Shure TL1073 manual General Description, Features, Performance Characteristics, Contour Switch

Model Beta 91A Wired Microphones

Specification Sheet

BETA 91A Instrument Microphone

General Description

The Shure Beta 91A is designed for use with kick drums, piano and other traditional low frequency applications. An updated microphone capsule is tailored for bass-heavy environments to produce a powerful low frequency response, and a new design integrates the preamplifier and XLR connec- tion for easy setup and minimal stage clutter. The Beta 91A combines superior attack and punch for studio-quality sound, even at extremely high sound pressure levels (SPLs).

Features

•Premier live performance microphone with Shure quality, ruggedness, and reliability

•Uniform half-cardioid polar pattern (in the hemisphere above mounting surface) for maximum gain before feedback and rejection of off-axis sound

•Tailored frequency response for kick drums and bass-heavy instruments

•Wide dynamic range for use in high SPL environments

• Two-position contour switch enhances attack and clarity

•Integrated preamp and XLR connector reduce stage clutter and provide a quick, secure setup

•Low profile design requires no external mounting hardware

•Steel grille and die-cast metal construction resist wear and abuse

Performance Characteristics

•Exceptional low-frequency reproduction

•Extremely high SPL handling

•High output level

•No crossover distortion

Applications and Placement
Half-cardioid Polar Pattern
Boundary microphones pick up
sound in a cardioid polar pattern in
the hemisphere above the mounting
surface. Keep sound sources within								60
the 60 degree range above this
surface.
	150°	180°					150°		180°
			150°						150°
	120°			120°		120°				120°
90°				90°		90°				90°
		–20 dB						–20 dB
		–15 dB						–15 dB
	60°	–10 dB		60°		60°		–10 dB		60°
		–5 dB							–5 dB
	30°		30°				30°		30°
			0						0
			250 Hz						6300 Hz
			500 Hz						10000 Hz
			1000 Hz
	+20
	61 cm (2 ft.) from sound source
	+10
dB	0
	–10
	EQ
	-20		2	3	4 5 6 789		2	3	4 5 6 789
	20	50								20000
			100			1000			10000

Hz

Contour Switch

A two-position switch on the bottom of the microphone lets you selectively filter the low-mid frequency response without additional tools. Use this fil- ter to enhance the attack and clarity of bass-heavy instruments.

	Flat response: Provides the most
	natural sound in most applications.
	EQ
EQ	Low-Mid Scoop: This setting tai-
	lors the microphone’s frequency
	response to provide a strong ‘punch’
	in the low frequencies, and plenty of
	attack in the higher frequencies.

Mounting the Microphone

For long-term installation, mount the Beta 91A to a surface using the mounting holes on the bottom of microphone.

TL1073 (Rev. 1)	Printed in U.S.A.
©2010 Shure Incorporated