Shure M615AS Datasheet

M615AS-2E EQUALIZATION
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AREA CODE 3121866-2200 CABLE: SHUREMICRO
TWX: 910- 231-004s TELEX: 72.4381
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ANMYzEn SYSTEM
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GENERAL
The Shure Model M615AS Equalization Analyzer Sys-
tem is designed to permit rapid and accurate adjustment
of the frequency response of a sound reinforcement,
monitoring, or playback system incorporating an equal-
izer such as the Shure Model SR107 Audio Equalizer or
M610 Feedback Controller. The M615AS consists of the
M615 Equalization Analyzer, ES615 Analyzer Microphone,
their various accessories, and a portable case. (The M615
and ES615 are also available separately.)
The M615 provides two major functions. First, it is a
source of equal-energy-per-octave random noise ("pink
noise"), available at microphone and auxiliary levels with
adjustable output, to serve as a test signal source. Sec-
ond, the M615 accepts the output of the ES615 Analyzer
Microphone (or other microphone) or an auxiliary-level
signal, and indicates the relative energy in each of 10
octave bands. Two light-emitting diodes (LEDs) for each
octave indicate whether the energy is below a given LO
(reference) level, above an adjustable HI level, or (if both
LEDs are off) between the two levels (within the enve-
lope). The object is to adjust the sound system equalizer
to turn off the LEDs of the M615, thereby producing a
system response which is within the envelope. With
minimum envelope size (2 dB) and all LEDs off, the result-
ant octave-energy frequency response curve will be
smooth within approximately k 1 dB. Two resultant
curves may be selected: flat, or the 3 dB per octave
rolloff above 1 kHz typical of most desired "house curve"
responses. Two overload LEDs, a microphone input at-
tenuator, and an input level control are also provided. A
switch provides either microphone input low-frequency
response compensation for the ES615 Analyzer Micro-
phone or a flat frequency response characteristic.
The ES615 Analyzer Microphone is an omnidirectional,
dynamic, measurement microphone. Its broad, flat fre-
quency response with controlled low-frequency rolloff is
designed specifically for use with the M615 Analyzer.
The M615AS includes a microphone cable, swivel
adapter, tilt bracket, test/interconnecting cable and sys-
tem carrying case.
The Model M615AS-2E Equalization Analyzer System
is identical to the Model M615AS, except that it contains
the Model M615-2E Equalization Analyzer instead of the
Model M615. The M615 operates from 108-132 Vac and
the M615-2E operates from 90-125 or 180-250 Vac
(switch-selectable).
The M615 (only) is listed by Underwriters' Laboratories,
Inc., and listed by Canadian Standards Association as
certified.
Model M615AS Features:
Permits rapid and accurate adjustment of octave
band equalizers in sound systems
Pink noise generator with microphone- or aux-level
output
Ten octave bands from 32 Hz to 16 kHz
Rugged LED High and Low indicators
Selectable resultant octave-energy curve: flat for near
field equalization or 3 dB per octave rolloff above
1 kHz for reverberant field equalization
LED microphone and input overload indicators to as-
sure accurate equalization
Adjustable input and pink noise output levels
Microphone input with high/low impedance selectors,
15 dB attenuator and flat/ES615 frequency response
selector switches
Adjustable envelope from 2 to 12 ( + I to 2 6 ) dB
Aux output jack for monitoring or connection to ac-
cessory instrumentation
Tilt bracket permits positioning Analyzer at con-
venient viewing angle
Sturdy carrying case for all System components
SPECIFICATIONS
EQUALIZATION ANALYZER
All signal levels referred to are pink noise levels.
Inputs
IMPEDANCE LEVEL CONNECTOR
High or Low MIC 3-pin professional female*
High
AUX phone and phono pin jacks
Outputs
IMPEDANCE LEVEL CONNECTOR
Pink Noise Generator
High or Low MIC 3-pin professional male'
Pink Noise Generator
High AUX phone and phono pin jacks
Analyzer
High AUX phono pin jack
Designed to mate with Cannon XL series, Switchcraft A3 (Q.G.) series or
equivalent connector
Copyright 1978, Shure Brothers Inc.
27A1350 (RB)
Printed in U.S.A.