General Description; Performance Characteristics - Shure BETA 98AMP Manual Del Usuario

General Description

The Shure Beta 98AMP is a compact, high-output, con-
denser microphone for professional sound reinforcement
and studio recording. An extremely uniform cardioid
polar pattern provides excellent gain-before-feedback,
off-axis rejection of unwanted noise, and performance in
high sound pressure level (SPL) environments.
The Beta 98AMP features an integrated preamplifier with
XLR connection, a flexible gooseneck, and is packaged
with the A75M Universal Microphone Mount accessory
for precision adjustments and minimal stage clutter. For
use with drums, percussion, and other fixed-placement
applications.
Variations
• Beta 98AMP/C: Beta 98AMP microphone furnished
with the A75M Universal Microphone Mount.
• Beta 98AMP/C-3PK: includes three Beta 98AMP
microphones and three A75M Universal Microphone
Mounts.
Features
• Premier live performance microphone with Shure
quality, ruggedness, and reliability
• Uniform cardioid polar pattern for maximum gain
before feedback and superior rejection of off-axis
sound
• Tailored frequency response shaped for drums and
percussion
• Wide dynamic range for use in high SPL environments
• Compact design and integrated preamp reduce stage
clutter and ease setup
• Flexible gooseneck for precise placement and easy
adjustments
• Enamel coated metal construction and stainless steel
inner grille resist wear and abuse

Performance Characteristics

• Exceptional low-frequency reproduction
• Extremely high SPL handling
• High output level
• No crossover distortion
Applications and Placement
General Rules for Use
• Aim the microphone toward the desired sound source; angle unwanted sounds toward its null point.
• Use the fewest amount of microphones as practical to increase the Potential Acoustic Gain and prevent feedback.
• Follow the 3 to 1 Rule by spacing each microphone by at least three times the distance to its source to reduce
Phase Cancellation.
• Place microphones as far as possible from reflective surfaces to reduce Comb Filtering.
• When using directional microphones, work closely to the microphone for extra bass response to take advantage of
Proximity Effect.
• Avoid excessive handling to minimize pickup of mechanical noise and vibration.
• Do not cover any part of the microphone grille, as this will adversely affect microphone performance.
• Add a windscreen when using the microphone outdoors.
The following table lists the most common applications and placement techniques. Keep in mind that microphone tech-
nique is largely a matter of personal taste; there is no one "correct" microphone position.
APPLICATION SUGGESTED MICROPHONE PLACEMENT
Tom-Toms One mic on each tom or between a pair of toms, 2.5 to
7.5 cm (1 to 3 in.) above drum heads.
Remove bottom head and place a mic inside pointing up
toward top drum head.
Snare Drum 2.5 to 7.5 cm (1 to 3 in.) above rim of top head of drum.
Aim mic at drum head.
Cymbals Close-mike with A75M mount, avoiding range of cymbal
movement
NOTE: Before each use, make sure the cartridge is tightly secured on the microphone, as vibration and accidental hits
with drumsticks may loosen it, resulting in signal loss.
Positioning the Microphone
The flexible gooseneck allows precise adjustments to the microphone without moving the mount.
Note: Excessive twisting or forcing the gooseneck into extreme positions can permanently damage the microphone.
A75M Universal Microphone Mount
The Shure A75M mounts the Beta 98AMP on a variety of surfaces and instrument hardware. Reference the furnished
A75M guide to correctly mount the microphone.
BETA 98AMP MOUNTED WITH A75M
TONE QUALITY
Medium attack; full, balanced
sound.
Maximum isolation; full, bal-
anced sound.
Most "snap" from drumstick.
Maximum isolation; bright,
with plenty of attack.
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