SHURE SM137 – Instrument Microphone

The SM137 is a versatile, flat-response cardioid condenser probe microphone.

The SM137 has an ultra-thin diaphragm for a frequency response that combines a smooth high-end with a tight, controlled low-end and a 15db pad for natural sound reproduction in both acoustic and high volume performance applications.



    Ultra-thin diaphragm for smooth high end and tight, controlled low end
    
    15dB pad for performance consistency across a wider range of high SPL sources
    
    Low self-noise and transformerless preamplifier circuitry


 

Cartridge Type
    Permanently Biased Condenser
Frequency Response
    20 to 20,000 Hz
    Response Curve Image Small SM137 View Larger
Directional Polar Pattern
    Cardioid
Output Impedance
    150 ohms (actual)
Attenuation Switch
0 dB or 15 dB attenuation
Phantom Power
    48 Vdc +/- 4 Vdc
    (IEC-268-15/DIN 45 596), positive pins 2 and 3
Current Drain
    5.2 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
    24 mm (0.950 in.) diameter
    162 mm (6.375 in.) long
    195 grams (6.9 oz.)

OVERVIEW

Cardioid dynamic kick drum mic with swivel mount and cable.

The PGA52 is a professional quality kick drum microphone with an updated industrial design that features a black metallic finish and grille offering an unobtrusive visual presence. Legendary Shure quality construction ensures exceptional performance in rigorous environments.

Additional design highlights include a swivel joint featuring a quick-release latch similar to bicycle component-locking technology for extremely quick and easy positioning.

• Mountable microphone featuring swivel joint with quick-release latch for kick drum
• Dynamic cartridge (does not require phantom power) with cardioid polar pattern
• Tailored cartridge design for low-frequency clarity, including on bass amps
• Includes PGA52, zipper pouch and user guide
• XLR to XLR mic cable included

Audio Frequency Response    20 Hz - 10,000 Hz
Case Material    Die cast zinc
Connector Type    3-pin XLR
Element    Dynamic
Finish    Textured Satin Black
Impedance, Low-Z balanced    150 Ω
Mic Type    Instrumental
Open Circuit Voltage    0.63 mV/Pascal
Polar Pattern    Supercardioid
Power Requirement    Passive
Shipping Weight    23.7 oz (672 g)
Wired/Wireless    Wired
Weight Net    12.84 oz (364 g)

• Tailored frequency response provides drums, guitars, vocals, and horns with studio quality sound
• Uniform supercardioid pattern for high gain-before-feedback and superior rejection of off-axis sound
• Hardened steel mesh grille that facilitates use of proximity effect and resists wear and abuse
• Neodymium magnet for high signal-to-noise ratio output
• Advanced pneumatic shock mount system that minimizes transmission of mechanical noise and vibration
• Frequency response: 50 to 16,000 Hz

Complete With Stereo Bar, Windshield's and Cradle'

The C 414 B-XL II/ST is especially useful for stereo recordings taken from the far field with the inclusion of useful and often valuable room acoustics. The matched pairs consist of two microphones that are within 1 dB to each other in sensitivity and also within 1 dB to each other in the range of 300 Hz to 8,000 Hz of the individual frequency response when used in cardioid mode and are selected from a large quantity of individual microphones using the described criteria by using a proprietary computer program.

Using this matched pair for stereo recordings utilizing various techniques will provide for a good and stable balance without frequency-dependent shifting of the stereo panorama.

The kit comes complete in an all-metal 'Soundtool' Hard Shell road case with 2 x AKG H-85 shock mounts, 2 x W414X external windscreens, an H50 stereo bar and an individually-measured chart showing the response curve of the microphone. See www.dv247.com Alternative Products and Related Products on this page for your options.

The C 414B-XLII has been carefully designed to maintain the legendary sonic character of the C 414 family while integrating new features and performance enhancements made possible by new technology. A classic microphone with a distinctive timbre especially designed for recording of solo vocals and solo instruments.

Whats the difference between the C 414B-XLII and the C 414 B XLS? The main difference between the two current C414 models lies in their frequency responses. The C 414B-XLII has a series of presence rises between 2.5 KHz and 9 KHz. This will make any recording with this microphone brighter or more sibilant than the original sound. This upper mid range boost is quite helpful on vocals and certain instruments such as classical acoustic guitars using nylon or natural strings. The C 414B XLS, see www.dv247.com Alternative Products on this page, has a very flat response that will not color the original sound which is important especially in instrumental recordings. It more suited for general use.

The microphone's 5 pickup patterns are easily selectable via an electronic switch with LED indication and offer the selection of omnidirectional, cardioid wide cardioid, hyper cardioid and figure-eight patterns. The pickup pattern selector switch utilizes a dual-color LED indicator that provides visual indication of the pattern selected and also changes from green to red to indicate if the microphone's output electronics are being overloaded. The pattern selector can also be used to "lock" the microphone's switch settings by pressing and holding it for 3 seconds. On the rear of the microphone, an electronic switch allows the selection of -6, -12 and -18 dB pre-attenuation levels which are accomplished by changing the polarization voltage to the capsule. The C 414B-XLII has switchable bass cut filters of 12 dB-per-octave at 40 Hz and 80 Hz, and a 6 dB-per-octave filter at 160 Hz for control of proximity effect. On-axis sensitivity for all patterns is 23 mV/Pa and its self-noise is an extremely low 6 dB-A.

The C 414B-XLII has a transformerless output and all-metal chassis, making it immune to electrical interference and RF from digital equipment, video monitors and wireless systems.

Features:

• High sensitivity and extremely low self noise
• Five switchable polar patterns for placement and application flexibility
• Two-color LEDs provide quick visual indication of selected polar pattern and output overload
• Elastic capsule suspension greatly minimizes structurally-transmitted noise from chassis vibration
• Supplied with Hard Shell road case with 2 x AKG H-85 shock mounts, 2 x W414X external windscreens and an H50 stereo bar
• High sound pressure level capability, 140 - 158dB, and wide dynamic range
• Completely immune to electrostatic and electro-magnetic interference from digital gear, computer monitors, etc. thanks to solid metal housing and transformerless output stage
• Three switchable bass cut filters and three pre-attenuation pads with LEDs for quick visual indication
• All switchable components operate in low impedance circuits for ultra-high relability even in extremely humid conditions

Specifications:

• Type: 1" large diaphragm pressure gradient microphone
• Polar Patterns: Omnidirectional, wide cardioid, cardioid, hypercardioid, figure eight
• Frequency Range: 20 to 20,000 Hz
• Sensitivity: 23 mV/Pa (-33 dBV) +/-0.5 dB
• Max. SPL: 140/146/152/158 dB SPL (at 0/-6/-12/-18 dB)
• Preattenuation Pad: -6, -12,-18 dB, switchable
• Bass Cut Filter Scope: 12 dB/octave at 40 Hz and 80 Hz; 6 dB/octave at 160 Hz
• Impedance: = 2,200 ohms
• Supply voltage: 48 V phantom power to DIN/IEC
• Current consumption: Approximately 4.5 mA
• Dynamic range: 134 dB minimum
• Environment Temperature range: -10° C to +60° C (14° F to 140° F)
• Relative humidity: 95% (+20° C/68° F), 85% (+60° C/140° F)
• Connector: 3-pin XLR to IEC
• Dimensions: 50 x 38 x 160 mm (2.0 x 1.5 x 6.3 in.)
• Net weight 300 g (10.6 oz.)