AUDIO TELEX SA120-4 User manual

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sA120-4
Mixer Amplifiers
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Audio Telex Communications Pty Ltd
ACN 001345482 lncorporated ln NSW
NSW & ACT QLD & NT vlc
149 Beaconsfleld Street
Private Bag 149
Sllvenrater NSW 2128
Australla
Ph 02 96r'7 1411
Fax [phone]
42 CommerclalRoad
PO Box 871
Fortitude Valley QLD 4006
Ph 07 3852 1312
Fax [phone]
22127 7 M lddleborough Road
Box HillVlC 3128
PO Box 151
Blackburn South VIC 3130
Ph 03 98907477
Fax [phone]
WA SA TAS
7164-66 Kent Street
PO Box 489
Cannington WA 6107
Ph 08 9356 2761
Fax [phone]
Electronlc Concepts Pty Ltd
76 George Street
Thebarton SA 5031
PO Box 7034 Hutt Street
Adelalde SA 5000
Ph 08 82349444
Fax [phone]'/1
K W McCulloch Pty Ltd
54a Albert Road
iloonahTAs 7009
Ph 03 6228 6373
Fax [phone]
New Zealand
Unlt B,11 Plermark Drive
PO Box 512
Albany NZ 1331
Ph 09 4159426
Fax [phone]

5A60-3 Mixer Amplifier
SAI 2O-4 Mixer Amplifier
Product DescripUon
The 5460-3 is a 60 watt, 6 channel mixer amplifier and similarly the SAl20-4 is a 120 uatt, 6 channel mixer amplifier. Both
models op€rate fim 240 VAC @ 50 Hz (r I l0 VAC @ 60llzwith factory modification) u 24 VDC via an efiernal bottery supply
and both can either be desk or rack momted. Bo{h are 2 standard rack units high and standard rack width of 482mm, fu table
mounting rubber feet are sryplied but these should be removed if rack mounting is intended. Both amplifiers will deliva their
sp€cified wattage into loads of 4 or 8 ohms, 70 m 100 volt line. Both models feature six dual purpose inputs, )(LR balanced mic
input and dual RCA aux/line level inprrts. Channel 6 only has a higher level aux/line lerrcl input to enable it to accept a CD player
m similar high lwel inpr$s. The SA series f€ature outprs overload protec'tim, a TRS insert point betrreen the mixer and amplifier
stages fm easy insertior of a graphic EQ, fBX Feedback Exterminator or similar, internal heat sinking and a strmg steel chassis.
Front Panel Controls
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Du{ ticrophonelline Gain Controls! The 6 dual mic/line input controls are marked Ch I througlr Ch 6 and
shanld be adjuSed to provide the required mix level ftr each individual channel. Start with the controls set to level 0 and turn
the cryrtrols slowty clockwise until the desirod mix for eadr channel is ohained.
Bass Tonal Control: Setting this csrfol in the cenfe "zero" pcition will give an overall flat bass response to the
otttput of the amplifier. A-dju$ing the bass control in a clockwise direction will provide up to +12 dB of bass boost @ 100 tlz.
Adjusting the hss cmtrol in a cormter-clockwise direction will provide up to -12 dB of hss ctft @ lO0IIz.
Treble Tonal GontrOl: Setting this control in the ce,ntro "z6d' positior will give an overall flat treble respmse to the
output of the amplifier. Adjusting the treble control in a clockwise direction will provide up to +9 dB of treble boosf @ l0 klft.
Adjusting the beble cmtrol in a cotmter-clockwise directiod will provide up -9 dB of treble cut at l0 ktlz.
llaster Output Control: This cmtrol adjusts the overall output level of the amplific depending m the levels set for
the individual input mix channels as detailcd above. Staxt with the control level set to level 0 and slowly turn the control
clmkwise until fie desired ortput lernel ofthe amplifier is reached.
POWef SWitCh: This switch contols the switctring of the AC power to the amplifier. Rocking ttris switch trpwards turns
on AC power to the amplifier while rocking the witch dovmwards turns power offto the amplifier. When in the upunard "On'
position, the red nesr in the body of the switch will gloril.
LED Display VU ileter: Marked in decibel graduations frm -21 dB to +3 dB, the light enitting diodea will indicate
ths vslrrme level at the output of the arnplifier. Fu ncmal operation the LED's glow green * *t"y modulate with the output
level of the amplifier. If the lights are consistently indicating red the amplifier is being overdriven, resulting in distontior in the
qualrty of the audio sigrral.
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5.

Rear Panel Connections
t. 3 Pin IEC AC ilains PoWer lnlet The operating voltage is 240 VAC @ 50 ttzor n0 VAC @ 60 ttz. The AC
power voltage is not externally user adjustable but is factory preset. The inlet is equipped with an inbuilt AC ftse holder fitted
with a 4 amp slow blow fuse plus one spare. Power consumption is 350 watts. I Phase ensure that the mains power cord is
disconnected before attempting to check or replace this frse.
z. Direct Output Connections: These screw tenninals allow access to the direct outputs of the amplifier. 2 spare
screw terminals allou' for the connection of various tone module accessories. Reading from left to right the terminals are.
o Lowlmpedance Cmmon
o 4 Ohms
o 8 Ohms
r Con$ant Voltage Comnm
o 70 Volt Line
r 100 Volt Line
. Spare
' SPare
Note: The minimum impedance level at any timc on maximum load fc 100 Volt line should be no less than 80 Ohms fm the
SAl20 and no le.ss than 170 Ohms fm the 5.{60.
3. 24 Volts DC Power Source Connection: Two pst style terminals atlow for the connection of an ortemal 24
VDC battery for applicaticrs where PA system operation is imperative. The red terminal post is for cmnectisr to the positive
(+) tominal. The black terminal pct is for connection to the negative (-) terminal. A trickle charge circuit provides a
maximum 300mV autmatically to a stand-by battery connected to the 24 VDC input on the SAl20 only.
4' DC Fuse Holder: Remove with a screwdriver if access is required. DC fuse rating is 10 Amps Slow Blow fc the SAl20
and 5 Amps Slow Blorv fo the 5,{60.
S. lnSeft TRS phmo socket insert point (6.5mm). Enables a graphic equaliser, FBX Feedback Exterminator or similar product
to be connected' Ilnbalanced insertion, bneaks normal connection between the pr+amp and power amp stages of the amplifier.
Tip = Return. Ring = Send. Sleeve: Grormd.
O' Tape Output 2 x RCA style phuro cnrtput cmnectu fon line level output. hovides a maximrn of 350mV into 10K
Ohms, ideal fu a connection to most standard tape recuders. This output is sonced before the mast€r gain comtol and as such,
the tape output level is not influenced by the operation of the master gain cmfrol.
Z. Line OUtpUt Male )(LR style balanced transformer isolated output fm connection to additional power amplifiers.
hovides a maximum of 700mV Suitable for driving power amplifiers or similar devices. Pin connections are pin I : Earth.
Pin 2 : Active Positive (+). Pin 3 : Active Negative O.
S- Line lnpUtS: Note: AII inputs lre universet line / microphone inpub. Bot'h connectors cen not be utitised for rny one
input Six pairs of RCA style phoro input connectors acc€pt rmbalanced line or auxiliary inputs for charnels I through 6.
Channel 6 accepts higher level inputs such as a CD player.
l. ilicrophOne lnpUts: Note: All inputs are universat line / microphone inputs Bott connectors cen not be utilised
for any one input Six ferrale XLR inputs acc€pt 200 Ohrn balanced or unbalanced microphone inputs. Pin connec*ions are pin
I = Earth. Pmz: Active Positive (+). Pin 3 : Active Negative C).
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Special Facilities
Phantom PoWer: Normally supplied to each of the six XLR microphure inputs. Provides 18 Volts DC. An internal on/off
slide switch can be fomd on the internal circuit board PCB6I77 to disconnect phantm power from all six inputs g It is
neces$ry to disconnect the power cord end remove the lid from the amplificr beforc opcreting this switch.
Umlting: The SA series of amplifiers are equip'ped with a "soft knee limitet'', wtrich prctects the emplifier fim overload c
short circuits. ln sme cases it may be necessary to disconnect the limiter to obtain higlrer than rated rxrlver. This can be achieved
by re,noving a link sr PCB6I79. Perfuming this procedure can void any warranty claim. I It is necessary to disconnect the
trxlwer cord end remove the lid from thc amplifier before attempting this procedure.
Optional Accessories
g The instellation of mme of the following optionel aceessories involves rccess to the inside of thc amplifier. Instaltation
should only be attcmpted by r qurlified technicien. Always turn off the AC Flwer rnd remove the AC Fwer cord beforc
attempting to sccoss the inside of the emplifier. Pleese contlet your nearest Audio Tclex of;fice for details of your neerest
quelificd technician.
TOne GenefatOfS: Forn separate tmes are available as an optiol via the ATC5488 ture generatc board. This internally
mounted PCB is easily fitted and plugs directly into a socka prwided on the internal circuit board PCB6I78. Please follow the
instructions zupplied with the tone generatm. When any tme from the ATC5488 PCB is activated all inputs will autmatically
mute exept fm input ore.
Tsres available m the ATC5488 tsre generatr board are:
Evacuatim Tore (to Ausralian Standard A32220.1.2)
Alert Tone (to Australian Standard A5222A.1.2)
Bell Tme
heAnnotmce Chime
Voice Opefated tuting llodules: Two separate models are available for the SA series amplifiers. They are easily
fiued internally. Bdh plug directly into a socke provided on the internal circuit board PCB6I78.
The models are:
TX3014 Mtfing Module with Priority- Provides two levels of muting with priuity for channel one, wtrich mutes all odrer inputs
and scmdry primity for channel two, wlrich mutes all other inputs except for channel one.
TX30l0 Muting Module- Provides single muting from channel ure only. When activated all other channsls are muted.
Fuse Sizes SA120 Amplifier
tains 240 VAC: 5 Amperes SlowBlow
DC: l0Amperes SlowBlow
Fuse Sizes SA60 Amplifier
Ilains 240 VAG: 2 Amperes SlowBlow
DG: S Amperes SlowBlow