AUDIO TELEX ACM60 Operating Instructions Manual
- Category
- Musical Equipment
- Type
- Operating Instructions Manual
This manual is also suitable for
AUDIO TELEX ACM60 is a mixer amplifier designed for commercial installations, featuring 4 microphone/line inputs, individual channel controls, master output control, and a 6-zone 100-volt speaker selector with all-call. It delivers 60 watts into 8 ohms, 70 or 100-volt line. With bass and treble controls, a built-in 4-tone generator, and VOX muting, it's ideal for applications like paging, background music, and public address systems.
AUDIO TELEX ACM60 is a mixer amplifier designed for commercial installations, featuring 4 microphone/line inputs, individual channel controls, master output control, and a 6-zone 100-volt speaker selector with all-call. It delivers 60 watts into 8 ohms, 70 or 100-volt line. With bass and treble controls, a built-in 4-tone generator, and VOX muting, it's ideal for applications like paging, background music, and public address systems.
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Audio Telex Communications Pty Ltd
ACN 001345482 lncorporated in NSW
NSW & ACT QLD & NT vrc
149 Beaconsfield Street
Private Bag 149
Silverwater NSW 2128
Australia
Ph 02 9647 1411
Fax029648 3698
42 CommercialRoad
PO Box 871
Fortitude Valley QLD 4006
Ph 07 38521312
Fax 07 32521237
221277 Middleborough Road
Box HillVlC 3128
PO Box 151
Blackburn South VIC 3130
Ph 03 98907477
Fax 03 9890 7977
WA SA TAS
299 Fitzgerald Street
West Perth WA 6005
PO Box 404
North Perth WA 6906
Ph 08 92284222
Fax 08 92284233
Electronic Concepts Pty Ltd
76 George Street
Thebarton SA 5031
PO Box 7034 Hutt Street
Adelaide SA 5000
Ph 08 82349444
Fax 08 823494/-1
K W McOulloch Pty Ltd
54a Albert Road
MoonahTAS 7009
Ph 03 62286373
Fax 03 6278 1063
New Zealand
Unit B, 11 Piermark Drive
PO Box 512
Albany NZ 1331
Ph 09 4159426
Fax 09 415 9864
ACM60 Mixer Amplifier
ACM120 Mixer Amplifier
Product Description
The ACM60 and ACMI2O mixer amplifiers are designed for commercial installations. Both models operate on240 VAC, 50Hz (or
110 VAC,60Hz with factory modification) and may be desk or rack mounted via an optional rack mount kit. Both amplifiers
incorporate a 6 zone 100 volt line speaker zone selector with all call. The ACM60 will deliver 60 watts into a load of 8 ohms, 70 or
100 volt line. The ACM120 will deliver 120 watts into a load of 4 or 8 ohms, 70 or 100 volt line. As standard, both models are self
standing and come with rubber feet. They may be stacked to a maximum of four units high.
Front Panel Controls
MUD-IOMET ACMI20
(ACM120 shown. The ACM60 has identical front panel features)
Dual Microphone/Line Gain Controls: The 4 dual mic/line input controls are labelled ch I through to Ch 4 and should
be adjusted to provide the required level mix for each individual channel. Start with the controls set to level 0 and tum the controls
clockwise until the desired mix level for each channel is reached.
BaSS COntfOl: Setting this control in the centre position will give an overall flat bass response. 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.
Tfeble GOntfOl: Setting this control in the centre position will give an overall flat treble response. Adjusting the treble control
in a clockwise direction will provide up to 9 dB of treble boost @ 10kHz. Adjusting the treble control in a counter-clockwise
direction will provide up to -9 dB of treble cut @ l0kJtz.
Master Output Control: This controls the overall output level of the amplifier depending on the levels set for rhe individual
input channels as detailed above. Start with the control set to level 0 and tum clockwise until the desired output level of the amplifier
is reached.
Page Chime Button: This allows the user to disable or enable the Pre-Announce Chime. This switch does not however
activate the chime. Activation is accomplished via the rear panel barrier strip (normally wired to a paging microphone). If the pre-
announce chime is connected to a paging microphone (meaning that it would be activated by the switch on the microphone), the Page
Chime switch on the front panel of the amplifier allows the user to disable the chime function for those occasions when it is not
wanted.
All Call BUttOn: When pressed, the All Call button will connect the 100 volt output of the amplifier to all 6 of the switched
outputs. Depressing this button again will disconnect the switched outputs. This switch is "push on-push off'and is non-interlocking.
Speaker Selector Switchesl These 6 black buttons are for switching the 100 volt output of the amplifier to any
combination of the 6 available speaker zones. The switches are o'push on-push off' and are non-interlocking (both with each other and
with the all-call button). The maximum capacity of each speaker zone is 60 watts so care should be taken to ensure that no individual
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zone is loaded down with any more than 60 watts, always remembering that the total load for the ACM60 is 60 watts and for the
ACMI2O, 120 watts in total. Eg; It is possible on the ACM120, for example, to safely have one zone loaded with 60 watts and the
remaining five loaded with 12 watts each.
POWef BUttOn: This switch controls the switching of AC power to the amplifier. Rocking this switch upwards turns on AC
power to the amplifier while rocking the switch downwards turns power off to the amplifier. A red LED to the left on the switch will
indicate whether the amplifier is switched on or off.
Rear Panel Connections
AC FUSE
acM 60 2as8
Ail r20 4A 58
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(ACM120 shown. The ACM60 does not have a 4 ohm output)
3 Pin IEC Mains Power lnlet Theoperatingvoltageis240VAC @50Hzor ll0 vAC@60H2. TheACpowervottage
is factory set and not externally user adjustable. The inlet is equipped with an inbuilt AC fuse holder fitted with a 4 amp fuse
(ACMI20) or a 2 amp fuse (ACM60) plus a spare within the holder. Power consumption is 125 watts for the ACM60 and 250 watts
the ACMI20.
Please ensure that the mains power cord is disconnected before attempting to check or replace this fuse.
Direct OUtput Terminal Strip: The screw terminals on the left hand side of the strip allow access to the direct speaker
outputs of the amplifier. The screw terminals on the right hand side are for activation of the in-built 4 tone generator. Reading from
left to right the terminals are:
o Low Impedance Common (use with 4 or 8 ohms)
o 4 Ohms (not available on ACM60)
o 8 Ohms
r Constant Voltage Common (use with 70v or l00v)
t 70 Volt Line
r 100 Volt Line
' Spare
o Tone Generator Common (use with one of the 4 tones listed below)
r Pre-Announce Chime
r Alert Tone
. Bell Chime
o Evacuation Tone
Note: The minimum impedance (or maximum load) at 100 Volt line should be no less than 80 Ohms for the ACMI2O and no less
than 160 Ohms for the ACM60.
Switched Outputs Terminal Strip: Reading from left to right, these screw terminal pairs correspond to the switched 100
volt line outputs and are numbered 6 through I as indicated on the front panel of the amplifier. For each pair, the left hand terminal is
the 100 volt output and the right hand terminal is the common.
Phantom Power Button: This button enables or disables the 18 volts DC phantom power which is available on all
microphone inputs (XLR's). The "in" position indicates that phantom power is on for all mics. The "out" position means that phantom
power is switched offfor all mics. Phantom power is required for electret condenser microphones which require DC power to operate.
While some of these microphones can operate from an internal battery, having phantom power available on the amplifier eliminates
the need to regularly change batteries in the microphone. While phantom power is not required for the more common Dynamic
microphones, it will not damage them providing that they are balanced. Do not plug an unbalanced microphone in any amplifier or
mixer when phantom power is switched on.
Line OUtpUt The balanced XLR line level output provides a maximum of 700mV to allow for connection to up to 6 power
amplifiers. Simply run a balanced cable from the line out of the ACM60 or ACM120 to the line input of the power amplifier. Pin
connections are: pin #l-earth; pin #2-signal (high, +); pin #3-signal (low, -).
Tape Output RCA style phono output connectors provide a line level output with a maximum of 350mV into 10K Ohms 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.
Active Balanced, XLR Sockets For The Microphone lnputs. The mic input sensitivity is lmv @ 200 ohms.
Pin connections are: pin #l-earth; pin #2-signal (high, +); pin #3-signal (low, -). Phantom power of +18 volts is available on all
microphone inputs. Reading from left to right across the rear panel, the connection are for microphone inputs 4, 3,2, & 1 respectively.
RCA Sockets For The Monaural Line Level lnputs. Line inputs 1,2 &3 have an input sensitivity of 75mv @47K
ohms. lnput 4 has an input sensitivity of 300mV @ 47K ohms making it suitable for high level inputs such as a CD player. Reading
from left to right across the rear panel, the connections are for inputs 4, 3,2, & 1 respectively.
Other Features
TOng GenefatOfS: Four separate tones are available from the in-built tone generator board. All four tones can be activated
individually via a contact closure cormected to the screw terminals on the rear of the amplifier. To activate the bell chime for example,
just run a pair of wires from the Tone generator common and the Bell terminal to an external switch. Activating the switch, or closing
the pair of wires, will activate the bell. When any tone is activated, all inputs (except for inputs one and two) will automatically mute.
To adjust the level of the tone generator, disconnect the power lead, remove the amplifier lid and locate the pot labeled R6. (located
behind the Bass adjustment pot). This pot adjusts the level for all 4 tones.
Tones available on the ACM60 and ACMI2O include:
o Evacuation Tone (to Australian Standard A52220.1.2)
o Alert Tone (to Australian Standard A52220.1.2)
o Bell Tone
r Pre Announce Chime
MUting: A VOX muting card is installed in the ACM60 and ACM120. This feature provides automatic muting of some channels
when others are active. It is normally used so that a paging microphone can have priority (by muting) over background music. VOX
muting is available from channels 1 and 2 meaning that any signal on channels I and 2 (mic or line) will mute charnels 3 & 4. The
muted channels will automatically ramp back up to normal volume when the signal on channels 1 and/or 2 is no longer active. The
amplifier ships with the VOX muting function enabled. To disable the VOX muting, disconnect the mains power lead and remove
the lid of the amplifier. Looking down from the front of the amplifier, a three position jumper (labeled JP2) is located just to the left
and behind the level pot for channel L To disable VOX muting, move the jumper to the middle and left pins. (Factory setting for VOX
enabled is the jumper on the middle and right pins).
Accessories:
Fuse Sizes: ACMRK: 19" rack mount kit
Mains ACM120,240 VAC: 4 Amperes Slow Blow
Mains ACM60, 240 VAC: 2 Amperes Slow Blow
Notes
The DC fuse is located on the circuit board. This is a feature of the ACM series amplifiers, which is equipped with a current limiting
circuit preventing excessive DC currents, thus eliminating the risk of blowing high tension fuses. In the unlikely event that the DC
fuse actuates, the output transistors should be checked, as it is probable that the amplifier has been subjected to very extreme
conditions.
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Date: 16-Oct-2002 Sheet of
File: C:\Protel Files\CDTRAX\CD6235-1.DDB Drawn By:
C32
4u7
D1
C31
4u7 C30
4u7 IC3B
LM1458
C29
4u7
C28
4u7
C27
4u7 IC3A
LM1458
R37
100R
R36
47K
R35
47K
R34
1K
R33
1K
R32
10K
R31
10K
L
C26
4u7 C25
4u7
R
LINE4
LINE3
LINE2
LINE1
C24
4u7
C23
4u7
C22
4u7
C21
4u7
C20
150P
C19
150P
C18
150P
C17
150P
C16
4u7
C15
4u7
C14
4u7
C13
4u7
C12
4u7
C11
4u7
C10
4u7
C9
4u7
C8
150P
C7
150P
C6
150P
C5
150P
C4
4u7
C3
4u7
C2
4u7
C1
4u7
R22
680R
R21
680R
R20
22K
R19
22K
R18
22K
R12
22K
R4
220K
R17
47K
R16
680R
R15
680R
R14
680R
R13
680R
R11
47K
R10
22K
R9
22K
R6
22K
R5
22K
R3
47K
R2
680R
R1
680R
IC2B
LM1458
IC2A
LM1458
IC1B
LM1458
IC1A
LM1458
1XLR
2XLR
3XLR
4XLR
R7
4K7 R8
4K7
R23
4K7 R24
4K7
R25
4K7 R26
4K7
R27
0R
R28
0R
R29
4k7 R30
4k7
CD6235-1
ACM120/60 MIC INPUT
MIX OUT
MIX OUT
3
21
OUTPUT
PHANTOM
SW1
TAPE OUT
X1/1
(CD)
CH 4 OUT
CH 3 OUT
CH 2 OUT
CH 1 OUT
GRD
TAPE OUT
AG(1/2 VCC)
+VCC
+15V
8
8
5
67
4
3
21
5
67
4
3
21
RS
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Date: 16-Oct-2002 Sheet of
File: C:\Protel Files\CDTRAX\CD6236-1.DDB Drawn By:
R37
2k2
R51
10K
C24
.1u C23
4u7
C22
.1u
R50
47K
C21
4u7
D12
R45
47K
D10
C10
2u2
C9
10u
V2 BC546
R15
4K7
R14
3K9
R13
4K7
R9
100K
R6
10K
C3
2u2
R4
33K C1
2u2
C26
.47u
R7
10k
R8
10k
R23
10k
R25
50K
R26
50K
R27
50K
R28
50K
R29
10k
R30
10k
C25
4u7
IC3A
LM1458
IC3B
LM1458
R31
100k
R32
1K
R33
100R
R34
10K R35
10K
R36
10K
C27
33p R38
50K
R39
50K
C28
.03u
C29
1200P
R41
6K8 R42
6K8
R44
1K
R24
10k
C38
4u7
C52
470u
C6
4u7
C39
470u
IC2
7818
R40
50K
IC5A
IC5B
1
2
3
5
6
7
8
4
9
10
11
12
14
15
16
13
IC6A
NE570
R46
6K8
R47
1K
R48
22R
D1
D2
C32
10U
R49
100R
VCC
VCC
VCC
R54 2M2
C33 2u2
R56 100K
R57
82K
R58100K
C34 C35
2u2
C36
2u2 R52
1K
R59
1K
1
2
3
4
5
6
7
8
910
11
12
13
14
15
16
17
18
IC7
16C54
IC8
M5222
R60
R61
R65R66
C37
2u2
R67R68R69R70R71
S1
C41
22P
C42
22P
XT1
VDD
D6
D7
D8
R72 1K8
R73 220R
R74
100R
R75
100k C43
.47u C45
.47u
C47
22u
IC9
7805
C48
10u
VCC
VDD
VCC
VCC
IC1A
1458
IC1B
1458
IC4
M5222
R1
10K
R2
100k
R3
10K
R111M
R12
47k R17
100k
D5
D9
C4
4u7 C5
4u7
C8
4u7
C13
47u
C14 33p
C1533p
C16
4u7
VCC
D4
R10
470R
R18
1K
R19
1K
R21
120k
R22
100k
VCC
R43
1M
C20
.1u
D3
IC10A
LM358a
R16
100k
R20
15k
R53
4k7
VCCR55
10k
V1
BC546
R5
2k2
R62
47k
R63
47k
IC10B
LM358b
VCC
C2
4u7
8
543
21
C
CHIME
X2/6
X2/5
X2/4
X2/3
X2/2
X2/1
18VDC
1
35VDC
AG(1/2VCC)
9X 10K
CH4
CH2
CH3
CH1
LM358
LM358
AG
AG
AG(1/2VCC)
TAPE OUT
1
2
3
4
8
7
6
5
RS
POWER AMP
X1/1
X4/2
EVAC
BELL
ALERT
AG
AG
JP1
JP2
1
ACM120/60 MIXER
ON
POWER AMP
POWER AMP
LINE OUT
X1/9
X1/10
CD6236-1
5VDC
TUNER/CASSETTE
(ACM120R/RC)
TO MON AMP
(ACM120R/RC)
1
2
3
4
5
8
1
2
3
4
5
6
7
8
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Title
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Date: 2-Sep-2002 Sheet of
File: C:\Protel Files\CDTRAX\CD6234-1.DDB Drawn By:
C33
.1u
R34
47R
V12
TIP35C
V11
TIP35C
V10
TIP36C
V9
TIP36C
R33
.15R
R32
.15R
R29
.15R
R28
.15R
R27
100R
R16 100R T1
C27 22P
C26 22P
C25
2200uF
C24
.1u
C23
150p
C22
150P
C21
150P
C20 150p
C19 150p
V4
TIP42
V3
TIP42
V2
TIP41
V1
TIP41
C18
1200p
C17
150P
C16
150P
C15
150p
C14
2200uF
C13
.1u
C12
150p
C9
2u2
C8
.47u
C7
.47u
C6
10u
C5
10u
C4
150p
C3
22uF
C2
22uF
C1
1200p
R25
.15R
R24
.15R
R23
.15R
R22
.15R
R21
22K
R2022K
R19
100R
R18
1k
R17
1k
R26 100R
R15 100R
R14 1k
R13
1k
R12
100R
R11
22K
R10
1K
R9
560R
R8
22K
R7
10K
R6
100K R5
2K7
R4
2K7
R3
1K
R2
560R
R1
22k
17
18
19
4
14
13
12
7
11
1
10
6
16
20
2
9
15
8
3
5
IC1
TDA7250
T2
C28
2200u
C29
2200u
C30
4u7
C31
4u7
S1
F1
F2
F3
BR1
N1
C11
.1uF
C10
.1uF
V5
TIP36C
V6
TIP36C
V7
TIP35C
V8
TIP35C
R37
100R
R38
100R
R31
100R
R30
100R
C32
.1u
D1
R35
22K
R36
22K
R39
150K C34
22u
4AMP SB
5AMP SB
5AMP SB
11
CD6234-1
ACM120 POWER AMP
RS
INPUT
-VCC
-VCC
+VCC
-VCC
+VCC
8 OHMS
100VAC
70VAC
C
240VAC
+VCC
-VCC
A
N
4 OHMS
COMMON
B
-
1
-
2
-
3
-
4
-
5
-
6
-
7
-
8
AUDIO TELEX ACM60 Operating Instructions Manual
- Category
- Musical Equipment
- Type
- Operating Instructions Manual
- This manual is also suitable for
AUDIO TELEX ACM60 is a mixer amplifier designed for commercial installations, featuring 4 microphone/line inputs, individual channel controls, master output control, and a 6-zone 100-volt speaker selector with all-call. It delivers 60 watts into 8 ohms, 70 or 100-volt line. With bass and treble controls, a built-in 4-tone generator, and VOX muting, it's ideal for applications like paging, background music, and public address systems.
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