AUSTRALIAN MONITOR SA120 User manual

SA60, 60w Mixer Amplifier
SA120, 120w Mixer Amplifier
Operating Manual
21ON 159630+3dB
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CH 1 CH 2 CH 3 CH 4 CH 5 CH 6 BASS TREBLE MASTER
POWER
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SA60, 60w Mixer Amplifier
SA120, 120w Mixer Amplifier
ProductDescription
The SA60 is a 60 watt, 6 channel mixer amplifier and similarly the SA120 is a 120 watt, 6 channel mixer amplifier. Both
models operate from 230/240 VAC @ 50 Hz (or 115 VAC @ 60 Hz with factory modification) or 24 VDC via an external
battery supply. Both models can either be desk or rack mounted and are 2 standard rack units high. Rubber feet are
provided for table mounting but these should be removed if rack mounting is intended. Both amplifiers will deliver their
specified wattage into loads of 8 ohms (and 4 ohms on the SA120), 70 or 100 volt line. Both models feature six dual
purpose inputs, XLR balanced mic input and dual RCA aux/line level inputs. Channel 6 has a less sensitive aux/line level
input to enable it to accept a CD player or similar high level inputs. The SA series amplifiers feature output overload
protection, generous internal heat sinking and a strong steel chassis. A TRS (tip, ring, sleeve) insert point between the
mixerandamplifierstagesisalsoprovidedforeasyinsertionofagraphicEQ,compressororFBXFeedbackExterminator.
Front Panel Features
Dual Microphone/Line Level Controls
The6 dual mic/line input controls arelabelled Ch 1 through Ch 6and should be adjusted to providethe required mix level
for each individual channel. Start with the controls set to level 0 and turn the controls slowly clockwise until the desired
mix for each channel is obtained.
Bass Control
Setting this control in the centre “zero” position will give an overall flat bass response to the output of the amplifier.
Adjusting the bass control in a clockwise direction will provide up to +12 dB of bass boost @ 100 Hz. Adjusting the bass
control in a counter-clockwise direction will provide up to -12 dB of bass cut @ 100 Hz.
Treble Control
Setting this control in the centre “zero” position will give an overall flat treble response to the output of the amplifier.
Adjusting the treble control in a clockwise direction will provide up to +9 dB of treble boost @ 10 kHz. Adjusting the
treble control in a counter-clockwise direction will provide up -9 dB of treble cut at 10 kHz.
Master Output Control
This control adjusts the overall output level of the amplifier depending on the levels set for the individual input mix
channels as detailed above. Start with the control level set to level 0 and slowly turn the control clockwise until the
desired output level of the amplifier is reached.
Power Switch
This switch controls the switching of the AC power to the amplifier. Rocking this switch upwards turns on AC power
tothe amplifier while rocking the switch downwards turns power offtothe amplifier. Whenintheupward “On” position,
theblueLEDwithin the LED VU Display Meter will glow.
21ON 159630+3dB
555555 00 5
CH 1 CH 2 CH 3 CH 4 CH 5 CH 6 BASS TREBLE MASTER
POWER
444444 11 4
333333 22 3
222222 33 2
111111 44 1
0
0
0
0
0
0
0
10 10 10 10 10 10 55 10
999999 44 9
888888 33 8
777777 22 7
666666 11 6

RearPanel Connections
AC Power Inlet
The 3 pin IEC power inlet is located on the bottom left of the rear panel and accepts a standard mains power lead fitted
with an IEC connector. Before plugging in a power lead, please check the rear panel of the amplifier to ensure that the
voltage label shows the correct AC operating voltage for your part of the world.
The inlet is equipped with an in-built AC fuse holder fitted with a slow blow fuse plus a spare fuse. Please ensure that
themainspowercordisdisconnectedbeforeattemptingtocheckorreplacethisfuse.
Speaker Output Terminal Strip
Located on the top left of the rear panel is the speaker output terminal strip. Reading from left to right, the connections
are: COM Common or “-” for low impedance speaker loads (4 or 8 ohms).
4The “+” for 4 ohm speaker loads (use with common) 4 ohm not available on SA60
8The “+” for 8 ohm speaker loads (use with common)
COM Commonor“-”for70vor100vloads(maximum100vloadof80ohmsforSA120,170ohmsforSA60)
70 The “+” for 70v line speaker loads (use with common)
100 The “+” for 100v line speaker loads (use with common)
Please ensure that the correct “Common” is used. Low impedance and 70/100v loads can be used simultaneously but
please pay careful attention to the overall speaker load. When used individually, the low impedance load should be 4
ohms or higher on the SA120 (8 ohms or higher on the SA60) while the 100v line load should not fall below 80 ohms for
the SA120 or 170 ohms for the SA60. When both outputs are used simultanously, ensure that neither output is loaded
tomaximum.
24 Volt DC Power Source Connection
Two post style terminals allow for the connection of an external 24 VDC battery for applications where PA system
operation is critical. The red terminal post is for connection to the positive (+) terminal. The black terminal post is for
connection to the negative (-) terminal. A trickle charge circuit provides a maximum 300mV automatically to a stand-by
battery connected to the 24 VDC input (trickle charge on SA120 only).
DC Fuse Holder
Remove with a screwdriver if access is required. The DC fuse rating is 10 Amps Slow Blow for the SA120 and 5 Amps
SlowBlowfortheSA60.
LED Display VU Meter
An8segment LED VU meter is provided for the master output.The VU meters indicate output signal level from -21 to+3
dB.For normal operation the LED’s should rarely oscillate in the red zone. If the LED’s in the red zoneare lit continually,
then the output level controls should be turned counter-clockwise to reduce the output level. Too much output level can
cause signal distortion. The far left blue LED on the VU meter is for indication that AC power is switched ON to the unit.
MIC 6LINE OUT
INSERT
24VDC
DC FUSE
AC FUSE
MIC 5 MIC 4 MIC 3 MIC 2 MIC 1
ENGINEERED BY AUDIO TELEX C OMM UNICATION S PTY LTD SYDNEY AUSTRALIA
TAPE OUT LINE 6 LINE 5 LINE 4 LINE 3 LINE 2 LINE 1
RCA
SIGNAL
GROUND
1 = Ground
2= + Signal
3 = - Signal
XLR
DC 10A S/B DC 5A S/B
AC 5A S/B AC 2A S/B
SA120-4 SA60-3
FUSES
230 V
240 V
OHM
COM 4 8 COM 70V 100V
LINE

Tape Output
TwoRCA style output connectorsare provided for a line level tape output. A maximum level of 350mV into 10K ohms is
provided which is ideal for a connection to most standard tape recorders. This output is sourced before the master gain
control and as such, the tape output level is not influenced by the operation of the master gain control.
Line Output
A male XLR, balanced transformer isolated output is provided to connect to additional power amplifiers. A maximum
outputlevel of 700mV makes it suitable fordriving most power amplifiers or similar devices. Pin connections are Pin 1 =
Earth. Pin 2 = Active Positive (+). Pin 3 = Active Negative (-).
Line Inputs
Six pairs of RCA input connectors accept unbalanced line or auxiliary inputs for channels 1 through 6. The pairs are
provided per channel to allow simple connection of stereo program sources which are summed to mono once connected.
Channel 6 accepts higher level inputs such as a CD player or DVD player. For best gain structure, always connect high
level program sources to input 6.
Microphone Inputs
Six female XLR accept 200 ohm balanced or unbalanced microphone inputs. Pin connections are Pin 1 = Earth. Pin 2 =
Active Positive (+). Pin 3 = Active Negative (-). If using unbalanced microphones, ensure that phantom power (see
below) is switched off, otherwise damage to the microphones is possible.
Phantom Power
18 Volts DC phantom power is provided for all microphone inputs. An internal on/off switch can be found on the circuit
board PCB6177. The factory setting is for phantom power to be switched on so this switch can be used to disconnect
phantompower (from all six inputs) ifrequired. !Itis necessary todisconnectthepowercordand remove thelidfrom
theamplifier before operating this switch.
Tone Generator
Four separate tones are available on the optional ATC5488 tone generator board. This internally mounted PCB is easily
fitted and plugs directly into a socket provided on the internal circuit board PCB6178. Please follow the instructions
supplied with the tone generator. When any tone from the ATC5488 is activated, all inputs, except for input 1, will
automaticallymute.
Tones available on the ATC5488 tone generator board are:
EvacuationTone(to Australian Standard AS2220.1.2)
AlertTone (to AustralianStandard AS2220.1.2)
BellTone
PreAnnounce Chime
Muting Modules
Two separate VOX muting modules are available for the SA series amplifiers. They can be easily fitted by a qualified
installer or technican. The modules plug directly into a socket provided on the internal circuit board PCB6178. The two
muting modules are:
TX3014 - Provides two levels of muting with the main priority for input one, which mutes all other inputs and
secondary priority for channel two, which mutes all inputs except for input one.
TX3010 - Provides single muting from channel one only. When activated from signal on input one, all other channels
are muted.
Insert Point
A TRS jack socket insert point (6.35mm) is provided which enables a graphic equaliser, FBX Feedback Exterminator or
similar product to be connected between the mixer and power amp stages. Tip = Return. Ring = Send. Sleeve = Ground.

1.Savethecartonandpackingmaterialeveniftheequip-
ment has arrived in good condition. Should you ever
need to ship the unit, use only the original factory pack-
ing.
2.Readalldocumentationbeforeoperatingyourequip-
ment.Retain all documentation for future reference.
3. Follow all instructions printed on unit chassis for
proper operation.
4.Donotspillwateror otherliquidsintoorontheunit,
or operate the unit while standing in liquid.
5. Makesure power outletsconform to the power re-
quirements listed on the back of the unit.
6. Do not use the unit if the electrical power cord is
frayed or broken. The power supply cords should be
routed so that they are not likely to be walked on or
pinched by items placed upon or against them, paying
particular attention to cords and plugs, convenience re-
ceptacles, and the point where they exit from the
appliance.
7. Always operate the unit with the AC ground wire
connected to the electrical system ground. Precautions
should be taken so that the means of grounding of a
piece of equipment is not defeated.
8.Mainsvoltagemustbe correct and the sameasthat
printed on the rear of the unit. Damage caused by
connection to improper AC voltage is not covered by
any warranty.
9.Havegaincontrolsonamplifiersturneddownduring
power-up to prevent speaker damage if there are high
signal levels at the inputs.
10.Powerdown&disconnectunitsfrommainsvoltage
beforemaking connections.
11.Neverholda powerswitchin the“ON”position ifit
won’tstaythereitself!
12.Donot use theunit near stoves,heat registers, ra-
diators,or otherheatproducingdevices.
13. Donotblock fan intake or exhaustports.Do not
operate equipment on a surface or in an environment
which may impede the normal flow of air around the
unit, such as a bed, rug, weathersheet, carpet, or com-
pletelyenclosed rack. If the unit is used in anextremely
dusty or smoky environment, the unit should be peri-
odically “blown free” of foreign matter.
14. Donot removethe cover.Removingthecover will
expose you to potentially dangerous voltages. There
are no user serviceable parts inside.
15.Donotdrivethe inputswithasignallevel greater
thanthatrequiredtodriveequipmenttofulloutput.
16. Donotconnecttheinputs/outputsofamplifiers
or consoles to any other voltage source, such as a
battery, mains source, or power supply, regardless of
whether the amplifier or console is turned on or off.
17. Donot runthe output of any amplifier channel
backintoanotherchannel’sinput.Donotparallel-or
series-connect an amplifier output with any other
amplifieroutput.
Audio Telex Communications Pty Ltd is not respon-
sible for damage to loudspeakers for any reason.
18. Donot ground any red (“hot”)terminal. Never
connecta“hot”(red)outputto groundortoanother
“hot”(red)output!
19. Non-use periods. The power cord of equipment
should be unplugged from the outlet when left un-
used for a long period of time.
20.ServiceInformationEquipment shouldbeserviced
by qualified service personnel when:
A. The power supply cord or the plug has been
damaged.
B. Objects have fallen, or liquid has been spilled into
the equipment
C. The equipment has been exposed to rain
D.Theequipmentdoesnotappeartooperate normally,
or exhibits a marked change in performance
E. The equipment has been dropped, or the enclosure
damaged.
Important Safety Information

Engineered by Audio Telex Communications Pty Ltd, Sydney, Australia
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