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SR109 Professional Mixer
FUNCTIONAL IDENTIFICATION (Refer to Figures 1 and 2,
Page 2.)
NOTE: All front panel controls are numbered for ref-
erence only.
Individual Channel Volume Controls (Eight)
-
Con-
trol volume and input clipping level of each channel
separately. Channel 1 contains TONE OSCillator
push-pull Switch
-
Pulling switch outward turns os-
cillator on, and rotating control adjusts level of 1
kHz tone generated internally for set-up purposes.
Individual Channel FREQuency EQualizer-LOW Ro-
tary Controls (Eight) -Adjust
low-frequency signal
equalization for each channel.
Individual Channel FREQuency EQualization-Hlgh
Rotary Controls (Eight) -Adjust
high-frequency sig-
nal equalization for each channel.
LIMITER Indicator Lamp
-
lndicates limiting action
when LIMITER Switch (11) is turned on (IN).
OVERLOAD Indicator Lamp
-
lndicates Mixer over-
load condition (output clipping) when LIMITER
Switch (11) is turned off (OUT).
True VU Meter
-
lndicates volume level of program
output. (Meets all current standards for VU Meters.)
PHONES Rotary Control
-
Controls volume level to
PHONES Jack (8).
PHONES Output Jack-
Provides for connection of
stereo or monophonic headphones for monitoring.
through 8 inputs, or line level sources to channels 7
and 8.
MIC/LINE Slide Switches (Two) -Select
low-impe-
dance (MIC) or line level (LINE) input connections for
channels 7 and 8.
LlNK OUTPUT Phone Jack
-
Provides output con-
nection to external equipment or common mix bus to
combine two or more Mixers.
LlNK INPUT Phone Jack
-
Provides input connection
from external equipment (compressor, limiter, equal-
izer, etc.).
PROGRAM OUTPUTS/LINE LEVEL Three-Pin Con-
nector
-
Provides balanced output connection to
power amplifier.
PROGRAM OUTPUTS/LINE LEVEL Phone Jacks
(Two)
-
Provide balanced or unbalanced output con-
nection to power amplifier.
PROGRAM OUTPUTS/MICROPHONE LEVEL Three-
Pin Connector
-
provides low-impedance micro-
phone-level program output.
VOLTAGE SELECTOR Slide Switch -Selects
oper-
ating voltage range of 90 to 132 or 180 to 250 Vac,
50/60 Hz (SR109-2E only).
AC (MAINS) POWER 3-Pin Connector
-
Connects ac
line cord to Mixer power supply (SR109-2E only).
180-250V 0.1 AT/90-132V 0.2AT SLO-BLO Ac Fuse
-
Protects Mixer ac input line against overload
(SR109-2E only).
9.
MASTER Volume Rotary control and POWER switch
-Adjusts
level of totai program output, and applies
ac power to power supply and SWITCHED AC
GENERAL OPERATING INSTRUCTIONS
Receptacle.
THRESHOLD ADJustment Screwdriver-Adjustable
Control -Sets
threshold level of limiter function.
LIMITER IN-OUT Slide Switch -Turns
program out-
put limiter on and off.
Ac Grounded Line Cord
-
Connects ac power source
to Mixer power supply (SR109 only).
3AG-3/16A SLO-BLO Ac Fuse
-
Protects Mixer ac
input line against overload (SR109 only).
SWITCHED AC Grounded Receptacle
-
Provides up
to 500 watts of unfused switched ac power to acces-
sory equipment (SR109 only).
PROGRAM OUTPUTS/PHASE Slide Switch
-
Re-
verses phase (polarity) of LINE LEVEL and MICRO-
PHONE LEVEL program outputs with respect to
inputs.
VU METER RANGE Slide Switch
-
Selects VU meter
(6) sensitivity for three ranges of program level indi-
cation in dBm.
ACCESSORY OUTPUT/AUX LEVEL 1 1-Pin Con-
nector
-
Provides output connection to Shure SR110
Monitor Mixer.
15 dB ATTENUATORS/IN-OUT Slide Switches (Eight)
-
Provide choice of input signal attenuation for each
channel.
INPUTS/MICROPHONE LEVEL LOW IMPEDANCE
Three-Pin Jacks (Eight)
-
Provide for balanced con-
nection of low-impedance sources to channels 1
W A R N I N G
Voltages in this equipment are hazardous to life.
Make all input and output connections before ac
power is connected. Refer servicing to qualified
service personnel.
1. Using hardware provided, install Mixer securely in
standard 19 in. (483 mm) rack or optional A105A Car-
rying Case prior to making electrical connections.
2.
Set front-panel switches to off or OUT and all controls
to 0. Set rear-panel PHASE Switch (15) to OO.
3.
Connect desired PROGRAM OUTPUT/LINE LEVEL
Connector (23, 24) to power amplifier input connect-
ing cable. (NOTE: Shure SR105 Power Amplifiers are
supplied with audio connecting cables.) If Mixer out-
put is to be fed to another mixer or tape recorder
microphone input, use PROGRAM OUTPUT/MICRO-
PHONE LEVEL Connector (25). If desired, connect
monophonic or stereo headphones to front-panel
PHONES Jack (8). Connect speakers to power ampli-
fier.
4.
Connect one or more low-impedance microphones to
rear-panel INPUTS/MICROPHONE LEVEL LOW IM-
PEDANCE Connectors (19). Any high-quality dynamic,
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