Shure SR107 Datasheet

2 2 2 HARTREY AVE.. EVANSTON. IL. 6 0 2 0 4 U.S.A.
MODEL SR107
AREA CODE 312/866.2200 CABLE: SHUREMICRO
AUDIO EQUALIZER
TWX: 9 1 0 - 2 3 1 - 0 0 4 8 TELEX: 72.4381
I
OPERATION AND SERVICE MANUAL
The Shure SR107 Audio Equalizer is a compact, versa-
tile unit designed to provide adjustment of tonal balance
on an octave-by-octave basis across the audio frequency
range. The SR107 is used in sound system applications
for the purposes of feedback control in live performances,
playback equalization (correcting for equipment response
and/or room acoustics in prerecorded performances), and
improvement in the sound quality of live performances.
Equipment response correction includes the elimination
of such problems as transducer incompatibility, overload
at low frequencies (rumble), tape hiss and disc surface
noise. The SR107 is a balanced input and output line level
device, designed primarily for installation between the
audio console or mixer and the power amplifier of the
sound system.
DESCRIPTION
The SR107 has ten octave band, minimum phase, com-
bining type filters centered on ISO? preferred frequencies
from 31 Hz to 16 kHz. Each filter is adjustable for ap-
proximately 15 dB of boost or attenuation. The equalized
output is adjustable over a 2 1 5 dB range, and overall
gain of up to 20 dB may be introduced to compensate for
low input signals. A peak-responding overload light-
emitting diode (LED) is provided on the front panel. The
SR107 contains both professional three-pin and phone
jack input and output connectors, and a phone jack
auxiliary output.
The SR107 is designed for maximum simplicity of op-
eration and maintenance. All components are of the high-
est quality and are operated well within their respective
ratings to assure maximum reliability under normal use
conditions.
The SR107 and SR107-2E are identical except that the
SR107 operates from 108-132 Vac, 50/60 Hz and the
SR107-2E operates from either 105-125 or 210-250 Vac,
50/60 Hz (switch-selectable). The SR107-2E is supplied
with a detachable ac line cord (without power plug). The
SR107 (only) is listed by Underwriters' Laboratories, Inc.,
and is listed by Canadian Standards Association as
certified.
All SR107 units are supplied with four rack-mounting
screws for mounting in standard 19-inch (483 mm) audio
equipment racks or in optional Shure A30A or A105A
Carrying Cases. An optional protective cover, Shure
Model A107A, is also available.
SPECIFICATIONS
*
Equipment Type
. . . . .
.All transistor inductorless active
equalizer
Voltage Gain:
GAlN Control
at UNITY
. . . . . . .
.O dB LINE INPUT to LINE OUT-
PUT
-27 dB LlNE INPUT to AUX
OUTPUT
-50 dB LlNE INPUT to MIC
OUTPUT
GAlN Control
at +20 dB
. . . . . . .
+20 dB LINE INPUT to LINE
OUTPUT
- 7 dB LlNE INPUT to AUX OUT-
PUT
-30 dB LlNE INPUT to MIC
OUTPUT
LEVEL Control
. . .
.Provides additional gain adjust-
ment of k 1 5 dB over values
given above, EQUALIZER IN
mode only.
Frequency Response
.
.%2 dB from 30 Hz to 20 kHz,
EQUALIZER IN or BYPASS
Signal to Noise Ratio
. . . . .
(20 Hz-20 kHz) .Typically 99 dB at maximum out-
put with Filter Controls and
LEVEL Control at zero and
GAlN Control at UNITY in
EQUALIZER IN mode.
Output Noise,
Maximum
(300 HZ-20 kHz
. . .
at LINE OUTPUT) -84 dBV (63 pV)
- 69 dBV (0.50 mV), LEVEL Con-
trol at +15, Filter Controls at
- 15
-91 dBV (28 pV), EQUALIZER
Switch in BYPASS
Output Hum and Noise,
Maximum
(20 HZ-20 kHz
at LINE OUTPUT)
. . . -
83 dBV (71 pV)
-
67 dBV (0.56 mV), LEVEL Con-
trol at +15, Filter Controls at
-15
-88 dBV (40 pV), EQUALIZER
Switch in BYPASS
lnput Common Mode
Rejection
. . . . . . . . .
.90 dB minimum at 100 Hz
Clipping Level
(30 HZ-20 kHz):
Input
. . . . . . . . . . . .
+18 dBm minimum (+15.8 dBV,
6.2V) GAlN Control at UNITY
- 2 dBm minimum (-4.2 dBV,
0.62V) GAlN Control at
+
20dB
t
International Organization for Standardization
Copyright
1979, Shure Brothers Inc.
27Al089 (SF)
'See
Page 2
Printed in U.S.A.