Shure SM137
Instrument Microphone
The Shure® SM137 is a versatile, flat-response cardioid probe microphone with an ultra-thin diaphragm. Its frequency response combines smooth high-end and tight, controlled low-end. A 15 dB pad provides natural, consistent sound reproduction in both acoustic and high-volume performance applications.
Features
- Cardioid polar pattern to reduce the pickup of unwanted sounds
- Ultra-thin, 2.5 μm 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
- Two-position switchable pad (0 dB and 15 dB) for handling extremely high sound pressure levels (SPLs)
Performance Characteristics
- Extremely uniform polar response
- Extended frequency response
- Minimal self-noise
- Exceptional low-frequency reproduction
- Able to withstand high SPLs
- High output level
- No crossover distortion
- Superior common-mode rejection and suppression of radio frequency interference (RFI)
Applications
- Brass and woodwind instruments
- Orchestras, choirs, and wind ensembles
- Overhead miking of drums and percussion instruments
- Close-miking of acoustic instruments such as piano, guitar, violins, drums, and percussion
- Low-frequency instruments such as double bass and kick drum
- Electric guitar and bass amplifiers
- Vocals and speech
- Room ambience
Note: Sound quality is strongly affected by microphone location and room acoustics. To achieve the best overall sound for a particular application, it may be necessary to experiment with microphone placement and room treatments.
Mounting the Microphone
Use the supplied microphone mount with floor or boom stands. Visit www.shure.com for more mounting options:
- To reduce the pickup of unwanted low-frequency mechanical vibrations, use an isolating shock mount.
- For stereo applications, use the optional Shure A27M Stereo Microphone Adapter.
Setting Attenuation
The attenuation switch lets you reduce the signal level without altering the frequency response. This can prevent extremely loud sounds from overloading the microphone.
0 dB |
For “quiet” to “normal” sound levels. |
-15 dB |
For use with extremely loud sound sources such as drums, horns, or loud guitar cabinets. |
Integral Pop Filter
The microphone grille consists of 3 separate mesh layers that act as an integral pop filter. This helps reduce wind and breath noise. Depending on the performer, an external pop-protection screen or windscreen may be necessary when close-miking vocalists.
Load Impedance
Maximum SPL capability, output clipping level, and dynamic range vary with the input load impedance of the preamplifier to which you connect the microphone. Shure recommends a minimum input load impedance of 1000 Ω. Most modern microphone preamplifiers meet this requirement. Higher impedance results in better performance for these specifications.
Power Requirements
This microphone requires phantom power and performs best with a 48 Vdc supply (IEC-61938). However, it will operate with slightly decreased headroom and sensitivity with supplies as low as 11 Vdc.
Most modern mixers provide phantom power. You must use a balanced microphone cable: XLR-to-XLR or XLR-to-TRS.
Specifications
Type
Electret Condenser
Frequency Response
20 to 20,000 Hz
Polar Pattern
Cardioid
Output Impedance
150 Ω (actual)
Sensitivity
(at 1 kHz, open circuit voltage): -41 dBV/Pa[1]
Maximum SPL
(1 kHz at 1% THD)
1000 Ω load: 139 dB (154 dB, PAD ON)
2500 Ω load: 144 dB (159 dB, PAD ON)
Signal-To-Noise Ratio
(Ref. 94 dB SPL at 1 kHz): 75 dB[2]
Dynamic Range
(at 1 kHz)
1000 Ω load: 120 dB
2500 Ω load: 125 dB
Common Mode Rejection
(10 Hz to 100 kHz): >50 dB
Clipping Level
(20 Hz to 20 kHz, at 1% THD[3])
1000 Ω load: 3 dBV
2500 Ω load: 9 dBV
Self Noise
(typical, equivalent SPL, A-weighted): 19 dB
Attenuator Switch
-15 dB
Polarity
Positive pressure on diaphragm produces positive voltage on pin 2 with respect to pin 3
Net Weight
195 g (6.9oz.)
Connector
Three-pin professional audio (XLR), male
Power Requirements
48 V DC phantom power, 5.2 mA
[1] 1 Pa=94 dB SPL
[2] S/N ratio is difference between 94 dB SPL and equivalent SPL of self noise, A-weighted
[3] THD of microphone preamplifier when applied input signal is equivalent to cartridge output at specified SPL.
Overall Dimensions
Typical Frequency Response
Typical Polar Patterns
Accessories
Storage Case
Windscreen
Microphone Clip
Furnished Accessories
Storage Bag |
95C2313 |
Black Foam Windscreen for PGA81, SM94 and SM137 |
A3WS |
Microphone Clip for SM58, SM57, SM87A, Beta 87A, Beta 87C, PGA57, PGA58, PGA48, PGA81 |
A25D |
Optional Accessories
Shock Stopper® Isolation Mount |
A55M |
Shock Stopper Isolation Mount |
A55HM |
Popper Stopper® Pop Filter with Metal Gooseneck and Microphone Stand Clamp |
PS-6 |
Certifications
This product meets the Essential Requirements of all relevant European directives and is eligible for CE marking.
The CE Declaration of Conformity can be obtained from: www.shure.com/europe/compliance
Authorized European representative:
Shure Europe GmbH
Headquarters Europe, Middle East & Africa
Department: EMEA Approval
Jakob-Dieffenbacher-Str. 12
75031 Eppingen, Germany
Phone: 49-7262-92 49 0
Fax: 49-7262-92 49 11 4
Email: info@shure.de
Titel | Type | Størrelse | Download |
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SM137_specsheets_en-US.pdf | 2.30MB | Download |