Shure KSM44A Multi-Pattern Dual-Diaphragm Microphone

Article number: KSM44A/SL
Availability: Ships from manufacturer
Delivery time: Normal delivery time is 2-7 business days, subject to availability.

The KSM44A is a premium, large-diaphragm, side-address condenser microphone with multiple polar pattern options (cardioid, omnidirectional, bidirectional). The refined and sophisticated design of the KSM44A features an externally biased, dual 1-inch diaphragms, extensive internal pop filtering and Prethos® Advanced Preamplifier Technology for a ground-breaking threshold minimum of self-noise. The KSM44A is the premier choice for the highest level of professional studio and stage performance. A milestone achievement in sound reinforcement, Prethos Advanced Preamplifier Technology employs transparent internal circuitry architectures that enable unprecedented audio quality and performance.


  • Prethos® Advanced Preamplifier Technology: Class A, discrete, transformerless preamplifier provides transparency, extremely fast transient response and no crossover distortion. Minimizes harmonic and intermodulation distortions.
  • Groundbreaking specifications: 4dB of self-noise and max SPL of 131 dB for a total dynamic range of 127 dB – an increase of 7 dB that defines the new standard for cleanly nuanced audio capture
  • Multiple polar patterns–cardioid, omnidirectional and bidirectional–for maximum flexibility in a wide variety of recording applications
  • Dual 1 inch, externally biased, ultra-thin, 2.5 μm, 24 Karat gold-layered, low mass diaphragms provide superior frequency response
  • Premium electronic components and gold-plated internal and external connectors
  • Subsonic filter eliminates rumble from mechanical vibration below 17 Hz.
  • Switchable 15 dB pad for handling extremely high sound pressure levels (SPLs)
  • 3-position switchable low-frequency filter helps reduce unwanted stand vibration noise or counteract proximity effect
  • Integrated three-stage “pop” protection grille reduces plosives and other breath noise
  • Includes ShureLock® Stand Mount, Aluminium Carrying Case, ShureLock® Elastic Shock Mount, Suspension Shock Mount Elastic Cord Cristal (contains two), Protective Velveteen Pouch


  • Cartridge Type: Condenser (externally biased)
  • Polar Pattern: Cardioid, Omnidirectional, Bidirectional
  • Frequency Response: 20 to 20,000 Hz
  • Sensitivity (open circuitvoltage, @ 1 kHz, typical): -31 to -37 dBV/Pa
  • Self Noise (equivalent SPL, Aweighted, typical): 4 to 7.5 dB SPL
  • Preamplifier Distortion (at1 kHz, 94 dB SPL): <0.001%
  • Signal-to-Noise Ratio: 86.5 to 90 dB
  • Clipping Level (20 Hz to 20 kHz, 1% THD): 2500 Ω load = 9 dBV, 1000 Ω load = 6 dBV
  • Dynamic Range (@ 1kHz): 2500 Ω load = 130 to 134 dB, 1000 Ω load = 127 to 131 dB
  • Maximum SPL (1 kHz at 1% THD - PAD OFF): 131 to 140 dB SPL
  • Maximum SPL (1 kHz at 1% THD - PAD ON): 147 to 152 dB SPL
  • Output Impedance: 50 ohms
  • Attenuator Switch: 15 dB
  • Low-Frequency Filter Switch: Flat, –6 dB/octave below 115 Hz, or –18 dB/octave below 80 H
  • Power Requirements: 11–52 V DC phantom power (IEC-61938) 5.8 mA, maximum
  • Common Mode Rejection (10 to 100,000 Hz): > 50 dB
  • Common Mode Rejection (20 Hz to 20 kHz): > 50 dB
  • Polarity: Positive pressure on diaphragm produces positive voltage on pin 2 with respect to pin 3
  • Net Weight: 492 g (17.4 oz.)
  • Connector: Three-pin professional audio (XLR). male, balanced
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