper™ Magnetic Pop Filter

    PopperStopper™ Magnetic Pop Filter attenuates unwanted breath noise and plosives. Works with KSM42.

    from $53


    ShureLock® Rubber Suspension Shock Mount. Works with KSM42.

    from $142


    Protective Velveteen Pouch. Works with KSM42.

    from $13


    Zippered carrying case for KSM42.

    from $69

Product Reviews

KSM42 Reviews

Read what people think about the KSM42.

It’s refreshing to see a company... Read full text on the Everything Audio Network blog

The KSM line represents Shure’s premium... Read full text on Tape Op

Software & Downloads


File Language Type File Size
Broadcast & Media Production Brochure English PDF 4.77 mb
KSM Microphone Product Brochure English PDF 1.91 mb

Specification Sheets

File Language Type File Size
KSM42 Specification Sheet English PDF 401 kb

User Guides

File Language Type File Size
KSM42 User Guide

Product Support

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