Shure SR110-2E Datasheet

I

222

HARTREY

AVE..

EVANSTON. IL.

60204 U.S.A.

1

MODEL SR110 A)

.--

-

8

qD

MICROPHONES

AND

ELECTRONIC

COMPONENTS

I

1

UW

A

SRI 10-2E

PROFESSIONAL

AKtA

I;uUt

31ZIXbb.ZZUU . LAMLt:

bHuKtMILKU

I

SHEET

MONITOR MIXERS

I

I

TWX:

910-231-0048 TELEX: 72-4381

I

OPERATION AND

DESCRIPTION

The Shure Model SR110 Professional Monitor Mixer

is a rack-mounted, eight-channel, line level mixer, de-

signed as an accessory for the Shure Model

SRlO1

Series 2 Audio Console or SR109 Professional Mixer.

It can also be used with similar equipment when a
separate stage monitor mixer is desired to be added
to a sound reinforcement system. The

SR110 can also
be used in multi-track recording applications as a re­cording mix panel or in stereo broadcasting.

Interconnections between the

SR110 and the SRlO1
or SR109 are made through a single multi-pin con­nector and cable permanently attached to the SRllO.

The

SR110 also contains a matching female multi-pin

connector for "stacking" additional

SRllOs.

The SR110 provides eight high-impedance, unbal­anced, line level inputs to its mixing circuitry, and one
high-impedance, unbalanced line level input to its
output selector switch for monitoring program mate­rial. The output of the

SR110 is a 600-ohm balanced
line level with one three-pin male professional audio
connector and two standard

'/4

inch three-circuit

phone jacks, connected in parallel.

The front panel of the SRllO contains eight rotary

volume controls for channel gain, and a combination

rotary master volume controllpower-off switch. An

output selector slide switch, headphones jack and

neon power indicator lamp are provided. Silicon
transistors and other solid-state devices are used
throughout. All components are of the highest quality,
and are operated well within their respective ratings
to assure maximum reliability under normal use con-

ditions.

The

SR110 and SR110-2E are identical except that
the SRllO operates from 108-132 Vac, 50160 Hz, and
the

SRllO-2E operates from either 105-125 or 210-250

Vac, 50160 Hz (switch-selectable).

SR110 Mixers are supplied with four rack-mounting
screws for mounting in standard 19 in. (483 mm) audio
equipment racks or in an optional Shure

A105A Carry-

ing Case (mounted with an

SR109). In addition, the
SR110-2E is supplied with a detachable ac line cord
(without power plug). The

SRl10 (only) is listed by

Underwriters' Laboratories, Inc., and is listed by

Canadian Standards Association as certified.

SPECIFICATIONS

Type

.

. . . . . . . . .

. .

.

.All silicon transistor monitor

mixer

SERVICE MANUAL

Number of lnput

Channels

. . . . . . .

.8 mixed inputs; 1 program input

Power Output

. . . . .

.

+19.2 dBm (LINE LEVEL Output)

Voltage Gain*

Mixed

Inputs**

. . .

. . .

.38 i2.5 dB (LINE LEVEL Output)

14.5

t2.5 dB (PHONES Output)

-8

+-2

dB (MIX BUS)t

Program

Input**

. . . . . .

.

.40 +-2 dB (LINE LEVEL Output)

Frequency

Response

. . .

lnput Sensitivity

.

. .

Distortion

. .

. . . . .

.

.

Noise

(300 HZ-20

kHz)

Mixed

Inputs**

.

. . . . .

.

i3 dB, 20 Hz-20 kHz (LINE

LEVEL Output)

.21

mV max. for +4 dBm line

level output

.THD less than 1 % at + 12 dBm,

30 Hz-20 kHz; IM distortion
less than 1 % at +12 dBm

.

-

68 dBV max. (MASTER
Volume Control down)

.

-54 dBV max. (MASTER and
channel Volume Controls up)

Program

Input**

. . .

. . . . .

-58 dBV max. (MASTER
Volume Control up)

Hum and Noise

(20 Hz-20 kHz)

. .

.

-

64 dBV max. (MASTER
Volume Control down)

Mixed

Inputs**

. . . . . . .

-50 dBV max. (MASTER and
channel Volume Controls up)

Program

Input**

.

. . .

. . . .

-54 dBV max.

(MASTER

Volume Control up)

lnput Clipping

Level at

1 kHz

. . .

.2.5V min. on mixed inputs 1-8

with channel Volume Controls
set at max. (input clipping
level increases with decreased
setting of channel Volume

Control)

lnput Impedance

at 1 kHz:

Mixed

Inputs**

. . . . . .

.23.5

kilohms

Program

Input**

. . . .

. . .

.30

kilohms

*Measurement conditions: Inputs through

150

ohms, LINE LEVEL output

terminated in

600

ohms,

PHONES

output terminated in 8 ohms,

MASTER

and channel Volume full up.

**OUTPUT SELECTOR

Switch position.

+MIX

BUS

terminated

in

5.6k.

Copyright 1979, Shure Brothers Inc
27A1291

(56)

Printed in

U.S.A.

FIGURE A. SR110 FRONT PANEL

4

Output Impedances: 3. MASTER Volume Rotary Control/POWER OFF

Line Level

.

. . . .

..Balanced 120 ohms actual (for Switch-Adjusts level of total monitor output and

use with 600-ohm lines)

applies ac power to power supply.

Headphone

. . . .

.

.12 ohms actual (for use with 4-

4.

PHONES Output Jack-Provides for connection of

to 16-ohm headphones)

stereo or monophonic headphones for monitoring.

Mix Bus

. . . . . .

.

.

.5.6 kilohms 5. OUTPUT SELECTOR Slide Switch-Selects be-

Phasing

. . .

.

. . . . . . .Pins 1 through 8 of ACCESSORY

tween signal mixed in SRllO (MIXED INPUTS) or

connector are out of phase

mixed in

SRlO1 or SR109 (PROGRAM INPUT).

with,

and

pin 9

is

in phase

6. MONITOR OUTPUTS/LINE LEVEL Three-Circuit

with, pin 3 of

LlNE LEVEL out-

Phone Jacks (Two)-Provide balanced Monitor

put

&pin connector, tips of

Mixer output connection to power amplifier or

LINE LEVEL and PHONES recording equipment.

jacks,

and

tip

of

MIX

BUS

7. MONITOR OUTPUTS/LINE LEVEL 3-Pin Male

phono pin jack

Connector-Provides balanced Monitor Mixer out­put connection to power amplifier or recording

Controls

. . . .

. . . . . . .Channel Volume: rotary, linear

taper; MASTER Volume:

equipment.

rotary, audio taper

8. ACCESSORY INPUT AND OUTPUT Cable

&

Multi-

Pin Male Connector-Provides for input connec-

Operating Voltage

. . .

SR110: 108-132 Vac, 50/60 Hz.

tions from Shure

SR101 or SR109 or similar equip-

SR110-2E:

105-1 25 or 21 0-250

ment.

Vac, 50/60 Hz.

9. ACCESSORY INPUT AND OUTPUT Multi-Pin

Fe-

Power

male Connector-Provides for connection of

addi-

Consumption

. . . .

.3 watts max. (Mixer only)

tional parallel-wired (tandem)

SRll 0s.

500

watts

max. (non-switched

10. MIX BUS Phono Jack-Provides common mix bus

ac receptacle)

(SR110 only)

when two

SRlOls or SRlO9s and two SRllOs are

Temperature:

to be operated in a common mix mode.

Operating

. . .

. .

. . . -7" to 54°C (+20° to 130°F) 11. Ac Grounded Line Cord-Connects ac power

Storage

. . . . . .

. . . -29" to 71°C (-20" to 160°F)

source to

SR110 power supply (SRllO only).

Dimensions

. . . . . . . .44.4 mm height X 483 mm 12. Non-Switched Ac Grounded Receptacle-Provides

width X 232 mm depth (1

3/4

in.

up to 500 watts of non-switched ac power to

ac-

X 19 in. X 9% in.)

cessory equipment

(SR110 only).

Weight

. .

. . .

. . . . .

. .3.9

kg (8 Ib, 8 oz)

13. AC (MAINS) POWER 3-Pin Connector-Connects

Finish

. . . . .

.

. .

. . . . .

Matte

black

unit to ac (mains) power source via supplied line

Installation

.

. . . .

. . . .Equipped for standard 19 in.

cord

(SR110-2E only).

(483 mm) audio rack mount-

14. VOLTAGE SELECTOR Slide Switch-Selects 105-

ing;

may be operated in

125V or 210-250V input power

(SR110-2E only).

optional-~105~' Carrying Case

(with

SR109)

General Operating Instructions

Certifications . . . . . . .Listed by Underwriters' Labora-

tories,

Inc.; listed by Canadian
Standards Association as
certified (SR110 only)

OPERATING

INSTRUCTIONS

Functional Description

(Refer to Figures A and B)

1. Individual Channel Volume Rotary Controls (Eight) 1. Using hardware provided, install

SR110 securely

-Control volume of each channel separately.

in standard 19 in. (483

mm) rack or optional A105A

2.

Power-On Indicator Lamp-Indicates ac power is Carrying Case (with SR109) prior to making
being applied to unit. electrical connections.

WARNING

To reduce the risk of fire or electric shock,
do not expose this appliance to rain or ex­treme moisture.

-

AC

IMAINS!

POWER

*'c,,X?,I

-0.'

.*O

OL'?.,

?..Ll.i..

I,&

.dl

1,1*

.:,

,,

2

>>.>

IL'

IT

w

"1

$",*I

/

13

\

SR110-2E

ONLY

14

FIGURE

B.

SR110 REAR PANEL

2.

Connect SR110 MONITOR OUTPUTS/LINE LEVEL
3-pin connector and/or phone jacks (7,

6)

to

power amplifier and/or recording equipment.

3. Connect

SR110 ACCESSORY INPUT AND OUT-

PUT Multi-Pin Male Connector

(8)

to SRlOl or

SR109.

4. If additional SRllO is to be used (tandem opera­tion), connect ACCESSORY INPUT AND OUTPUT
Multi-Pin Male Connector (8) of second

SR110 to
ACCESSORY INPUT AND OUTPUT Female Con­nector (9) of first

SR110.

5. If common mix between two SRlOls or SRlO9s
and two SRllOs is desired, interconnect MIX BUS
Phono Jacks (10) of each SR110 and interconnect
the link output jacks of the SRlOls or

SRlO9s.

6. (SRl10-2E only) Move VOLTAGE SELECTOR
Switch (14) to 115V or 220V position as required.

7.

Connect ac line cord to grounded 108- to 132-volt
(SRl1 O), or 105-1 25V or 21 0-250V (SR110-2E),
50/60

Hz

ac source.

8. Turn on front-panel POWER OFF Switch on
MASTER Volume Control (3). Red indicator lamp
(2) will light, indicating power is being applied.

9. Adjust

SRlO1 or SR109 and associated power

amplifier for desired operating levels.

10. Adjust SRllO and associated power amplifier
and/or recording equipment for desired operating
levels.

11. Set OUTPUT SELECTOR Switch (5) to MIXED IN­PUTS or PROGRAM INPUT as desired.

Mounting and Ventilation

The

SRl10 Professional Monitor Mixer is designed
for rack-mounting in a standard 19 in. (483 mm) audio
equipment cabinet rack and is supplied with the nec­essary mounting hardware (see Figure C). If possible,
the

SR110 should be rack-mounted above its as-

sociated

SRl 01 or SR109.

The SR110 may also be operated while mounted in

a Shure

A105A Carrying Case. The A105A will accept
panel heights of 7 in. (178 mm), providing space for
one

SRl10 and one SR109 Professional Mixer.

44.4

mm

(1-3/4 IN)

FIGURE

C.

OVERALL DIMENSIONS

No special precautions are required for ventilation.

The

SRl10 may be operated over a temperature range

of

-7" to 54°C (20" to 130°F) in continuous duty with-

out derating.
Power Supply

The

SR110 Professional Monitor Mixer is furnished
with a three-conductor power cable and three-prong
grounded plug (11). Connect the

SR110 to an outlet

which supplies 108 to 132 volts ac, 50/60

Hz

power.
The nominal power consumption at 120 volts under
normal operating conditions is 3 watts maximum (0.025
amperes at 120 volts). If extension cords are required
to supply power to the

SR110, a high-quality, 18-gauge

or larger cord should be used.

The

SRl10-2E is furnished with a three-conductor
line cord without a power plug. Obtain a suitable three­pin male power plug and attach it to the line cord. The
plug should be installed by qualified service personnel.

(Brown lead goes to "hot" or "live" terminal, blue lead

to neutral terminal, and

green/yellow lead to ground
or earth terminal.) Select proper operating voltage
(115V for 105-125V supply or 220V for 210-250V sup­ply) using the VOLTAGE SELECTOR Switch (14).

A POWER-OFF Switch located on the front-panel
MASTER Volume Control (3) controls the application
of ac power to the

SRl10, and a red indicator lamp

(2) indicates the power-on condition.
Functional Circuit Description

The inputs to the SRllO Professional Monitor Mixer
enter through the 11-pin

male connector located on

the cable (8) (see Figure D). The 11-pin female

con-

FIGURE D.

SR110 BLOCK DIAGRAM

INPUT

AND OUTPUT

\

/'

/

-24

08

HEADPHONES
TRANSFORMER

MASTER
VOLUME

CONTROL

-----C-

/

-1

DB

f

=

OUTPUT

TRANSFORMER

-

2

DB

MIX

RESISTOR

CHANNEL

I

DB

i

VOLUME -MIX

-

nector (9) is wired in parallel, and provides connection
for additional (tandem) SRllOs.

With the OUTPUT SELECTOR Switch (5) in the
MIXED INPUTS position, the input signals from the
individual channels of the

SR101 or SR109 go through

the individual channel Volume Controls

(I), a -1 dB
mixing amplifier, a -2 dB mixing resistor, and the
OUTPUT SELECTOR Switch before reaching the MAS­TER Volume Control

(3).

With the OUTPUT SELECTOR
Switch in the PROGRAM INPUT position, the program
input signal from the

SR101 or SR109 goes directly
through the OUTPUT SELECTOR Switch to the MAS­TER Volume Control. The MIX BUS Jack (10) is con­nected after the mixing resistor and before the OUT­PUT SELECTOR Switch. The MIX BUS Jack is for
parallel operation of two or more

SR101 or SR1091

SRIIO

combinations, providing 16 inputs with the OUT-

PUT SELECTOR Switch in the MIXED INPUTS position.

From the MASTER Volume Control

(3),

the signal
enters a +42 dB amplifier stage. The amplifier output
is fed to both line level (-1 dB) and headphone
(-24 dB) output transformers. The line level trans­former feeds a three-pin professional male audio con­nector

(7)

and two standard

1/4"

three-circuit (stereo)
phone jacks (6). The headphone transformer feeds a
standard

Y4

in. three-circuit (stereo) phone jack (4)
designed for use with 8 ohm stereo or monophonic
headphones.

Inputs and Outputs

All

SR110 inputs enter through the ACCESSORY IN­PUT AND OUTPUT 11-pin male connector (8). Pins 1
through 8 are the individual channel signals derived
from the eight

SR101 or SR109 channels (following the
equalizer circuits), pin 9 is a total program signal
(taken from the

SRlOl Monitor post link-pre link Switch

or

SR109 link input jack), pin 10 is the SR101 or SR109

+30 Vdc supply voltage and is not internally con-

nected to the

SR110 supply, and pin 11 is ground.

The ACCESSORY INPUT AND OUTPUT 11-pin fe-

male connector (9) is wired in parallel with the male

connector, and provides for connection of additional

(tandem)

SRll 0s.

The MONITOR OUTPUTSILINE LEVEL connectors
consists of one three-pin professional male audio con­nector

(7)

and two standard

VI

in. three-circuit (stereo)
phone jacks (6). These connectors provide three line
level, 600-ohm, balanced outputs to power amplifiers
or recording equipment.

The MIX BUS Phono Jack (10) provides a common

connection when two SRlOls or

SRIO9s and two or
more SRllOs are to be operated in a common mix
mode (16 channels). If more than two SRllOs are used
"Y" adapters can be used to connect the additional
MIX BUS Jacks.

The PHONES Jack

(4)

is a standard

1/4

in. three­circuit (stereo) phone jack designed for use with
8-ohm stereo or monophonic headphones.

Stage Monitor

To use the

SR110 as a stage monitor mixer (in con-

junction with the

SR101

or SR109), connect the AC­CESSORY INPUT AND OUTPUT male connector (8) to
the

SRlO1 or SR109 ACCESSORY OUTPUTIAUX LEVEL

female connector (see Figure

E).

Turn up the individual
channel Volume Controls (1) to be monitored on stage;
turn the remaining channel Volume Controls to

0 (off).

With the OUTPUT SELECTOR Switch in the MIXED IN-

TO

ACCESSORY

INPUT TO

STAGE

SRlOl CONSOLE

I

OR

/

I

4ii~

I

SR109

MIXER

FIGURE E.

STAGE MONITOR CONNECTIONS

PUTS position and the MONITOR OUTPUTS connected
to the stage monitor power amplifier input, a separate
mix of inputs can be provided for stage monitoring.
The

SRI10 monitors the SR101 or SR109 individual

channels after the

SR101 or SR109 channel input at-

tenuator, volume and equalizer controls.

With the OUTPUT SELECTOR Switch in the PRO-

GRAM INPUT position the stage monitor has the same

mix as the

SRlO1 or SR109. The program outputs of the

SR101 or Sf3109 are used for the "house" PA system.
Broadcast Line, House PA and Stage Monitor

If the

SR101 or SR109 is to be used to feed a broad­cast line for radio or TV audio, and separate house PA
and stage monitor systems are required, a number of
SRllOs may be connected as shown in Figure F. The
program output of the

SR101 or SR109 feeds the

broadcast line, the monitor output of the first

SR110
feeds a stage monitor power amplifier, and the monitor
output of the second (parallel-wired)

SR110 feeds the
house system power amplifier. Note that since the
ACCESSORY INPUT AND OUTPUT Connectors (8, 9)
of the

SR110 are in parallel, up to eight SRllOs may

be parallel-connected.

The individual channels that are not to be fed to the
stage monitor or house PA can be left off by turning
their Volume Controls (1) to

0 (off).

Stereo or Multi-Channel Tape Recording

A set-up similar to that described under Broadcast
Line

above can be used to record a stereo tape or for
stereo broadcasting. The monitor output from one
SR110 is connected to one input of the tape recorder
and the other

SR110 to the remaining input. This set-up
permits the user to select the desired mix on each
recording channel. For recording on more than two
channels, additional SRllOs can be added as desired.

16-Channel Mixer

For applications requiring the use of more than eight

channels, two SRlOls or

SRlO9s can provide a 16­channel mixing system by connecting their LINK OUT­PUT Jacks. Monitoring of all 16 channels can be ac­complished by connecting two SRllOs to the SRlOls
or

SRlO9s as shown in Figure

G.

The male ACCES-

MONITOR

TO STAGE

MONITOR

OUT

POWER

AMPLIFIER

FIGURE

F.

BROADCAST LINE CONNECTIONS