ไมค์จับเครื่องดนตรี ยี่ห้อ Shure รุ่น KSM137/SL-X

The KSM137 is an end-address condenser microphone with a single cardioid polar pattern. Designed for studio use, yet rugged enough for live applications, the KSM137 can withstand extremely high sound pressure levels (SPL). Its low self-noise and extended frequency response make it ideal for recording instruments.

FEATURES :

• Highly consistent cardioid polar pattern
• Ultra-thin, 2.5 micron, 24 karat gold-layered, low mass Mylar® diaphragm for superior transient response
• Class A, discrete, transformerless preamplifier for transparency, extremely fast transient response, no crossover distortion, and minimal harmonic and intermodulation distortion
• Premium electronic components, including gold-plated internal and external connectors
• Subsonic filter eliminates low frequency rumble (less than 17 Hz) caused by mechanical vibration
• Switchable 15 dB pad for handling extremely high sound pressure levels (SPLs)
• 3-position switchable pad (0 dB, 15 dB, and 25 dB) for handling extremely high sound pressure levels (SPLs)
• 3-position switchable low-frequency filter reduces background noise and counteracts proximity effect

SPECIFICATIONS :

Cartridge Type

• Permanently Biased Condenser

Frequency Response

• 20 to 20,000 Hz

Directional Polar Pattern

• Cardioid

Output Impedance

• 150 ohms (actual)

Attenuation Switch

• 0 dB, 15 dB, or 25 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

• 4.65 mA typical at 48 Vdc

Common Mode Rejection

• >50 dB, 20 Hz to 20 kHz

Polarity

• Positive pressure on diaphragm produces positive voltage on output pin 2 relative to pin 3

Dimensions and Weight

• 20 mm (0.8 in.) diameter, 122 mm (4.8 in.) long
• 100 grams (3.5 oz.) Sensitivity (typical, at 1000 Hz; 1 Pa = 94 dB SPL)
• -37 dBV/Pa

Self-noise (typical, equivalent SPL; A-weighted, IEC 651)

• 14 dB

Maximum SPL at 1 kHz

• 5000 ohm load (Attenuator on): 145 (160, 170) dB
• 2500 ohm load (Attenuator on): 139 (154, 164) dB
• 1000 ohm load (Attenuator on): 134 (149, 159) dB

Output Clipping Level*

• 5000 ohm load: 15 dBV
• 2500 ohm load: 9 dBV
• 1000 ohm load: 3 dBV
• *20 Hz to 20 kHz; THD < 1%. THD of the microphone preamplifier when applied input signal is equivalent to the cartridge output at specified SPL

Dynamic Range

• 5000 ohm load: 131 dB
• 2500 ohm load: 125 dB
• 1000 ohm load: 120 dB

Signal to Noise Ratio**

• 80 dB
• **S/N ratio is difference between 94 dB SPL and equivalent SPL of self noise A-weighted.