Full Text Searchable PDF User Manual
ZM 84 Audio Mixer
User Manual
Order code: CRAM41
ZM 8
4
A
udio Mix
er
MIC/LINE 1
MIC/LINE 1
MIC/LINE 2
MIC/LINE 3
MIC/LINE 4
AUX 4
L
R
AUX 1
AUX 2
AUX 3
AUX 4
MASTER 1
MASTER 2
–∞
–∞
0
0
+6
+10
–∞
+6
OFF
ON
POWER
-20
PEAK
SIG
–∞
+10
PEAK
SIG
+20
+10
0
-10
-20
+20
+10
0
-10
–∞
+10
PEAK
SIG
–∞
+10
PEAK
SIG
–∞
+10
PEAK
SIG
–∞
+10
PEAK
SIG
–∞
+10
PEAK
SIG
–∞
+10
PEAK
SIG
VOX
THR
VOX
ACTIVE
VOX
ACTIVE
VOX
THR
BASS
-15
+15
TREBLE
-15
+15
BASS
-15
+15
TREBLE
-15
+15
BASS
-15
+15
TREBLE
-15
+15
BASS
-15
+15
TREBLE
-15
+15
BASS
-15
+15
TREBLE
-15
+15
BASS
-15
+15
TREBLE
-15
+15
BASS
-15
+15
TREBLE
-15
+15
BASS
-15
+15
TREBLE
-15
+15
dB
P
OUTPUT 4
OUTPUT 4
OUTPUT 3
OUTPUT 2
OUTPUT 1
AUDIO BUS OUT
AUX 3
AUX 2
AUX 1
AUDIO BUS IN
OUTPUT 3
–∞
+10
EMR MUTE
+ LINK
GAIN
MIX IN
POWER INPUT: 100-240V~50/60Hz
FUSE: T1A 250V
POWER CONSUMPTION (max.): 20W
MIC/LINE 4
PHANTOM
+48V
PAD
-30dB
GAIN
MIX IN
dB
–∞
+10
MIC/LINE 3
PHANTOM
+48V
PAD
-30dB
GAIN
MIX IN
dB
–∞
+10
MIC/LINE 2
PHANTOM
+48V
PAD
-30dB
GAIN
MIX IN
dB
–∞
+10
MIC/LINE 1
PHANTOM
+48V
PAD
-30dB
GAIN
MIX IN
dB
–∞
+10
L
R
www.cleveracoustics.co.uk
WARN
ING:
TO REDUCE THE R
ISK OF FI
RE OR ELE
CTR
IC SH
OCK.
DO NOT E
XPOSE TH
IS EQU
IPMENT TO RAI
N OR M
OIS
TURE
CAUT
ION
RISK O
F ELECTR
IC SH
OCK
DO NOT O
PEN. N
O USER
SERVI
CABLE PAR
TS I
NSIDE
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ZM 84 Audio Mixer
User Manual
2
Safety advice
WARNING
FOR YOUR OWN SAFETY, PLEASE READ THIS USER MANUAL
CAREFULLY BEFORE YOUR INITIAL START-UP!
• Before your initial start-up, please make sure that there is no damage caused during transportation.
• Should there be any damage, consult your dealer and do not use the equipment.
• To maintain the equipment in good working condition and to ensure safe operation, it is necessary
for the user to follow the safety instructions and warning notes written in this manual.
• Please note that damages caused by user modifications to this equipment are not subject to warranty.
IMPORTANT:
The manufacturer will not accept liability for any resulting damages caused by the non-observance
of this manual or any unauthorised modification to the equipment.
OPERATING DETERMINATIONS
If this equipment is operated in any other way, than those described in this manual, the product may suffer damage and
the warranty becomes void. Incorrect operation may lead to danger e.g: short-circuit, burns and electric shocks etc.
Do not endanger your own safety and the safety of others!
Incorrect installation or use can cause serious damage to people and/or property.
• Speaker & Amplifier systems can produce high sound
pressure levels, please operate all controls with caution to
ensure people are not exposed to excessive or dangerous
sound pressure levels.
• Never let the power cable come into contact with other
cables. Handle the power cable and all mains voltage
connections with particular caution!
• Never remove warning or informative labels from the unit.
• Do not open the equipment and do not modify the unit.
• Do not switch the equipment on and off in short intervals,
as this will reduce the system’s life.
• Only use the equipment indoors.
• Do not expose to flammable sources, liquids or gases.
• Always disconnect the power from the mains when
equipment is not in use or before cleaning! Only handle
the power-cable by the plug. Never pull out the plug by
pulling the power-cable.
• Make sure that the available voltage
is 240V, 50Hz AC or 24V DC.
• Make sure that the power cable is never crimped or
damaged. Check the equipment and the power cable
periodically.
• If the equipment is dropped or damaged, disconnect the
mains power supply immediately and have a qualified
engineer inspect the equipment before operating again.
• If the equipment has been exposed to drastic
temperature fluctuation (e.g. after transportation),
do not connect power or switch it on immediately.
The arising condensation might damage the equipment.
Leave the equipment switched off until it has reached
room temperature.
• If your product fails to function correctly, stop use
immediately. Pack the unit securely (preferably in the
original packing material), and return it to your Prolight
dealer for service.
• Only use fuses of same type and rating.
• Repairs, servicing and power connection must only be
carried out by a qualified technician. THIS UNIT CONTAINS
NO USER SERVICEABLE PARTS.
• WARRANTY: Three years from date of purchase.
CAUTION!
KEEP THIS EQUIPMENT
AWAY FROM RAIN,
MOISTURE AND LIQUIDS
CAUTION!
TAKE CARE USING
THIS EQUIPMENT!
HIGH VOLTAGE-RISK
OF ELECTRIC SHOCK!!
www.cleveracoustics.co.uk
ZM 84 Audio Mixer
User Manual
3
Product overview & technical specifications
The ZM 84 rackmountable audio mixer from Clever Acoustics is ideal for public address and background music
systems where multiple inputs are required. The front panel features easy to adjust operator controls plus a series
of recessed engineer controls for bass, treble and VOX priority.
The ZM 84 mixer has 8 input channels, each with adjustable volume controls. Four of these channels are mono
mic/line inputs via XLR sockets, the other four channels are RCA line level stereo inputs. Adding to the features
the ZM 84 has a 2 band EQ for each channel, two master outputs and a front panel mounted AUX input ideal
for MP3 players. Internally, the ZM 84 features a comprehensive jumper system for configuration of the output
routing, high pass filters and audio bus in/out for linking multiple ZM 84 zone mixers.
• Four MIC/LINE XLR balanced
inputs each with 80Hz high pass
filter, switchable 48V phantom
power, -30dB pad and adjustable
gain control
• MIC1 input features XLR
connectors located on both
the front and rear panel
• Four stereo AUX unbalanced phono
input channels, three mounted on
the rear panel, one mounted on the
front panel
• Each input channel is equipped
with volume control and tone control
• Signal/peak value LED light monitors
for each input channel
• Each input channel can be assigned
to any output channel via the internal
jumper system
• MIC1/MIC2 priority control and
adjustable threshold value
• Four XLR balanced outputs
with outputs 3 and 4 in parallel
connection with 2 channels of
RCA unbalanced outputs
• Four audio BUS balanced inputs
via RJ45 which can be routed
into the main XLR outputs with
adjustable volume
• Four audio BUS balanced outputs
via RJ45 for linking to additional
ZM 84 2 zone audio mixers
• Five segment, LED output
level indicators
• Mute function via contact closure
for muting all channels
• Internal switch mode, multi voltage
power supply
• 1U 19” rackmount chassis with
brushed aluminium front panel
ZM 84 Audio Mixer
Specifications
ZM 84 Audio Mixer
Power consumption
20W
Power supply
100-240V AC 50Hz/60Hz
Fuse
T1A 250V
Dimensions
44 x 484 x 238mm
Weight
3.9kg
Order code
CRAM41
ZM 8
4
A
udio Mix
er
MIC/LINE 1
MIC/LINE 1
MIC/LINE 2
MIC/LINE 3
MIC/LINE 4
AUX 4
L
R
AUX 1
AUX 2
AUX 3
AUX 4
MASTER 1
MASTER 2
–∞
–∞
0
0
+6
+10
–∞
+6
OFF
ON
POWER
-20
PEAK
SIG
–∞
+10
PEAK
SIG
+20
+10
0
-10
-20
+20
+10
0
-10
–∞
+10
PEAK
SIG
–∞
+10
PEAK
SIG
–∞
+10
PEAK
SIG
–∞
+10
PEAK
SIG
–∞
+10
PEAK
SIG
–∞
+10
PEAK
SIG
VOX
THR
VOX
ACTIVE
VOX
ACTIVE
VOX
THR
BASS
-15
+15
TREBLE
-15
+15
BASS
-15
+15
TREBLE
-15
+15
BASS
-15
+15
TREBLE
-15
+15
BASS
-15
+15
TREBLE
-15
+15
BASS
-15
+15
TREBLE
-15
+15
BASS
-15
+15
TREBLE
-15
+15
BASS
-15
+15
TREBLE
-15
+15
BASS
-15
+15
TREBLE
-15
+15
4
4mm
484mm
238mm
ZM 8
4
A
udio Mix
er
MIC/LINE 1
MIC/LINE 1
MIC/LINE 2
MIC/LINE 3
MIC/LINE 4
AUX 4
L
R
AUX 1
AUX 2
AUX 3
AUX 4
MASTER 1
MASTER 2
–∞
–∞
0
0
+6
+10
–∞
+6
OFF
ON
POWER
-20
PEAK
SIG
–∞
+10
PEAK
SIG
+20
+10
0
-10
-20
+20
+10
0
-10
–∞
+10
PEAK
SIG
–∞
+10
PEAK
SIG
–∞
+10
PEAK
SIG
–∞
+10
PEAK
SIG
–∞
+10
PEAK
SIG
–∞
+10
PEAK
SIG
VOX
THR
VOX
ACTIVE
VOX
ACTIVE
VOX
THR
BASS
-15
+15
TREBLE
-15
+15
BASS
-15
+15
TREBLE
-15
+15
BASS
-15
+15
TREBLE
-15
+15
BASS
-15
+15
TREBLE
-15
+15
BASS
-15
+15
TREBLE
-15
+15
BASS
-15
+15
TREBLE
-15
+15
BASS
-15
+15
TREBLE
-15
+15
BASS
-15
+15
TREBLE
-15
+15
dB
P
OUTPUT 4
OUTPUT 4
OUTPUT 3
OUTPUT 2
OUTPUT 1
AUDIO BUS OUT
AUX 3
AUX 2
AUX 1
AUDIO BUS IN
OUTPUT 3
–∞
+10
EMR MUTE
+ LINK
GAIN
MIX IN
POWER INPUT: 100-240V~50/60Hz
FUSE: T1A 250V
POWER CONSUMPTION (max.): 20W
MIC/LINE 4
PHANTOM
+48V
PAD
-30dB
GAIN
MIX IN
dB
–∞
+10
MIC/LINE 3
PHANTOM
+48V
PAD
-30dB
GAIN
MIX IN
dB
–∞
+10
MIC/LINE 2
PHANTOM
+48V
PAD
-30dB
GAIN
MIX IN
dB
–∞
+10
MIC/LINE 1
PHANTOM
+48V
PAD
-30dB
GAIN
MIX IN
dB
–∞
+10
L
R
www.cleveracoustics.co.uk
WARN
ING:
TO REDUCE THE R
ISK OF FI
RE OR ELE
CTR
IC SH
OCK.
DO NOT E
XPOSE TH
IS EQU
IPMENT TO RAI
N OR M
OIS
TURE
CAUT
ION
RISK O
F ELECTR
IC SH
OCK
DO NOT O
PEN. N
O USER
SERVI
CABLE PAR
TS I
NSIDE
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ZM 84 Audio Mixer
User Manual
4
Panel & connection identification
16 - AC Mains Power Input
17 - Unbalanced Line Outputs
– Zones 3-4
18 - Balanced Line Outputs
– Zones 1-4
19 - Audio BUS RJ45 Input
20 - Emergency Mute Facility
21 - AUX 1-3 Unbalanced Stereo
Line Level Inputs
22 - MIC/Line Gain, Phantom Power
(+48V) and 30dB Pad Controls
23 - MIC/Line Balanced
Audio Inputs
24 - Audio BUS RJ45 Output
25 - Audio BUS RJ45 Input
Volume Control
01 - MIC/Line 1 Signal Input
02 - AUX 4 Signal Input
03 - MIC/Line 1-4 Tone Control
04 - MIC 1 Mute (VOA Priority)
Adjustment
05 - MIC 2 Mute (VOA Priority)
Adjustment
06 - AUX 1-4 Tone Control
07 - Zone 1 Master Volume Controls
08 - Output VU Meter
09 - Zone 2 Master Volume Controls
10 - Power Indicator LED
11 - MIC/Line 1-4 Signal and
Overload LED Indicators
12 - MIC/Line 1-4 Volume Controls
13 - AUX 1-4 Signal and
Overload LED Indicators
14 - AUX 1-4 Volume Controls
15 - Power Switch
ZM 8
4
A
udio Mix
er
MIC/LINE 1
MIC/LINE 1
MIC/LINE 2
MIC/LINE 3
MIC/LINE 4
AUX 4
L
R
AUX 1
AUX 2
AUX 3
AUX 4
MASTER 1
MASTER 2
–∞
–∞
0
0
+6
+10
–∞
+6
OFF
ON
POWER
-20
PEAK
SIG
–∞
+10
PEAK
SIG
+20
+10
0
-10
-20
+20
+10
0
-10
–∞
+10
PEAK
SIG
–∞
+10
PEAK
SIG
–∞
+10
PEAK
SIG
–∞
+10
PEAK
SIG
–∞
+10
PEAK
SIG
–∞
+10
PEAK
SIG
VOX
THR
VOX
ACTIVE
VOX
ACTIVE
VOX
THR
BASS
-15
+15
TREBLE
-15
+15
BASS
-15
+15
TREBLE
-15
+15
BASS
-15
+15
TREBLE
-15
+15
BASS
-15
+15
TREBLE
-15
+15
BASS
-15
+15
TREBLE
-15
+15
BASS
-15
+15
TREBLE
-15
+15
BASS
-15
+15
TREBLE
-15
+15
BASS
-15
+15
TREBLE
-15
+15
dB
P
OUTPUT 4
OUTPUT 4
OUTPUT 3
OUTPUT 2
OUTPUT 1
AUDIO BUS OUT
AUX 3
AUX 2
AUX 1
AUDIO BUS IN
OUTPUT 3
–∞
+10
EMR MUTE
+ LINK
GAIN
MIX IN
POWER INPUT: 100-240V~50/60Hz
FUSE: T1A 250V
POWER CONSUMPTION (max.): 20W
MIC/LINE 4
PHANTOM
+48V
PAD
-30dB
GAIN
MIX IN
dB
–∞
+10
MIC/LINE 3
PHANTOM
+48V
PAD
-30dB
GAIN
MIX IN
dB
–∞
+10
MIC/LINE 2
PHANTOM
+48V
PAD
-30dB
GAIN
MIX IN
dB
–∞
+10
MIC/LINE 1
PHANTOM
+48V
PAD
-30dB
GAIN
MIX IN
dB
–∞
+10
L
R
www.cleveracoustics.co.uk
WARN
ING:
TO REDUCE THE R
ISK OF FI
RE OR ELE
CTR
IC SH
OCK.
DO NOT E
XPOSE TH
IS EQU
IPMENT TO RAI
N OR M
OIS
TURE
CAUT
ION
RISK O
F ELECTR
IC SH
OCK
DO NOT O
PEN. N
O USER
SERVI
CABLE PAR
TS I
NSIDE
1
2
7
9
8
10
3
11 12
4
6
13 14
5
15
ZM 8
4
A
udio Mix
er
MIC/LINE 1
MIC/LINE 1
MIC/LINE 2
MIC/LINE 3
MIC/LINE 4
AUX 4
L
R
AUX 1
AUX 2
AUX 3
AUX 4
MASTER 1
MASTER 2
–∞
–∞
0
0
+6
+10
–∞
+6
OFF
ON
POWER
-20
PEAK
SIG
–∞
+10
PEAK
SIG
+20
+10
0
-10
-20
+20
+10
0
-10
–∞
+10
PEAK
SIG
–∞
+10
PEAK
SIG
–∞
+10
PEAK
SIG
–∞
+10
PEAK
SIG
–∞
+10
PEAK
SIG
–∞
+10
PEAK
SIG
VOX
THR
VOX
ACTIVE
VOX
ACTIVE
VOX
THR
BASS
-15
+15
TREBLE
-15
+15
BASS
-15
+15
TREBLE
-15
+15
BASS
-15
+15
TREBLE
-15
+15
BASS
-15
+15
TREBLE
-15
+15
BASS
-15
+15
TREBLE
-15
+15
BASS
-15
+15
TREBLE
-15
+15
BASS
-15
+15
TREBLE
-15
+15
BASS
-15
+15
TREBLE
-15
+15
dB
P
OUTPUT 4
OUTPUT 4
OUTPUT 3
OUTPUT 2
OUTPUT 1
AUDIO BUS OUT
AUX 3
AUX 2
AUX 1
AUDIO BUS IN
OUTPUT 3
–∞
+10
EMR MUTE
+ LINK
GAIN
MIX IN
POWER INPUT: 100-240V~50/60Hz
FUSE: T1A 250V
POWER CONSUMPTION (max.): 20W
MIC/LINE 4
PHANTOM
+48V
PAD
-30dB
GAIN
MIX IN
dB
–∞
+10
MIC/LINE 3
PHANTOM
+48V
PAD
-30dB
GAIN
MIX IN
dB
–∞
+10
MIC/LINE 2
PHANTOM
+48V
PAD
-30dB
GAIN
MIX IN
dB
–∞
+10
MIC/LINE 1
PHANTOM
+48V
PAD
-30dB
GAIN
MIX IN
dB
–∞
+10
L
R
www.cleveracoustics.co.uk
WARN
ING:
TO REDUCE THE R
ISK OF FI
RE OR ELE
CTR
IC SH
OCK.
DO NOT E
XPOSE TH
IS EQU
IPMENT TO RAI
N OR M
OIS
TURE
CAUT
ION
RISK O
F ELECTR
IC SH
OCK
DO NOT O
PEN. N
O USER
SERVI
CABLE PAR
TS I
NSIDE
16
17
21
23
18
19
24
20
25
22
Front Panel Layout:
Rear Panel Layout:
www.cleveracoustics.co.uk
ZM 84 Audio Mixer
User Manual
5
Layout identification:
1. MIC/Line 1 Signal Input
MIC/Line 1 signal input is replicated from the rear panel onto the front panel of the ZM 84 for ease of
access. MIC/Line/Phantom Power selection and gain control for this input is located on the rear panel.
2. AUX 4 Signal Input
Stereo line level input via L/R female phono (RCA) sockets.
3. MIC/Line 1-4 Tone Control
During initial setup the high frequency and low frequency tone adjustments should be set to the zero
point (3 O'clock position). Turn the level control anti clockwise to reduce the high/low frequency tones,
or turn clockwise to adjust the increase the high/low frequency tones. Adjustments should be made
gradually to avoid any sudden changes to the audio output.
4. MIC 1 Mute (VOX Priority) Adjustment
Microphone input 1 features automatic priority (VOX) over MIC/LINE channels 3 &4 plus AUX channels
1-4. To adjust the sensitivity, turn the potentiometer anti-clockwise for the clockwise to reduce the
sensitivity or clockwise to increase the sensitivity. Note: when the VOX priority is activated, both MIC/
Line1 and MIC/Line2 will be activated. When the VOX function is activated, the LED indicator will
illuminate amber.
5. MIC 2 Mute (VOX Priority) Adjustment
Microphone input 2 features automatic priority (VOX) over MIC/LINE channels 3 &4 plus AUX channels
1-4. To adjust the sensitivity, turn the potentiometer anti-clockwise for the clockwise to reduce the
sensitivity or clockwise to increase the sensitivity. Note: when the VOX priority is activated, both MIC/
Line1 and MIC/Line2 will be activated.
6. AUX 1-4 Tone Control
During initial setup the high frequency and low frequency tone adjustments should be set to the zero
point (3 O'clock position). Turn the level control anti clockwise to reduce the high/low frequency tones,
or turn clockwise to adjust the increase the high/low frequency tones. Adjustments should be made
gradually to avoid any sudden changes to the audio output.
7. Zone 1 Master Volume Controls
The Zone 1 master output volume is adjustable. Turn the level control anti clockwise to the lowest
setting, or turn clockwise to adjust to the highest setting.
8. Output VU Meter
The output level indicator (VU meter) has three green LEDs and two amber LEDs. During normal
operation, the output meter should show only green LEDs. As the output reaches maximum, the first
amber LED will illuminate followed by the red LED to indicate +20dB over signal. Care should be taken
to keep the output signal within the green LEDs with only occasional peak’s illuminating the amber
LEDs. If the Red +20dB LED is illuminated, the output volume should be reduced.
Operating instructions
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ZM 84 Audio Mixer
User Manual
6
Operating instructions
9. Zone 2 Master Volume Controls
The Zone 2 master output volume is adjustable. Turn the level control anti clockwise to the lowest
setting, or turn clockwise to adjust to the highest setting.
10. Power Indicator LED
The Power LED will illuminate to indicate the zone mixer is powered on. If the power LED
is not illuminated, check first the position of the on/off switch and then check the mains supply
(including fuse).
11. MIC/Line 1-4 Signal & Overload LED Indicators
Each input channel features visual indication of signal present, and signal overload. To indicate when
a signal is inputted into a channel, the green signal LED will flash or if the signal is strong the LED will
illuminate fully. When the input signal is too high for the pre-amplifier, the signal overload LED will flash
red, indicating a reduction in gain may be required to prevent signal distortion or system damage.
For MIC/Line inputs 1-4 the gain reduction can be made using the gain potentiometer on the rear panel,
for AUX 1-4 the gain reduction must be made at source or using an in-line attenuator.
12. MIC/Line 1-4 Volume Controls
Each of the MIC/Line volumes are adjustable. Turn the level control anti clockwise to the lowest setting,
or turn clockwise to adjust to the highest setting.
13. AUX 1-4 Signal & Overload LED Indicators
Each input channel features visual indication of signal present, and signal overload. To indicate when
a signal is inputted into a channel, the green signal LED will flash or if the signal is strong the LED will
illuminate fully. When the input signal is too high for the pre-amplifier, the signal overload LED will flash
red, indicating a reduction in gain may be required to prevent signal distortion or system damage. For
AUX 1-4 channels the gain reduction must be made at the audio source or using an in-line attenuator.
14. AUX 1-4 Volume Controls
Each of the AUX volumes are adjustable. Turn the level control anti clockwise to the lowest setting,
or turn clockwise to adjust to the highest setting.
15. Power Switch
On/Off control for the zone mixer.
16. AC Mains Power Input
240V~50Hz AC mains voltage input. This product falls under CLASS 1 and must have a protective earth
connection at all times.
17. Unbalanced Line Outputs – Record outputs 3-4
Unbalanced, 0dBu mono outputs for each of the two record outputs. Each zone output features a
female phono (RCA) connector. The output volume for the record outputs is fixed and is not altered by
the master volume control for the zone outputs.
www.cleveracoustics.co.uk
ZM 84 Audio Mixer
User Manual
7
Operating instructions
18. Balanced Line Outputs – Zones 1-2
Balanced, +4dBu mono outputs for each of the two output zones. Each zone output features a male
XLR connector.
19. Audio BUS RJ45 Input
The ZM 84 features an RJ45 input port for linking multiple ZM 84 zone mixers. The input volume may
be adjusted using the Audio BUS Input Volume Control.
20. Emergency Mute Facility
The emergency mute facility provides system wide MUTE function. To activate the mute facility, use a
contact closure or relay to close the circuit between the two contacts of the Emergency Mute port.
21. AUX 1-3 Unbalanced Stereo Line Level Inputs
AUX inputs 1-3 each feature a pair of unbalanced, phono (RCA) sockets for line level input from audio
sources such as radio tuners, CD players or MP3 players.
22. MIC/Line 1-4 Gain, Phantom power (+48V) and 30dB pad controls.
Each of the MIC/Line inputs 1 thru 4 all feature controls for input gain, phantom power and 30dB
attenuation pad.
•
Input Gain: To allow the installer to match levels between audio sources, the ZM 84 features a
rotary input gain control for each channel. Turn the level control anti clockwise to the lowest setting,
or turn clockwise to adjust to the highest setting.
•
+48V Phantom Power: The ZM 84 features switchable phantom power on each of the MIC 1-4
channels for use with condenser type microphones. Selection of Phantom Power status should
be made before the zone mixer is powered on. Phantom Power relies on balanced cabling for
correct operation.
•
-30dB Attenuation Pad: To facilitate the use of line level audio sources, MIC/Line inputs 1-4 each
feature a switchable -30dB attenuation pad. If the input signal is too high or known to be from a line
level source, the attenuation pad should be switched on by pressing the switch to the IN position.
•
The ZM 84 features an 80Hz low cut filter, this can be activated via the internal jumper system.
To do so, a qualified engineer must power down the unit, disconnect from power and follow the
instructions in this manual to use the correct internal jumper.
23. MIC/Line 1-4 Balanced Audio Inputs
MIC/Line inputs 1-4 all feature balanced, mono audio inputs, each with selectable phantom
power (48V), -30dB attenuation pad and adjustable input gain (-60dB ~ +10dB) for use with MIC/
MIC+Phantom/Line signals.
24. Audio BUS RJ45 Output
The ZM 84 features an RJ45 output port for linking multiple ZM 84 zone mixers. The audio routing may
be selected via the internal jumper system.
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Operating instructions
25. Audio BUS RJ45 Input Volume Control
To adjust the input signal level on the Audio BUS, turn the level control anti clockwise to the lowest
setting, or turn clockwise to adjust to the highest setting.
Power On/Off Procedure
Prior to making any connection to the mains power or audio inputs/outputs, turn all level controls
counter clockwise to the “min” position and all tone (equaliser) controls to the mid (zero) point.
Switch on the zone mixer and any audio sources (MP3 players, CD players, Microphones etc) before
powering the systems amplifier ON. The last product to be switched on should be the power/slave
amplifiers to prevent any unwanted noise or potential damage to speakers or amplifiers. If you wish
to power off the system, turn the amplifier’s master volume control counter clockwise to the “min”
position before switching the amplifier OFF before any audio sources are switched off. By following this
procedure it will prevent acoustic shocks to the speakers or potential damage to system components.
After connecting all audio sources and powering on the system, adjust the level of each audio input,
select the zone routing in order to achieve the desired “mix” for each zone. Care should be taken
to when adjusting microphone input volumes and the master volume, adjust both of these in small
increment’s to avoid feedback (howl around). The goal is to achieve a clear balance between music
and voice ensuring announcements can be clearly heard.
Internal Jumper System Configuration:
Cascading Multiple Units:
Via the AUDIO BUS IN and OUT connectors 16 units can be combined to one system
so that you have available max. 64 MIC/LINE and 48 AUX inputs.
The audio signal will be fed to the next unit via the “AUDIO BUS OUT“ output.
Via the mute link connector the different mute signals are passed to the other units. This allows
i.e. that a VOX priority of MIC1 not only mutes the inputs of the particular unit but also the inputs
of the other units.
By internal jumpers you can select to what external mute signals a particular unit should react.
You find more details in chapter 3.5.
By shortening the mute link connector all inputs of all connected units will be muted.
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Operating instructions
Positions of Jumpers:
B.
Jumper for mono/stereo
selection of AUX inputs.
C.
Jumper for low cut On/Off
of Mic inputs.
D.
Jumper for input routing.
E.
Jumper for MUTE-LINK mode.
Important Warning:
The
internal jumper system
should only be adjusted by
a qualified engineer with
suitable electrical knowledge.
Before commencing any work
internally, the ZM 84 should
be disconnected and isolated
from the electrical supply.
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Low Cut:
For the inputs MIC1-4 a 80Hz
low cut filter can be activated
for each channel by setting of
a jumper.
Factory setting is filter 'OFF'.
Mono / Stereo:
For the inputs MIC1-4 a 80Hz
low cut filter can be activated
for each channel by setting of
a jumper.
Factory setting is 'ST' (stereo).
Mute Link:
Configuration of the Mute-Link functions is done by these jumpers.
Factory setting is jumper J11.2, J11.3 in OFF, and the jumper J11.0
in ON position.
Signal Routing:
Every audio input can be
individually assigned to one
of the internal busses.
Factory setting is all jumpers
in 'ON' position.
The function of the particular
jumpers can be seen from the
block diagram.
Operating instructions
ON
OFF
J11.1
Output of internal mute signals activated
Output of internal mute signals deactivated
J11.2
Output of external VOX signals deactivated
Output of external VOX signals activated
J11.3
Output of external PRIO signals deactivated
Output of external PRIO signals activated
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Block
Overview
Routing:
Block Diagrams
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MIC 1 Block Diagram:
MIC 3 Block Diagram:
MIC 2 Block Diagram:
MIC 4 Block Diagram:
Block Diagrams
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AUX 1 Block Diagram:
AUX 3 Block Diagram:
AUX 2 Block Diagram:
AUX 4 Block Diagram:
Block Diagrams
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Block Diagrams
Block Diagram:
Pin Configuration:
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Block Diagrams & Typical panel connections
Typical Panel Connections:
EMER Block Diagram:
INSERT Block Diagram:
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WEEE notice
Correct Disposal of this Product
(Waste Electrical & Electronic Equipment)
(Applicable in the European Union and other European countries
with separate collection systems)
This marking shown on the product or its literature, indicates that it should not be disposed
with other household wastes at the end of its working life. To prevent possible harm to the
environment or human health from uncontrolled waste disposal, please separate this from other
types of wastes and recycle it responsibly to promote the sustainable reuse of material resources.
Household users should contact either the retailer where they purchased this product, or their
local government office, for details of where and how they can take this item for environmentally
safe recycling.
Business users should contact their supplier and check the terms and conditions of the
purchase contract. This product should not be mixed with other commercial wastes for disposal.