Shure KSM44A/SL Microphone

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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.

FEATURES

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

SPECIFICATIONS

Cartridge Type: Condenser (externally biased)
Polar Pattern: Cardioid, Omnidirectional, Bidirectional
Frequency Response: 20 to 20,000 Hz
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
Sensitiv ity ( open circuitvoltage, @ 1 kHz, typ i:
Cardioid: –31 dBV /Pa (29. 8 mV)
Omnidirectional: –37 dBV /Pa (14. 8 mV )
Bidirectional: –36 dBV /Pa (16. 8 mV)
Self Noise (eq uivalent SPL,A - weighted , typical:
Cardioid: 4 dB SPL -A
Omnidirectional: 6 dB SPL -A
Bidirectional: 7.5 dB SPL -A
Preamplifier Dist orti on (at 1 kHz, 94 dB SPL): <0.00 1%
Signal-to -Noise Ratio
Cardioid: 90 db
Omnidirectional: 88 dB
Bidirectional: 86.5 dB

CONTENTS

(1) Shure KSM44A/SL Multi-Pattern Dual Diaphragm Microphone
(1) Shockmount Stand Adapter
(1) Aluminum Carrying and Storage Case
(1) Operator's Instructions