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Shure KSM44A/SL Large Diaphragm Multi-Pattern Condenser Microphone
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.
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 |
Sensitivity ( open circuitvoltage, @ 1 kHz, typical) | |
Cardioid | –31 dBV /Pa (29. 8 mV) |
Omnidirectional | –37 dBV /Pa (14. 8 mV ) |
Bidirectional | –36 dBV /Pa (16. 8 mV) |
Self Noise (equivalent SPL,A - weighted , typical) | |
Cardioid | 4 dB SPL -A |
Omnidirectional | 6 dB SPL -A |
Bidirectional | 7.5 dB SPL -A |
Preamplifier Distortion (at 1 kHz, 94 dB SPL) | <0.00 1% |
Signal-to-Noise Ratio | |
Cardioid | 90 db |
Omnidirectional | 88 dB |
Bidirectional | 86.5 dB |
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