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Large Dual-Diaphragm Vocal Microphone

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The Shure KSM Microphone Series KSM 42 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 KSM-42, 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
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
Prethos Advanced Preamplifier Technology exhibits extremely low self-noise with superior dynamic range, transient response and ultra-low distortion for transparent 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
Transducer Type Dual-Diaphragm, Front-Active, Externally Biased Condenser
Frequency Response 60 to 20,000 Hz
Polar Pattern Cardioid
Output Impedance 147 ohms
Sensitivity (at 1 kHz, open circuit voltage) -37 dBV/Pa (14.1 mV); 1 Pascal=94 dB SPL
Maximum SPL (1 kHz at 1% THD) 1000 ohms load= 139 dB; 2500 ohms load= 139 dB
Signal-to-Noise Ratio (referenced at 94 dB SPL at 1 kHz) 86 dB; S/N ratio is difference between 94 dB SPL and equivalent SPL of self noise, A-weighted
Dynamic Range (at 1 kHz) 1000 ohms load= 131 dB; 2500 ohms load= 131 dB
Common Mode Rejection (10 Hz to 100 kHz) > 60 dB
Clipping Level (20Hz-20 kHz at 1% THD) 1000 ohms load= 6.5 dBV; 2500 ohms load=8 dBV
Self Noise (typical, equivalent SPL, A-weighted) 8.5 dB
Polarity Positive pressure on diaphragm produces positive voltage on pin 2 with respect to pin 3
Weight Net 494 g. with shock mount and pop filter: 820 g
Connector Three-pin professional audio (XLR), male
Power Requirements 11 to 52 Vdc phantom, 6 mA



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Prices and specifications subject to change without notice.