Wired Microphones
BETA 98AMP
BETA 98AMP
Instrument Microphone
Microphone pour instruments
Instrumentenmikrofon
Microfono per strumento
Micrófono para instrumentos
Инструментальный микрофон
楽器用マイクロホン
악기 마이크
乐器话筒
©2010 Shure Incorporated
27A14268 (Rev. 1)
Printed in U.S.A.
General Description
Applications and Placement
General Rules for Use
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.
•
•
•
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.
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.
•
•
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.
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•
•
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.
Variations
•
Beta 98AMP/C: Beta 98AMP microphone furnished
with the A75M Universal Microphone Mount.
APPLICATION
SUGGESTED MICROPHONE PLACEMENT
TONE QUALITY
•
Beta 98AMP/C-3PK: includes three Beta 98AMP
microphones and three A75M Universal Microphone
Mounts.
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.
Medium attack; full, balanced
sound.
Remove bottom head and place a mic inside pointing up
toward top drum head.
Maximum isolation; full, bal-
anced sound.
Snare Drum
Cymbals
2.5 to 7.5 cm (1 to 3 in.) above rim of top head of drum.
Aim mic at drum head.
Most “snap” from drumstick.
Features
Close-mike with A75M mount, avoiding range of cymbal
movement
Maximum isolation; bright,
with plenty of attack.
•
Premier live performance microphone with Shure
quality, ruggedness, and reliability
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.
•
Uniform cardioid polar pattern for maximum gain
before feedback and superior rejection of off-axis
sound
Positioning the Microphone
•
Tailored frequency response shaped for drums and
percussion
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.
•
•
Wide dynamic range for use in high SPL environments
Compact design and integrated preamp reduce stage
clutter and ease setup
A75M Universal Microphone Mount
•
•
Flexible gooseneck for precise placement and easy
adjustments
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.
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
BETA 98AMP MOUNTED WITH A75M
3
Load Impedance
Accessories and Parts
Furnished Accessories
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 recom-
mends a minimum input load impedance of 1000 Ω. Most modern microphone preampli-
fiers meet this requirement. Higher impedance results in better performance for these
specifications.
Universal Microphone Mount
A75M Small Mic Clip
A75M
A75-57F
95A2314
95A2064
Zippered Carrying Bag
Snap-fit Windscreen
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.
Optional Accessories
Most modern mixers provide phantom power. You must use a balanced microphone
Snap-Fit Windscreen (4 per package)
Metal Locking Windscreen
Mic Clip
RK183WS
A412MWS
A57F
cable: XLR-to-XLR or XLR-to-TRS.
SPECIFICATIONS
7.6 m (25 ft.) Cable
C25E
Cartridge Type
Electret Condenser
Cardioid
A75M Large Mic Clip
A75-25D
A75-UMA
A53M
Polar Pattern
A75M Universal Microphone Adapter
Shock Stopper™ Isolation Mount
Frequency Response
Output Impedance
20 to 20,000 Hz
150 Ω
Sensitivity
open circuit voltage, @ 1 kHz, typical
–50.5 dBV/Pa[1] (2.5 mV)
Replacement Parts
Maximum SPL
2500 Ω load: 157.5 dB SPL
1000 Ω load: 153.0 dB SPL
Cardioid Cartridge
RPM98A/C
1 kHz at 1% THD[2]
Signal-to-Noise Ratio[3]
63 dB
CERTIFICATION
Dynamic Range
@ 1 kHz
2500 Ω load: 126.5 dB
1000 Ω load: 122.0 dB
Eligible to bear CE Marking. Conforms to European EMC Directive 2004/108/EC. Meets
Harmonized Standards EN55103-1:1996 and EN55103-2:1996, for residential (E1) and
light industrial (E2) environments.
Clipping Level
@ 1 kHz, 1% THD
2500 Ω load: 12.5 dBV
1000 Ω load: 7.5 dBV
Self Noise
equivalent SPL, A-weighted, typical
31.0 dB SPL-A
The Declaration of Conformity can be obtained from:
Authorized European representative:
Shure Europe GmbH
Common Mode Rejection
10 to 100,000 kHz
≥60 dB
Polarity
Positive pressure on diaphragm produces positive
voltage on pin 2 with respect to pin 3
Headquarters Europe, Middle East & Africa
Department: EMEA Approval
Wannenacker Str. 28
Power Requirements
Net Weight
11–52 V DC[4] phantom power (IEC-61938), 5.5 mA
130 g (4.6 oz.)
D-74078 Heilbronn, Germany
Phone: +49 7131 72 14 0
[1] 1 Pa=94 dB SPL
[2]THD of microphone preamplifier when applied input signal level is equivalent to cartridge output
at specified SPL
Fax: +49 7131 72 14 14
[3]S/N ratio is the difference between 94 dB SPL and equivalent SPL of self noise, A-weighted
Email: [email protected]
[4]All specifications measured with a 48 Vdc phantom power supply. The microphone operates at
lower voltages, but with slightly decreased headroom and sensitivity.
Note: Information in this guide is subject to change without notice. For the additional
4
Beta 98AMP
+20
+10
0
–10
-20
2
3
4 5 6 789
1000
2
3
4 5 6 789
10000 20000
20
50 100
Hz
180°
180°
150°
150°
150°
150°
120°
120°
120°
120°
90°
90°
90°
90°
–20 dB
–15 dB
–20 dB
–15 dB
60°
60°
60°
60°
–10 dB
–5 dB
–10 dB
–5 dB
30°
30°
30°
30°
0
0
250 Hz
500 Hz
2500 Hz
6300 Hz
1000 Hz
10000 Hz
32,77 mm
(1.29 in.)
20, 07mm
(0.79 in.)
182, 37 mm (7.18 in.)
21
Notes
22
Notes
23
Europe, Middle East, Africa:
Shure Europe GmbH
Wannenäckestr. 28,
United States, Canada, Latin
America, Caribbean:
Shure Incorporated
5800 West Touhy Avenue
Niles, IL 60714-4608 USA
Asia, Pacific:
Shure Asia Limited
22/F, 625 King’s Road
North Point, Island East
Hong Kong
74078 Heilbronn, Germany
Phone: 49-7131-72140
Fax: 49-7131-721414
Email: [email protected]
Phone: 847-600-2000
Fax: 847-600-1212 (USA)
Fax: 847-600-6446
Phone: 852-2893-4290
Fax: 852-2893-4055
Email: [email protected]
Email: [email protected]
©2010 Shure Incorporated
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