Shure BETA 98AMP User Manual

BETA 98AMP

Instrument Microphone
Microphone pour instruments
Instrumentenmikrofon
Microfono per strumento
Micrófono para instrumentos
Инструментальный микрофон

Wired Microphones

BETA 98AMP

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.

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General Description

The Shure Beta 98AMP is a compact, high-output, con­denser 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.

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.

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

The following table lists the most common applications and placement techniques. Keep in mind that microphone tech­nique is largely a matter of personal taste; there is no one “correct” microphone position.

APPLICATION SUGGESTED MICROPHONE PLACEMENT TONE QUALITY

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.

Medium attack; full, balanced
sound.

Maximum isolation; full, bal­anced sound.

Most “snap” from drumstick.

Maximum isolation; bright,
with plenty of attack.

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

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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

Cartridge Type Electret Condenser

Polar Pattern Cardioid

Frequency Response 20 to 20,000 Hz

Output Impedance 150Ω

Sensitivity

open circuit voltage, @ 1 kHz, typical

Maximum SPL

1 kHz at 1% THD

Signal-to-Noise Ratio

Dynamic Range

@ 1 kHz

Clipping Level

@ 1 kHz, 1% THD

Self Noise

equivalent SPL, A-weighted, typical

Common Mode Rejection

10 to 100,000 kHz

Polarity Positive pressure on diaphragm produces positive

Power Requirements 11–52 V DC

Net Weight 130 g (4.6 oz.)

[1]

1 Pa=94 dB SPL

[2]

THD of microphone preamplifier when applied input signal level is equivalent to cartridge output

at specified SPL

[3]

S/N ratio is the difference between 94 dB SPL and equivalent SPL of self noise, A-weighted

[4]

All specifications measured with a 48 Vdc phantom power supply. The microphone operates at

lower voltages, but with slightly decreased headroom and sensitivity.

[2]

[3]

–50.5 dBV/Pa

63 dB

31.0 dB SPL-A

≥60dB

voltage on pin 2 with respect to pin 3

[1]

(2.5 mV)

2500Ωload: 157.5 dB SPL
1000Ωload: 153.0 dB SPL

2500Ωload: 126.5 dB
1000Ωload: 122.0 dB

2500Ωload: 12.5 dBV
1000Ωload: 7.5 dBV

[4]

phantom power (IEC-61938), 5.5 mA

Accessories and Parts

Furnished Accessories

Universal Microphone Mount A75M
A75M Small Mic Clip A75-57F
Zippered Carrying Bag 95A2314
Snap-fit Windscreen 95A2064

Optional Accessories

Snap-Fit Windscreen (4 per package) RK183WS
Metal Locking Windscreen A412MWS
Mic Clip A57F

7.6 m (25 ft.) Cable C25E
A75M Large Mic Clip A75-25D
A75M Universal Microphone Adapter A75-UMA
Shock Stopper™ Isolation Mount A53M

Replacement Parts

Cardioid Cartridge RPM98A/C

CERTIFICATION

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.

The Declaration of Conformity can be obtained from:

Authorized European representative:
Shure Europe GmbH
Headquarters Europe, Middle East & Africa
Department: EMEA Approval
Wannenacker Str. 28
D-74078 Heilbronn, Germany
Phone: [phone]
Fax: [phone]
Email: [e-mail]

Note: Information in this guide is subject to change without notice. For the additional

information about this product, please visit www.shure.com.

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Beta 98AMP

182, 37 mm (7.18 in.)

20, 07mm

(0.79 in.)

32,77 mm

(1.29 in.)

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www.shure.com

United States, Canada, Latin
America, Caribbean:

Shure Incorporated
5800 West Touhy Avenue
Niles, IL 60714-4608 USA

Phone: [phone]
Fax: [phone] (USA)
Fax: [phone]
Email: [e-mail]

©2010 Shure Incorporated

Europe, Middle East, Africa:

Shure Europe GmbH
Wannenäckestr. 28,
74078 Heilbronn, Germany

Phone: [phone]
Fax: [phone]
Email: [e-mail]

Asia, Pacific:

Shure Asia Limited

22/F, 625 King’s Road
North Point, Island East

Hong Kong

Phone: [phone]
Fax: [phone]
Email: [e-mail]