SHURE BETA 58A – Hypercardioid Vocal Microphone

In the tradition of the SM58^?, the Beta 58A dynamic microphone has become a top choice among vocalists and touring sound professionals.

The Shure Beta 58A is a high-output supercardioid dynamic vocal microphone designed for professional sound reinforcement and project studio recording. It maintains a true supercardioid pattern throughout its frequency range. This insures high gain-before-feedback, maximum isolation from other sound sources, and minimum off-axis tone coloration. The Beta 58A has a shaped frequency response that is ideal for close-up vocals. The superb performance of this microphone is not affected by rough handling because of its rugged construction, proven shock mount system, and hardened steel mesh grille. Typical applications for the Beta 58A include lead vocals, backup vocals and speech.

• Smooth, extended frequency response for outstanding sound for professional live vocal use
• Consistent supercardioid pattern provides the best gain-before-feedback among dynamic microphones
• Pneumatic shock mount reduces handling noise
• Frequency response: 50 to 16,000 Hz

• Frequency response tailored for vocals, with brightened midrange and bass rolloff to control proximity effect
• Uniform supercardioid pattern for high gain before feedback and superior rejection of off–axis sound
• Neodymium magnet for high signal–to–noise output
• Hardened steel mesh grille that resists wear and abuse
• Advanced pneumatic shock mount system that minimizes transmission of mechanical noise and vibration
• Minimally effected by varying load impedance
• Legendary Shure quality and reliability

The first Neumann microphone with a dynamic capsule. Functionally optimized design
specifically for the broadcast field, featuring integrated pop protection, suppression of
structure-borne noise and a hypercardioid directional characteristic. 
Emotion conveyed with technical perfection. This is the ideal which the Neumann
microphones in the Broadcast Line have been designed to fulfill. The fine-tuning to the
requirements of professional broadcast studios and the individual, functionally optimized
design* ensure that these are microphones of character.
The BCM 705 is Neumann?s first dynamic microphone. The housing and headgrille are
identical to those of the BCM 104; only the green logo indicates that this is something new
from Neumann. The principle of reduction to the essentials can be seen in the dynamic
capsule with a hypercardioid directional characteristic, specifically designed for speech
reproduction at close range. Multi-level isolation from structure-borne noise ensures operation
free of interference, even in a lively studio environment.
Mechanical Features
The microphone headgrille twists off easily for quick cleaning. Neumann offers optional,
color-coded headgrilles so that, for reasons of hygiene, each announcer can use his or her
individual headgrille. Iin front of the capsule, mounted on a frame holder, a fine gauze serves
as a built-in popscreen.
The microphones of the Broadcast Line have an elastic mount against structure-borne noise,
that is compatible with standard broadcast-segment microphone arms.
Acoustic features
The frequency response has a light treble boost, in the region from 2 kHz to 9 kHz, aiding the
speech intelligibility. The bass frequency response is designed to compensate for the overemphasis
of the bass caused by the proximity effect.
The integrated Pop Screen
A pop screen not only prevents the occurrence of plosive pop noises in vocal recordings, but also
efficiently prevents unwanted particles, from respiratory moisture, nicotine, to food remnants, from
settling on the diaphragm. The pop screen can be removed for cleaning without the use of tools.
Mounting
The preferred mode of operation is to suspend the BCM 104 or BCM 705 from a standard studio
boom arm.
A thread adapter to fit different connector threads is included. In order to provide protection from
structure-borne noise, both the capsule and the microphone in its mount are elastically suspended.

The optional SG 5 swivel mount allows additional angling of the microphone by +/-90 degrees.
 
FEATURES:
Dynamic capsule
Hypercardioid directional characteristic
Characteristic, functionally optimized design*
Integrated, neutral pop protection
Integrated elastic suspension
Individual headgrilles for different users
Colored rings to identify the replacement headgrilles
Easy removal and cleaning of microphone headgrille (with bayonet mount)
Mechanical compatibility with standard studio boom arms
Multi-level isolation from structure-borne noise
No power supply required

APPLICATION HINTS:
Announcer's mic for broadcasting and studio

This is just one of the most common applications. We recommend
additional experimentation to gain maximum use from this microphone.

TECHNICAL DATA:
Acoustical operating principle Pressure gradient transducer
Directional pattern Hypercardioid
Frequency range 20 Hz ... 20 kHz
Sensitivity at 1 kHz into 10 kohm 1,7 mV/Pa = ?55,4 dB ± 1 dB
Rated impedance 200 ohms
Rated load impedance >= 10,000 ohms
Equivalent SPL CCIR 468-3 32 dB
Equivalent SPL DIN/IEC 651 18 dB-A
S/N ratio CCIR 468-3 62 dB
S/N ratio DIN/IEC 651 76 dB
Weight 500 g
Diameter 64 mm
Length 85 mm
Height (without suspension) 110 mm

• Rugged performance microphone designed for backing vocals and instruments
• Rugged wire mesh cap with internal windscreen
• Die-cast metal body
• Complete with stand adapter and zip bag
• On/Off switch

• Polar pattern Cardioid
• Frequency range 40 to 18,000 Hz
• Sensitivity 2.5mV/Pa
• Max. SPL 144 dB SPL
• Recommended load impedance >=2,000 ohms

• Tailored for Vocals & Speech
• Cardioid Polar Pattern
• Shock-Mounted Dynamic Cartridge
• 50 Hz to 15 kHz Frequency Response