The Shure® Beta 27 is a studio-grade, side-address condenser microphone for professional sound reinforcement. Its flat frequency response, low self noise, and superior construction quality provide unerring precision in demanding performance and recording environments. A tight supercardioid pattern ensures high gain before feedback, maximum sound isolation, and consistent off-axis rejection.
Note: Location and room acoustics strongly affect the sound quality of microphones. To achieve the best overall sound for a particular application, it may be necessary to experiment with microphone placement and room treatments.
A supercardioid microphone has the greatest sound rejection at points 120° toward the rear of the microphone. Place the microphone so that unwanted sound sources, such as monitors and loudspeakers, are at these angles, not directly behind it. To minimize feedback and ensure optimum rejection of unwanted sound, always test microphone placement before a performance.
Recommended Loudspeaker Locations for Supercardioid Microphones
Thread the supplied stand adapter onto a floor or boom stand, then thread the microphone onto the adapter.
NOTE: To reduce low-frequency vibrations transmitted through the stand, use an isolating shock mount. Visit www.shure.com for more information.
The front of the microphone is marked by the Shure logo. Position this side toward the sound source.
A three-position switch on the back of the microphone lets you adjust the low-frequency response. Use the low-frequency filter to reduce wind noise, room noise, or proximity effect.
Flat response. Provides the most natural sound in most applications.
Low frequency cutoff. Provides an 18dB-per-octave cutoff at 80Hz. Helps eliminate floor rumble and low-frequency room noise from heating and air conditioning systems. This setting may also be used to compensate for proximity effect or to reduce low frequencies that make an instrument sound dull or muddy.
Low frequency rolloff. Provides a 6dB-per-octave rolloff filter at 115Hz. Use this to compensate for proximity effect or to reduce low frequencies that could make an instrument sound dull or muddy.
The attenuation switch lets you reduce the signal level without altering the frequency response. This can prevent extremely loud sounds from overloading the microphone.
0dB For "quiet" to "normal" sound levels.
-15dB For use with extremely loud sound sources such as drums, horns, or loud guitar cabinets.
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.
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.
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.
Condenser (externally biased)
20 to 20,000 Hz
Supercardioid
160 Ω
(at 1 kHz, open circuit voltage, typical)
-37 dBV/Pa[1] (14.1 mV)
(1 kHz at 1% THD)
| PAD ON | 1000 Ω load | 148 dB SPL |
| 2500 Ω load | 154 dB SPL | |
| PAD OFF | 1000 Ω load | 134 dB SPL |
| 2500 Ω load | 140 dB SPL |
(Ref. 94 dB SPL at 1 kHz)
86 dB[2]
(at 1 kHz)
| 1000 Ω load | 126 dB |
| 2500 Ω load | 132 dB |
(10 Hz to 10 kHz)
>50 dB
(20 Hz to 20 kHz, at 1% THD)
| 1000 Ω load | 2.0 dBV |
| 2500 Ω load | 8.5 dBV[3] |
| Attenuator Switch | 0, -15 dB |
| Low-Frequency Filter Switch | Flat, –6 dB/octave below 115 Hz, or –18 dB/octave below 80 Hz |
(typical, equivalent SPL, A-weighted)
8.5 dB SPL-A
Positive pressure on diaphragm produces positive voltage on pin 2 with respect to pin 3
Net
428 g 15 oz.)
Three-pin professional audio (XLR), male, balanced
11 to 52 V DC[4]phantom power, 6 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.
[4] All specifications measured with a 48 Vdc phantom power supply. The microphone operates at lower voltages, but with slightly decreased headroom and sensitivity.
Typical Frequency Response
Typical Polar Pattern
Overall Dimensions
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Black Mount/Swivel Adapter for Beta 27, KSM27, KSM32 and KSM44 |
A32M |
|
Padded, Zippered Carrying Bag for Beta 27, SM27 |
A27ZB |
|
Black Foam Windscreen for BETA 27, KSM27, KSM32, KSM42, KSM44, KSM44A, PG27, PG42 and SM27 |
A32WS |
| Popper Stopper® Pop Filter with Metal Gooseneck and Microphone Stand Clamp |
PS-6 |
| ShureLock® Rubber Isolated Shock Mount |
A27SM |
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
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