The KSM44/SL is a multiple pattern (cardioid, omnidirectional, bidirectional), externally biased, dual large diaphragm condenser microphone with extremely low self-noise (7dB). Developed to meet the needs of studio recording musicians, the warm, rich sound of the KSM44 delivers exceptional performance, tailored to deliver vivid reproduction of voice for the most critical recordings.

The KSM44 also offers great flexibility in a variety of recording applications, working well on acoustic and amplified instruments, as its capacity for managing high SPLs accommodates loud sound sources such as drums and guitar amplifiers.

Features:

• Dual 1 in., externally biased, ultra-thin, 2.5 micron, 24-karat gold-layered, low mass, Mylar diaphragms provide superior transient response
• Class A, discrete, transformerless preamplifier for transparency, extremely fast transient response and no crossover distortion. Minimizes harmonic and intermodulation distortions.
• Full-range frequency response (20 Hz - 20 KHz) for an extremely accurate reproduction of voice and instruments.
• Extremely low self noise (7 dBA) for critical studio vocal recording.
• Premium electronic components and gold-plated internal and external connectors.
• Subsonic filter eliminates rumble from mechanical vibration below 17 Hz.
• 15 dB attenuation switch for handling high input SPL sound sources.
• 3-position switchable low-frequency filter virtually eliminates unwanted background noise and controls proximity effect.
• Durable zinc die-cast housing and hardened low carbon steel grille to protect the cartridge from accidental drops or misuse.
• Uniform polar response provides natural off-axis response for critical recording.
• An integrated 3-stage pop protection grille to guard against wind and breath noise.
• An internal shock mount to reduce unwanted handling and stand noise.

Performance Characteristics
Extended frequency response
Very low self-noise
Exceptional low-frequency reproduction
High output level
High input SPL capability
No cross-over distortion
Extremely uniform polar response
Superior common mode rejection and suppression of radio frequency interference

Accessories
Each KSM44/SL comes supplied complete with:
Color-matched ShureLock™ elastic-suspension shock mount
ShureLock™ swivel mount
Protective velveteen pouch
Locking aluminum carrying case

Applications
The KSM44/SL is designed as a premium vocal microphone for studio recording. Microphone use, however, is a matter of personal taste. Here is a non-exhaustive list of common applications:
Vocals: solo, background, voice-over
Acoustic instruments : such as piano, guitar, drums, percussion, strings
Wind instruments: brass and woodwind
Low frequency instruments: such as double bass, electric bass, kick drum
Overhead miking: drums or percussion
Ensembles: choral or orchestral
Room ambiance pick-up: guitar amplifier or drums
Of course, both the acoustic environment and microphone placement have significant effects on the sound obtained when miking any sound source. We encourage users to experiment with these variables to achieve the best overall sound.

Technical Info

Cartridge Type: Externally biased condenser
Frequency Response: 20 to 20,000 Hz
Output Impedance: 150 ohms (actual)
Attenuation Switch: 0 or 15 dB attenuation
Low Frequency Response Switch: Flat; -6 dB/octave below 115 Hz; -18 dB/octave below 80 Hz
Phantom Power: 48 Vdc +/- 4 Vdc (IEC-268-15/DIN 45 596), positive pins 2 and 3
Current Drain: 5.4 mA typical at 48 Vdc
Common Mode Rejection: >/= 50dB, 20 Hz to 20 kHz
Polarity: Positive pressure on front diaphragm produces positive voltage on output pin 2 relative to pin 3
Dimensions and Weight: 55.9 mm (2.20 in.) maximum body diameter, 187 mm (7.37 in.) long; 490.5 g (17.30 oz.)
Directional Polar Patterns: Cardioid/Omnidirectional/Bidirectional
Sensitivity (typical; at 1000 Hz; 1 Pa =94dBSPL): --31 dBV/Pa / --37 dBV/Pa / --36 dBV/Pa
Self-noise (typical, equivalent SPL; A-weighted (IEC 651)): 7 dB/10 dB/10 dB
Maximum SPL* 2500 ohms load (Attenuator on): 132 (149) dB/138 (151) dB/137 (150) dB
1000 ohms load: 127 (144) dB/132 (145) dB/131 (144) dB

Output Clipping Level*
2500 ohms load: 7 dBV/7 dBV/7 dBV
1000 ohms load: 1 dBV/1 dBV/1 dBV

Dynamic Range
2500 ohms load: 125 dB/128 dB/127 dB
1000 ohms load: 120 dB/122 dB/121 dB

Signal to Noise ratio: 87 dB/84 dB/84 dB