MA60 & MA60media
MIXER-AMPLIFIERS
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Installation and User Guide
MA60 & MA60media Installation and User Guide v1.2
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WARNING:
To reduce the risk of re or electric shock, do not expose this appliance to rain or
moisture.
CAUTION:
Use of controls or adjustments or performance of procedures other than those
specied may result in hazardous radiation exposure.
CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
WARNING: SHOCK HAZARD - DO NOT OPEN
AVIS: RISQUE DE CHOC ÉLECTRIQUE - NE PAS OUVRIR
The lightning ash with the arrowhead symbol within an equilateral triangle, is
intended to alert you to the presence of uninsulated dangerous voltages within
the product’s enclosure that may be of sufcient magnitude to constitute a risk of
electric shock.
The exclamation point within an equilateral triangle is intended to alert the
user to the presence of important operating and maintenance (servicing)
instructions in the literature accompanying the appliance.
IMPORTANT SAFETY INSTRUCTIONS
1. Read these Instructions.
2. Keep these Instructions.
3. Heed all Warnings.
4. Follow all instructions.
5. Do not use this apparatus near water.
6. Clean only with a dry cloth.
7. Do not block any ventilation openings. Install in accordance with the
manufacturer’s instructions.
8. Do not install near any heat sources such as radiators, heat registers, stoves, or
other apparatus (including ampliers) that produce heat.
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MA60 & MA60media Installation and User Guide v1.2
9. Do not defeat the safety purpose of the polarized or grounding - type plug. A
polarized plug has two blades with one wider than the other. A grounding type
plug has two blades and a third grounding prong. The wide blade or the third
prong are provided for your safety. When the provided plug does not t into
your outlet, consult an electrician for replacement of the obsolete outlet.
10. Protect the power cord from being walked on or pinched particularly at plugs,
convenience receptacles, and the point where they exit from the apparatus.
11. Only use attachments/accessories specied by the manufacturer.
12. Unplug this apparatus during lightning storms or when unused for long periods
of time.
13. Refer all servicing to qualied service personnel. Servicing is required when the
apparatus has been damaged in any way, such as power-supply cord or plug is
damaged, liquid has been spilled or objects have fallen into the apparatus, the
apparatus has been exposed to rain or moisture, does not operate normally, or
has been dropped.
Do not expose the apparatus to dripping or splashing, and ensure that no
objects lled with liquids, such as vases, are placed on the apparatus.
L’appareil ne doit pas être exposé aux écoulements ou aux éclaboussures et aucun
objet ne contenant de liquide, tel qu’un vase, ne doit être placé sur l’appareil.
The mains plug is used as the disconnect device and it should remain readily
accessible during intended use. In order to electrically isolate the apparatus
from the mains, the mains plug should be completely removed from the mains outlet
socket.
La prise du secteur ne doit pas être obstruée ou doit être facilement accessible
pendant son utilisation. Pour être complètement déconnecté de l’alimentation
d’entrée, la prise doit être débranchée du secteur.
This apparatus is of Class I construction and must only be connected to a
mains outlet socket with a protective earthing connection.
Terminals marked with the ( ) symbol may use Class 2 Wiring, but voltages at
these terminals may be of sufcient magnitude to constitute a risk of electric
shock. The external wiring connected to these terminals requires installation by an
instructed person or the use of pre-made leads or cords.
MA60 & MA60media Installation and User Guide v1.2
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Contents
Safety Information ........................................................6
Safety notes regarding installation........................................................6
Conformities ............................................................................................. 6
Safety Considerations and Information .............................................. 7
CAUTION – High Voltages ............................................................... 7
CAUTION - Mains Fuses .................................................................. 7
CAUTION – Servicing ....................................................................... 7
General Description ......................................................8
MA60 and MA60media main features ................................................. 8
Applicable Models .................................................................................... 9
What’s in the Box .................................................................................... 9
Block diagram ............................................................. 10
Front panel description ............................................. 11
Rear panel description ............................................... 12
Installation .................................................................. 14
Mechanical ............................................................................................... 14
Rackmounting a single unit .............................................................. 14
Rackmounting two units .................................................................. 15
Ventilation ................................................................................................ 16
Connections and adjustments.............................................................16
Music inputs ........................................................................................ 16
Mic input .............................................................................................. 18
Outputs................................................................................................20
Music Mute Input ............................................................................... 25
Ext Standby Input ..............................................................................26
MA60media digital media player .............................. 27
Compatible media..................................................................................27
File types and rates supported ........................................................... 27
Basic operation .......................................................................................28
Normal Mode ..................................................................................... 28
Repeat mode ...................................................................................... 29
Random Mode .................................................................................... 29
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MA60 & MA60media Installation and User Guide v1.2
Appendix ..................................................................... 29
Installation of speaker EQ cards .........................................................29
Installation Instructions .................................................................... 30
PCB layout diagrams .............................................................................30
Table of internal jumpers and default settings ............................ 31
General Notes ........................................................................................32
Multi-zone applications ....................................................................32
EMC considerations .......................................................................... 33
Earthing ................................................................................................ 33
Technical specications .........................................................................34
General specications ...........................................................................35
MA60 & MA60media Installation and User Guide v1.2
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Safety Information
Safety notes regarding installation
• Do not expose the unit to water or moisture.
• Do not expose the unit to naked ames.
• Do not block or restrict any air vent.
• Do not operate the unit in ambient temperatures above 35 °C.
• Do not touch any part or terminal carrying the hazardous live symbol ( ) while
power is supplied to the unit.
• Do not perform any internal adjustments unless you are qualied to do so and
fully understand the hazards associated with mains operated equipment.
• The unit has no user serviceable parts. Refer any servicing to qualied service
personnel.
• If the moulded plug is cut off the AC power lead for any reason, the discarded
plug is a potential hazard and should be disposed of in a responsible manner.
Conformities
This product conforms to the following European EMC Standards:
BS EN 55103-1:2009
BS EN 55103-2:2009
This product has been tested for use in commercial and light industrial environments.
If the equipment is used in controlled EMC environments, the urban outdoors, heavy
industrial environments or close to railways, transmitters, overhead power lines etc.
the performance of the unit may be degraded.
The product conforms to the following European electrical safety standard.
BS EN 60065:2002 (+A2:2010)
The MA60 and MA60media mixer-ampliers have been developed and manufactured
with high quality materials and components, which can be recycled and/or re-used.
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MA60 & MA60media Installation and User Guide v1.2
Safety Considerations and Information
The unit must be earthed. Ensure that the mains power supply provides an effective
earth connection using a three-wire termination.
When the mains switch is in the off (‘O’) position the live and neutral conductors of
the mains transformer are disconnected.
CAUTION – High Voltages
Do not touch any part or terminal carrying the hazardous live symbol ( ) while
power is supplied to the unit.
Terminals to which the hazardous live symbol refers require installation by a qualied
person.
CAUTION - Mains Fuses
The MA60 and MA60media mixer-ampliers are tted with a replaceable mains fuse.
This is located on the rear panel below the AC mains input connector. Only replace
the fuse with one of an identical type and rating.
AC VOLTAGE FUSE TYPE FUSE RATING
230 V or 115 V 20 mm x 5 mm, T2A 2 amp
Note that the failure of the mains fuse may indicate an internal fault. If a replacement
fuse fails immediately the power is restored, no further attempt should be made to use
the mixer-amplier, and it should be returned to your Cloud service centre or other
qualied person for repair.
CAUTION – Servicing
The unit contains no user serviceable parts. Refer servicing to qualied service
personnel. Do not perform servicing unless you are qualied to do so.
Disconnect the power cable from the unit before removing the top panel and do not
make any internal adjustments with the unit switched on.
MA60 & MA60media Installation and User Guide v1.2
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General Description
The Cloud MA60 and MA60media are compact and versatile mixer-ampliers suitable
for use in Licensed Premises, Retail, Leisure and many other venues. The units can
deliver 60 W (mono) into 4 ohm loads; a transformer option is available for driving
100 V, 70 V or 50 V-line loudspeaker systems. The MA60media has an integral digital
media player which replays audio les in various formats from SD cards or USB
memory devices. In all other respects, the two models have identical facilities.
There are inputs for four stereo line signals and a microphone input for paging/
announcement use. Front panel controls are provided for music source selection,
music level and microphone levels; the MA60media has additional controls for the
digital media player section. There are also various controls of the ‘preset’ type on the
rear panel, and further unit conguration jumpers mounted internally on the main
PCB. A remote level control or combined level control/music source selector can be
wired to the unit for installations that require remote control.
MA60 and MA60media main features
• Four-input mixer-amplier with integral 60 W mono power amplier
• Built-in digital music player supports MP3 and WMA les from USB memory
sticks or SD (or MMC) cards at a wide range of standard data rates/sample
frequencies (Model MA60media only)
• Gain trims on all inputs
• Electronically-balanced mic input
• MIC input may be congured as telephone system interface to allow paging from
phone extensions
• Front panel controls for music source/level and mic level
• 3.5 mm jack input (LINE 2) for MP3 player, laptop, etc.
• Overall HF & LF EQ adjustment
• Short-to-ground paging with VOX or access-triggered mic-over-music priority
• Selectable LINE 4 priority over other music inputs
• Music Mute control input (NO or NC) for interface to emergency system
• Compatible with standard Cloud remote control panels – RL1 (music level) and
RSL4 (music level and source selection)
• Electronically-balanced pre-amp output (e.g., for connection to additional
ampliers)
• Transformer-isolated auxiliary output with independent mic and music level
control - for use with telephone MOH systems
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MA60 & MA60media Installation and User Guide v1.2
• Auxiliary output source selection (by internal jumper) – source may be xed or
following main output
• Remote Standby control input
• 2U half-width (9.5”) rack mounting unit
Available Options:
• RL-1 (UK) and RL-1A (USA) remote control panels for music volume
• RSL-4 (UK) and RSL-4A (USA) remote control panels for music source selection
and volume
• 100/70/50 V-line output transformer Model CXL-50T *
• A range of EQ cards, to match various popular loudspeakers*
• RE-L 19” rack mounting kit for one unit
• RE-S 19” rack mounting kit for two units
* these items are internally-tted
Applicable Models
This manual describes the installation and operation of the following models:
• Cloud MA60 4-input 60 W mono mixer-amplier
• Cloud MA60media 4-input 60 W mono mixer-amplier with integrated digital
media player
All models are 2U, half-rack width units. Apart from the inclusion of the digital media
player in the MA60media, the two models are identical for the practical purposes of
installation and operation. Unless specically stated otherwise, the information in this
manual may be taken to apply to either model.
What’s in the Box
Please check the shipping carton for damage before opening. If there is damage, please
contact your Cloud agent and the shippers.
The packing carton should contain the following items:
• MA60/MA60media mixer-amplier
• AC mains lead with IEC connector
• Set of mating plug-in screw-terminal connectors
• Set of four rubber feet
• This manual
MA60 & MA60media Installation and User Guide v1.2
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Block diagram
MIC 1
0V
MOH SOURCE
MEDIA PLAYER
LINE 1
LINE 2
LINE 3
LINE 4
PHANTOM
POWER
15V
ISOLATION
TRANSFORMER
TEL INPUT
TRANSFORMER
CONNECT INPUT
TO 0V TO OPEN
MIC CHANNEL
ACCESS
INPUT
0V
100Hz
0V
LINE 4
PRIORITY
ON/OFF
0V
MOH OUTPUT
MUTE CONTACT TYPE
MUSIC
MUTE
FORCE FRONT PANEL
SOURCE SELECT
RELEASE TIME
3s
6s
12s-NO JUMPER
0V
0V
8 OHMS
600 OHMS
ACCESS
BYPASS
VCA
0V
AVO
MIC PRIORITY
REMOTE LEVEL
CONNECTOR
3
2
1
RSL-4/RL-1
OPTIONAL REMOTE
SOURCE AND LEVEL
MIC EQ BYPASS
OPTIONAL LINE OUTPUT
TRANSFORMER
+
EQ
EQ CARD BYPASS
EQ
SOCKET
65Hz
0V
0V
SPEAKER OUTPUT
100V
70V
50V
COM
MIN LOAD
4 OHMS
POWER
DCP
AMPLIFIER
HIGH PASS FILTER
+VE
PRE-OUT
- VE
0V
FRONT PANEL
MUSIC SOURCE AND
LEVEL CONTROLS
0V
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MA60 & MA60media Installation and User Guide v1.2
Front panel description
0
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0
15 16 17 18
10 11 12 13 14
1 2 3 4 6 7 8
95
1. AC Power switch
2. Power ON LED
3. MICROPHONE LEVEL control – sets volume of mic input
4. MUSIC LEVEL control – adjusts music volume
5. PEAK LED – illuminates when internal signal clipping occurs
6. MUTE LED – illuminates when external Music Mute control is active
7. MUSIC SOURCE – rotary switch selecting music source (LINE 1* to LINE 4)
The following front panel items are only tted to the MA60media:
8. USB port – for connection of USB memory device containing audio les
9. SD Card slot – accepts SD or MMC memory cards containing audio les
10. PLAY/PAUSE button – starts or pauses playback of current track/le
11. STOP button – stops playback
12. PREVIOUS button – moves playback point to start of previous track or le
13. NEXT button – moves playback point to start of next track or le
14. MODE button – selects Random and Repeat Modes
15. PLAY LED – illuminates in PLAY mode
16. PAUSE LED – illuminates in PAUSE mode
17. RANDOM mode – illuminates when Random mode is selected
18. REPEAT mode – illuminates when Repeat mode is selected
* On the MA60MEDIA, switch position 1 will select the digital media player if it has been enabled by the rear
panel MEDIA/L1 button (see Rear Panel description).
MA60 & MA60media Installation and User Guide v1.2
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Rear panel description
1
20 49
2
5367 1415 16 817181011 12 19
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1. LINE 1 to LINE 4 – stereo line inputs for music sources (phono sockets)
2. MP3/Laptop input – alternative LINE 2 input (3.5 mm stereo jack)
3. GAIN 1 to GAIN 4 – level trims for each line input
4. OUTPUT EQ – LF and HF EQ adjustment for music and mic signal (selectable
to music-only by internal jumper)
5. MIC 1– balanced mic input
6. GAIN – mic input gain
7. ACCESS – external paging control input for MIC 1
8. LOW Z OUTPUT – speaker output for low-impedance circuits
9. LINE OUTPUT (under protective cover) - for connection to 100/70/50 V-line
loudspeaker system, when optional internal transformer is tted
10. MOH/UTILITY OUT – auxiliary output; can be used to provide Music On
Hold to telephone system
11. MOH/UTILITY MIC LEVEL – sets level of microphone at MOH/UTILITY OUT
12. MOH/UTILITY MUSIC LEVEL – sets level of music at MOH/UTILITY OUT
13. PRE OUT – balanced line level output for connection of additional external
ampliers, etc.
14. MUSIC MUTE – Emergency control input for muting music source
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MA60 & MA60media Installation and User Guide v1.2
15. REMOTE MUSIC CONTROL – for connection of RL-1 or RSL-4 remote
control panels
16. REMOTE/LOCAL – enables remote music control connector and disables
front panel controls (remote source select may be overridden by internal
jumper)
17. EXT. STANDBY – for remote power-down by PIR sensor or other external
control equipment
18. IEC mains input
19. Mains fuse
The following rear panel item is only tted to the MA60media:
20. MEDIA/L1 switch – selects Line 1 input to be external source or internal
media player
MA60 & MA60media Installation and User Guide v1.2
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Installation
Mechanical
The MA60 and MA60media mixer-ampliers may either be mounted in a standard 19”
equipment rack or used free-standing. Each unit occupies 2U of vertical rack space
and half a standard rack width. In order to install MA60/MA60media units in a 19”
rack, rackmount kits (available from Cloud) must be tted. Two types of rackmount
kit are available: one for mounting a single unit, the other for mounting two MA60/
MA60media units side-by-side. See below for mounting instructions.
If using the MA60/MA60media free-standing, the rubber feet (supplied with each
unit) should be tted. The unit should always be stood on a at surface. Care should
be exercised in selecting a location for a free-standing unit, which should allow
ventilation but be clear of any liquid or similar hazard.
Rackmounting a single unit
A single MA60/MA60media may be rackmounted with the RE-L mounting kit.
The RE-L kit consists of two rack brackets and eight M4 countersunk-head screws.
To rack-mount a single MA60/MA60media, simply t the two brackets as shown in the
diagram below, using the screws provided.
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MA60 & MA60media Installation and User Guide v1.2
Rackmounting two units
Two MA60/MA60media units may be rackmounted side-by-side with the RE-S
mounting kit.
The RE-S kit consists of two rack ears, two connecting plates and sixteen M4
countersunk screws. To rack-mount a pair of MA60/MA60medias, proceed as follows:
1. Fit one of the rack ears to the left-hand side of one of the MA60s as shown
in the diagram below, using four of the screws provided.
2. Repeat Step 1 for the right-hand side of the other MA60 unit.
3. Remove the two raised-head, hex-socket M4 screws at the right-hand side
of the front panel of the rst unit, and the corresponding two screws on the
left-hand side of the front panel of the second unit.
4. Line the two units up next to each another, and t one of the two at
connecting plates to the front panels, using four more of the screws
provided. The raised-head screws are no longer required.
5. Repeat Step 4, tting the remaining connector plate at the rear of the units.
MA60 & MA60media Installation and User Guide v1.2
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Ventilation
MA60 and MA60media mixer-ampliers are cooled by natural convection, via vents in
the top and bottom panels. Always allow adequate space around the unit(s) to allow a
free ow of air. In 19” rack installations we recommend leaving 1U of rack space above
and below each unit. In free-standing installations, always t the rubber feet supplied,
and do not stand any other items on top of the unit.
Connections and adjustments
Music inputs
The unit has four stereo line inputs, each of which is mixed internally to mono; these
inputs are suitable for most music sources such as compact disc players, tape players,
satellite receivers and the like.
All inputs are unbalanced and use RCA phono sockets 1. Line 2 has a second
(parallel) input connector in the form of a 3.5 mm 3-pole jack socket 2 to allow
convenient connection of a computer soundcard or MP3 player output. This is
a stereo, unbalanced input on a single connector. Plugging into this socket will
disconnect any source connected at Line 2’s phono connectors.
Line 4 input can be congured to have priority over any other music source, see
“Music Priority” on page 17.
Sensitivity & Gain Control
Each of the stereo line inputs has an input impedance of 47k ohms and a pre-set gain
control on the rear panel below the respective input sockets 3. The gain control
has a range of 20 dB allowing the input sensitivity to be varied from -12 dBu to
+8 dBu (0 dBu = 0.775 Vrms). The pre-set gain control should be adjusted so that all
the input sources in use are at roughly the same volume and that the front panel level
control has a useful range of control.
Music Source Select
This front panel four-position switch 7 is used to select the desired music signal. On
the MA60media only, note that the rst switch position will select either Line Input 1
or the internal digital media player, depending on the setting of the rear panel MEDIA/
L1 switch 20. Remote control of source selection is possible with a remote control
plate type RSL-4/RSL-4A, see “Remote Control of Music Source Select and Level” on
page 17.
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MA60 & MA60media Installation and User Guide v1.2
Music Level Control
A front panel-mounted music level control 4 is provided. Remote control of music
level is possible by connecting a remote control plate (either RSL-4/RSL-4A or RL-1/
RL-1A), see “Remote Control of Music Source Select and Level” below. If the music
level is set too high, the front-panel PEAK LED 5 illuminates. Note that this LED
also indicates excessive mic signal level.
Remote Control of Music Source Select and Level
The MA60 and MA60media mixer-ampliers are compatible with standard Cloud
remote control plates types RSL-4/RSL-4A (music source select and level) and RL-1/
RL-1A (level only). Either type of unit may be connected at the rear 3-pin 5 mm-pitch
screw terminal connector 15, using the wiring shown below.
REMOTE LEVEL CONTROL WIRING
RL-1
123
SINGLE-CORE SCREENED CABLE MAY BE USED
REMOTE MUSIC
CONNECTOR
123
REMOTE SOURCE & LEVEL CONTROL WIRING
123
RSL-4
USE TWO-CORE SCREENED CABLE
REMOTE MUSIC
CONNECTOR
123
Use two-core (RSL-4/RSL-4A or RL-1/RL-1A) or single-core (RL-1/RL-1A only)
screened cable to connect the remote level plate. The maximum recommended cable
length is 100 m.
Pressing the REMOTE/LOCAL button 16 above the rear panel connector activates
the remote control plate and disables both the front panel level and source select
controls. If an RL-1/RL-1A is being used, the internal jumper J9 should be moved from
its default ‘SW’ setting to ‘FR’, to override the disabling of the front panel source
select switch. See “Table of internal jumpers and default settings” on page 31 for
further information regarding the internal jumpers.
Music Priority
One audio source can be given automatic priority over all other music inputs by
connecting it to Line 4 input and moving internal jumpers J12A and J12B from the
OFF position (factory default) to ON. This is a useful facility when a Juke Box, Digital
MA60 & MA60media Installation and User Guide v1.2
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Sound Store, emergency announcement system or similar source forms part of the
audio system.
When Music Priority mode is enabled, the unit will operate normally until a signal
is detected at Line 4’s input. When this happens, the MA60/MA60media switches its
music source automatically to Line 4 (assuming it is not already selected to Line 4).
Once the signal at Line 4 stops (e.g., when the selected jukebox track has nished),
the previously selected source will smoothly restore to its former level. The time
taken for the restoration is set in the factory at 3 seconds, but it may be set at 6 or
12 seconds with internal jumper J11. (3s is suitable for announcements, but the longer
times may be more appropriate when a jukebox or similar is the Line 4 source.) See
“PCB layout diagrams” on page 30 for further information regarding the internal
jumpers.
Mic input
The MA60 and MA60media are provided with a single microphone input, allowing the
unit to be used for announcements. By default, the mic input has automatic priority
over the music source. It is also compatible with paging microphones with zone
selection by contact closure such as the Cloud PM range, including the PM1 singlezone microphone. See “Paging control” on page 19 for more details.
The MA60’s microphone pre-amplier is an electronically balanced, transformerless design congured for optimum low noise performance. The input impedance is
greater than 2k ohms and is suitable for microphones in the 200 ohm to 600 ohm
range. The connector is a 3-pin 3.5 mm-pitch screw terminal type on the rear panel
5
. Use the wiring shown below. Note that if using an unbalanced microphone, pins 1
and 2 should be connected together.
MIC INPUT
1 2 3
PIN 1: SCREEN (GROUND)
PIN 2: COLD/ANTIPHASE (-)
PIN 3: HOT/PHASE (+)
SCN
+
MIC INPUT
1 2 3
SCN
+
-
BALANCED CONNECTION UNBALANCED CONNECTION
15 V phantom power is available at the mic input, and is activated by setting internal
jumper J1 to the ON position. See “PCB layout diagrams” on page 30 for further
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MA60 & MA60media Installation and User Guide v1.2
information regarding the internal jumpers. Care should be taken to ensure that
phantom power is activated only when the microphone connected to the input
requires it – i.e., a capacitor or electret type; other types of microphones (such as
dynamic or ribbon) may be damaged if a DC voltage is applied to them.
Mic gain adjustment
The mic input has a preset gain control 6 adjacent to the input connector. The gain
can be adjusted over a range of 40 dB, from 10 dB to 50 dB. A high overload margin
is maintained at all gain settings. (Note - the gain range is modied if the telephone
matching transformer is in circuit. See “Paging via a telephone system” on page 20
for more details.)
Microphone level control
A front panel level control 3 is provided for the mic input and this provides the user
with a means of adjusting the volume of the microphone. The microphone signal is
unaffected by the music level control 4. The rear panel gain control 6 should be set
at a level where microphone distortion does not occur even when the front panel
level control is fully clockwise. If the mic level is set too high, the front-panel PEAK
LED 5 will illuminate. Note that this LED also indicates excessive music level.
Paging control
The mic input is equipped with an external access control input; this is a 2-pin
5 mm-pitch screw terminal connector 7 adjacent to the mic input connector. The
access input is primarily intended to provide compatibility with paging microphones
and their associated switching arrangements. By default, mic priority over music is via
AVO mode (Automatic VoiceOver) and the access port is disabled. In AVO mode, the
presence of a signal at the mic input automatically activates the priority circuitry, and
attenuates the current music source by 30 dB so that the announcement is audible.
To use the access port, move internal jumper J5 from its default ‘ON’ setting to
‘OFF’. See “PCB layout diagrams” on page 30 for further information regarding the
internal jumpers. Once enabled, the microphone input is muted as long as the pins of
the access connector are open-circuit. When the pins are connected together, the mic
input becomes active.
In either AVO or SW mode, the music signal is faded back up after the announcement
is complete. Unlike Line 4 priority, the fade-up time (‘release time’) is not adjustable.
If the mic input is being used for a non-announcement purpose (such as karaoke),
mic priority may be disabled by removing J14 altogether. In this setting, the mic input
may be mixed as desired with the music source. (It is recommended that J14 is left
attached to one pin of the header in case a different setting is needed in the future.)
MA60 & MA60media Installation and User Guide v1.2
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High pass lter
The microphone signal path includes a xed high-pass lter. This attenuates the mic
signal below 100 Hz, which helps to reduce the effects of microphone handling noise.
The lter may be taken out of circuit by moving internal jumper J7 from ON to
OFF. See “PCB layout diagrams” on page 30 for further information regarding the
internal jumpers.
Paging via a telephone system
The mic input on the MA60/MA60media may be recongured to accept an audio input
directly from a compatible telephone system. This permits announcements to be made
from some (or any) internal telephone extensions in a building. Not all telephone
systems are suitable for this application, and the system documentation should be
consulted in detail to ensure compatibility.
Internal jumpers J2, J3 and J4 need to be moved for this application. See “PCB layout
diagrams” on page 30 for further information regarding the internal jumpers. This
inserts a transformer in series with the input connector to provide full electrical
isolation from the telephone system. Note that the mic input sensitivity is decreased
by 10 dB when the transformer is enabled, and this results in the mic gain control
operating over the range 0 dB to 40 dB.
The audio (or “paging”) output of the phone system should be connected to the
MIC 1 input in the normal way. The telephone input is optimised for connection to
a 600 ohm output; this should suit the majority of telephone systems. Note that the
front panel MICROPHONE LEVEL control 3 is still operational.
Outputs
Lo-Z output
The MA60/MA60media mixer-ampliers are able to deliver their rated power of
60 W into a 4 ohm load. The output power will be reduced with higher load
impedances. When using multiple low-impedance loudspeakers (normally 8 ohm) with
a single amplier, series and parallel wiring should be employed to produce a total
load impedance of not less than 4 ohm.
The low impedance output is available at the 2-pin 5 mm-pitch screw terminal connector
on the rear panel 8. Note that one of the output pins is connected internally to 0 V.
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MA60 & MA60media Installation and User Guide v1.2
100/70/50 V-line systems
An optional transformer kit (CXL-50T) is available for the MA60/MA60media, to
permit the unit to directly drive 100 V, 70 V or 50 V-line loudspeaker systems. The
transformer is rated at 50 W output, and is mounted internally. The outputs are
available on a 4-pin 5 mm-pitch screw-terminal connector which occupies the hole 9
in the rear panel normally covered by a blanking plate.
Fitting the CXL-50T transformer kit
The transformer kit comprises the following items:
• CXL-50T toroidal transformer, terminated in a PCB-mounted 4-pin connector
• M6 countersunk-head xing bolt
• Safety cover
• 2 x M3 hex pillars
• 2 x M3 x 6 screws
• Mating 4-pin connector
• 2 x cable ties
Proceed as follows:
1. Disconnect the MA60/MA60media from AC mains.
2. Take the top panel off by removing the eight M3 screws (six on the top panel
itself; two through the front panel) securing it.
3. Turn the unit upside down, and remove the plastic blanking plug from the M6
hole in the base of the unit. (The hole is in the centre of the chassis, about
8 mm behind the front panel.) Insert the M6 xing bolt supplied with the kit
through the hole.
4. Fit the transformer with the xing screw through its central core. The top of
the transformer has a threaded M6 insert; tighten the screw from underneath
using a hex key.
MA60 & MA60media Installation and User Guide v1.2
21
100/70/50 V-LINE OUTPUT
CONNECTOR PCB
Red/Brown/
Blue/Black
MAINS
TRANSFORMER
FRONT PANEL
CONTROLS PCB
CN15B
CN15A
FRONT PANEL
MAIN PCB
White/Black
CXL-50T OUTPUT
TRANSFORMER
MEDIA
PLAYER PCB
5. The primary winding of the transformer is terminated in a two-pin Molex-type
connector. This should be plugged into the header marked CN15B on the
main PCB. See “PCB layout diagrams” on page 30 for location.
6. On the rear panel, remove the plastic blanking plate covering the LINE
OUTPUT connector hole.
7. Fit the 4-pin connector on the ends of the secondary winding leads from the
transformer (the remaining four) into this hole, so that the threaded holes
in the two PCB mounting brackets line up with the two holes alongside the
connector. Use the male ends of the hex pillars (supplied) to secure the PCB
and connector in place.
8. Use the two cable ties supplied to tidy up the transformer leads; ensure that
they do not pass over the top of the main heat sink.
9. Replace the top cover, using the original screws.
10. Connect the speaker system to the line outputs using the mating connector.
Note that only two of the pins will be used; one will always be pin 1 (0 V).
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MA60 & MA60media Installation and User Guide v1.2
Connect to
CN15B
White
Black
Pri. Sec.
CXL-50T
Red
Brown
Blue
Black
Rear panel
connector
1
2
3
4
100 V
70 V
50 V
COM
To 100/70/50 V-line
speaker system
11. After plugging the connector in, the safety cover should be tted by securing it
to the female ends of the hex pillars using the two M3 screws supplied.
Important - Note that the low-impedance output should not be used once the line
output transformer is tted.
Once the transformer is tted, it is strongly recommended that the MA60/
MA60media’s 65 Hz high pass lter is set ON by moving internal jumper J13. This is
to minimise distortion due to transformer saturation at low frequencies. See “PCB
layout diagrams” on page 30 for further information regarding the internal jumpers.
Output Equalisation
Independent bass and treble EQ controls are provided for the main outputs. These
are of the preset type and are located on the rear panel 4. The treble control has a
range of ±10 dB at 10 kHz and the bass control has a range of ±10 dB at 50 Hz.
By default, this EQ adjustment affects only the music signal, but it may be enabled for
the microphone input by moving internal jumper J10, in which case the rear panel
controls will affect the both the music source and the microphone signal. See “PCB
layout diagrams” on page 30 for further information regarding the internal jumpers.
MOH/Utility output
The MOH/Utility output (MOH = Music On Hold) is an auxiliary output which
can be used as an extra output for various purposes. This is available both as a
transformer-isolated line level output and a non-isolated low-power amplier output
(approx. 1 W).
A common application for this output is to provide a continuous music-on-hold
feed to a telephone system. It should be noted that a xed LF lter reduces bass
frequencies in this output to optimise it for use with telephone systems. The lowpower output is suitable for connection to systems that require a speaker level feed.
MA60 & MA60media Installation and User Guide v1.2
23
The output connector is a 4-pin 3.5 mm-pitch screw terminal type on the rear panel
10
. Two of the pins (labelled ‘0 V’ and ‘8Ohm’) are the low-power, lo-Z output, with
one pin connected internally to 0 V. The other two pins (labelled ‘600Ohm’) are the
transfomer-isolated line level output, suitable for connection to a nominal 600 ohm
load. The output level is nominally 0 dBu, and is transformer-coupled to provide full
galvanic isolation from a telephone system.
MOH/Utility Output
600 ohm
Lo-Z loudspeaker
8 ohm
1 2 3
-
4
+
OR
8 ohm 600 ohm
1 2 3 4
To MOH input of
telephone system
Before using the MOH/Utility output with a telephone system, it is recommended
that the system manual is consulted to check suitable audio levels and any other
compatibility issues.
MOH/Utility Output level and source
The signal at the MOH/Utility output may be any required mix of the music signal and
the microphone signal, and is set using the rear panel presets MIC LEVEL control
11
and MUSIC LEVEL 12. The relevant signal level is zero with the preset control in its
fully anticlockwise position. Note that the signal at this output is NOT altered by the
front panel MUSIC LEVEL control or the rear panel MUSIC EQ preset adjustments.
Note that the MIC LEVEL control should be turned fully down if the output is used
for MOH with a telephone system, otherwise internal paging announcements will be
heard by telephone callers.
If the output is used as an auxiliary feed, it will generally need to follow the normal
music source selection. This is the factory default conguration. If Music Priority is
enabled (see “Music Priority” on page 17), the MOH/Utility output will switch to
Line 4 along with the main output if the input becomes active.
However, when in use with a telephone system as an MOH source, it is generally
more desirable for the music source to remain constant, and not vary with the front
panel MUSIC SOURCE control. For this purpose, the source for the MOH/Utility
output can be xed by moving internal jumper J6. Any of the four line inputs, or the
alternative Line 2 MP3 input 2, may be selected as the xed MOH music source. See
“PCB layout diagrams” on page 30 for further information regarding the internal
jumpers.
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MA60 & MA60media Installation and User Guide v1.2
Pre Out
To permit the connection of additional ampliers (or other equipment), a balanced
output from the MA60/MA60media’s pre-amplier section is available at a rear panel
3-pole, 3.81 mm-pitch screw terminal connector.
MA60 Pre Out:
pin 1 ground
pin 2 cold
pin 3 hot
1 2 3
SCN
-
+
MA60 Pre Out:
pin 1 ground
pin 2 cold
pin 3 hot
1 2 3
SCN
Balanced Input (e.g., XLR):
pin 1 ground
pin 2 hot
pin 3 cold
3
2
1
SCN
+-
Unbalanced Input
(e.g., phono)
SCN
+
+
All the unit’s controls and settings on the front and rear panels (levels, source selection,
priority settings, etc.) are effective at the Pre Out. However, note that neither the
switchable 65 Hz high pass lter nor the tting of an optional loudspeaker EQ card
have any effect on this output.
Music Mute Input
In some installations (such as licensed premises or retail outlets within a shopping
mall), there may be a local authority or re service requirement to mute the music
signals from a re alarm control panel when an alarm condition arises. The MA60/
MA60media includes a facility to mute the music programme only (i.e., the mic input
is still active), via the Music Mute input. This is a 2-pin 5 mm-pitch screw terminal
MA60 & MA60media Installation and User Guide v1.2
25
connector on the rear panel. The input is usually connected to a pair of isolated relay
contacts activated by the re system.
Note that the Music Mute function only mutes the MA60/MA60media’s main output;
the MOH/Utility output remains active.
When Music Mute is activated, the front panel MUTE LED 6 illuminates to conrm
that the resulting silence is due to an external Music Mute command.
Activation of the Music Mute is often via a relay mounted close to the MA60/
MA60media and any associated equipment, powered by the re alarm control panel.
Other arrangements may exist depending on the design of the re control system
and the re alarm installation company should be consulted when making the
connection. The MA60/MA60media will mute on either a contact closure at the Music
Mute input (NO) or an open circuit (NC). Selection of NO or NC operation is made
with internal jumper J15. NO is the factory default. See “PCB layout diagrams” on
page 30 for further information regarding the internal jumpers. The diagram below
shows the two connections.
Ext Standby Input
The MA60/MA60media may be remotely switched in and out of AC power standby
mode by connecting the rear panel EXT STANDBY connector 17 to an external
5 V DC source. Providing the front panel power switch 1 remains on, 5 V DC
applied across the terminals will cause the MA60/MA60media to to go into standby
mode. The 5 V source used should be able to supply 40 mA. This is a useful feature as
it permits the unit to be powered on and off from a system controller, for example.
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MA60 & MA60media Installation and User Guide v1.2
MA60media digital media player
NOTE: This section of the manual applies to the MA60media only
The MA60media includes an integral digital audio player, which can play audio
recorded as WMA or MP3 les from either USB memory devices or SD cards
plugged into their respective sockets on the front panel 8 and 9.
A standard set of “transport” controls is provided on the front panel to play, stop,
pause, etc., programme material.
The stereo audio output of the media player is mixed to (L+R) mono and routed
internally via the rear panel MEDIA/L1 switch 20 to Line Input 1. Thus to use the
media player, the rear panel switch must be set to MEDIA (button ‘in’), and the front
panel MUSIC SOURCE switch 7 set to Input 1/MEDIA.
Compatible media
USB: USB 2.0-compatible memory devices.
SD: SD cards up to 4 GB capacity, or SDHC cards up to 32 GB. MMC cards of
the same capacity are also compatible.
Filing systems supported are FAT16 or FAT32.
File types and rates supported
The MA60media will replay audio les recorded in either WMA or MP3 formats, as
follows:
WMA: bitrates from 32 kpbs to 384 kbps
MP3: MPEG 1/2/2.5, layer 2 or 3 decoding at bit rates from 32 kpbs to 384 kpbs,
including VBR.
Sample rates supported are: 8 kHz, 11.025 kHz, 12 kHz, 16 kHz, 22.05 kHz, 24 kHz,
32 kHz, 44.1 kHz and 48 kHz
Both types of audio le may be present on the memory device; the MA60media will
not differentiate between them in any way. The les may be in the root directory
of the memory, or in folders, or folders within folders. When the memory device is
plugged in, the media player will scan it and identify all compatible les in all folder
locations, and make them available for playing. Only one memory device at a time
(USB device or SD card) may be connected. Note that it is not possible to create a
playlist from the MA60media’s front panel controls.
Basic operation
MA60 & MA60media Installation and User Guide v1.2
27
The front panel transport controls operate in a similar manner to the standard
controls on, say, a CD player.
Plugging a memory device into one of the front panel sockets will activate the
player and after a short delay, the player will enter PLAY mode, conrmed by the
illumination of the PLAY LED 15. In Normal Mode (see below), the rst track played
is the one whose lename starts with the lowest numeric/alpha characters.
The track playing may be momentarily paused by pressing the H button 10; the PLAY
LED goes out and the PAUSE LED 16 illuminates to indicate this. Play is resumed
from the point at which it was paused by a further press of the H button. The track
may be stopped from either Play or Pause modes by pressing the A button 11; both
LEDs go off.
The next or previous track may be selected for immediate play by pressing the E or
F button respectively. These buttons operate in any transport mode. (Unlike a CD
player, the F button will cause the play point to jump to the start of the previous
track, not that of the current one).
Three operational modes are available, selected by the MODE button 14 (labelled
with the symbol ). Successive presses of the MODE button step through the
modes:
The REPEAT and RANDOM LEDs 18 and 17 illuminate to conrm these two modes.
Both LEDs off indicates Normal Mode.
Normal Mode
In Normal Mode, the media player plays through all the available audio les in order
of lename, regardless of which folder they are in on the memory device.
Numeric characters are given higher priority than alphabetic ones, so audio tracks
whose lenames begin with numbers will be played rst. This makes it very simple to
pre-ordain track playing order; if the tracks are given lenames beginning “01”, “02”,
etc., they will be always be played in that order in Normal Mode.
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MA60 & MA60media Installation and User Guide v1.2
Repeat mode
If Repeat Mode is enabled while a track is playing, the track will be repeated when
it has nished. This repetition will continue until Repeat Mode is cancelled. Repeat
Mode may also be selected from Stop Mode; the next track played when H is pressed
will then repeat until Repeat Mode is cancelled.
Note that Repeat Mode only applies to individual tracks; it is not possible to repeat a
sequence of tracks.
Random Mode
In Random Mode, the next track to be played is selected at random from all the tracks
available on the memory device. Note that this is not the same as the “Shufe” mode
found on portable MP3 players - a fresh random selection from all available tracks is
made at the end of each track, and thus there is a possibility that the same track may
be played twice in succession.
Appendix
Installation of speaker EQ cards
The MA60 and MA60media are compatible with single channel loudspeaker
equalisation modules. EQ modules are available from Cloud Electronics to suit the
following Bose® and Amina loudspeakers:
Bose: Panaray MA12
Panaray 402-II, 502B and 502BEX
Panaray LT Series: Models 3302, 4402, 9402 and 9702.
Amina: AIWX Series:
Models AIW1X, AIW2X, AIW3X, AIW3X/S200, AIW4X, AIW5X
LT Series:
Models LFi2T, LFi4T
Modules to suit other models are available – please enquire.
MA60 & MA60media Installation and User Guide v1.2
29
Installation Instructions
Refer to the PCB layout diagram (see “PCB layout diagrams” on page 30) for the
location of the EQ module connector and its associated bypass jumper J8.
To install an EQ module, proceed as follows:
1. Switch off the power and isolate the unit from the mains.
2. Remove the top panel.
3. Move jumper J8 on the main PCB from ‘ON’ to ‘OFF’.
4. Plug the loudspeaker equalisation module into its 12-pin connector CN16; note
that the connector has two notches on one side which engage with lugs on the
module’s mating connector to ensure correct orientation.
5. Replace the top panel.
PCB layout diagrams
The MA60 and MA60media have two PCBs which are tted with jumpers, the Main
PCB and the Input PCB. With the top cover removed from the unit, and the rear
connector panel towards you, the Main PCB is tted to the base at the rear of the
chassis, while the Input PCB is mounted vertically on the Main PCB immediately
behind the rear panel, and carries most of the connectors and controls.
The diagrams below indicate the locations of the various jumpers, and also the EQ
card socket. They are for guidance only and are not to scale.
J1
J13
(below ribbon cable)
J7
ON OFF
SWAVONC NO
J14
J15
Input PCB (vertically-mounted)
NOT TO SCALE - Only primary components shown
ONOFF
J2 J3 J4
ONOFF
ONOFFONOFF
J5
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MA60 & MA60media Installation and User Guide v1.2
CN16
ONOFF
J8
MA60 MAIN PCB
VIEW FROM REAR
CN15A CN15B
Lo-Z outputs
Loudspeaker EQ card socket
L1
MP3
(REMOVE J11
FOR 12S)
6S 3S
J6
ON OFF
J11
J12A&B
J9
J10
ONOFF
MA60 INPUT PCB
VIEW FROM FRONT
NOT TO SCALE - Only primary components
shown
SW FR
L4L3L2
SW
Table of internal jumpers and default settings
JUMPER ON PCB PURPOSE OPTIONS DEFAULT
J1 Main Mic input phantom power ON/OFF OFF
J2 Main
Mic input transformer isolation ON/OFF OFFJ3 Main
J4 Main
J5 Main Mic Access Bypass ON/OFF ON
J6 Input MOH/Utility music source SW/L1/L2/L3/L4/MP3 SW
J7 Main 100 Hz mic high-pass lter ON/OFF ON
J8 Main EQ card bypass ON/OFF ON
J9 Input Force front panel source selection FR/SW SW
J10 Input Mic EQ bypass ON/OFF ON
J11 Input L4 Priority Release Time 3 s/6 s/12 s (no jumper) 3 s
J12A Input
J12B Input
J13 Main 65 Hz high-pass lter ON/OFF OFF
J14 Main Mic priority AVO/SW/OFF AVO
J15 Main Music Mute contact type NO/NC NO
L4 Priority ON/OFF OFF
MA60 & MA60media Installation and User Guide v1.2
31
General Notes
Multi-zone applications
MP3
Where the sound system specication
calls for separate control in several zones,
MA60s and/or MA60medias can be used
in multiples. These notes discuss the
principle of connecting external input
sources to several units in parallel. Note
that the integral media player in any one
MA60media will only play in the zone to
which its output is connected. However,
its Pre Out may be connected to the Line
Inputs of additional units (Line 1 would
be the logical choice), so that one media
player can act as an external source for
the other units.
Signal sources can be connected to several
inputs as required, but care must be taken
to ensure the output stage of the signal
source is capable of driving the resulting
lower input impedance. The impedance of
the line inputs (music inputs) is 47k ohm
and it is reasonable to assume that most
op-amp based signal sources are easily
able to drive a 10k ohm load, allowing up
to ve MA60/MA60medias to be paralleled.
The input impedance of the mic input
is more than 2k ohm, making it suitable
for microphones with a nominal impedance of 600 ohms or less. A single 600 ohm
microphone could therefore typically be connected to four paralleled mic inputs. If
this guideline gure cannot be adhered to, the use of suitable mic or line distribution
ampliers is recommended.
DOCK
CD
PLAYER
TV
TUNER
JUKEBOX
ADDITIONAL MA60s
MAIN OUT
1
LINE INPUTS
2
3
4
MA60MEDIA
PRE OUT
MIC INPUT
1
LINE INPUTS
MAIN OUT
2
3
4
MA60MEDIA
1
LINE INPUTS
2
MAIN OUT
3
4
MA60MEDIA
To avoid any problems associated with differences in mains supply earthing, we
recommend that all MA60/MA60medias used in a multi-zone application should be
co-located and connected to a common mains supply. Note that when using multiple
MA60/MA60medias in a 19” rack, suitable ventilation arrangements must be made to
ensure that lower units do not cause those above to overheat (see also “Ventilation”
on page 16).
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MA60 & MA60media Installation and User Guide v1.2
EMC considerations
MA60 and MA60media mixer-ampliers fully conform to the relevant electromagnetic
compatibility (EMC) standards and are technically well behaved. You should
experience no problems interfacing units to other items of equipment and under
normal circumstances, no special precautions need to be taken. If the unit is to be
used in close proximity to potential sources of HF disturbance such as high power
communication transmitters, radar stations and the like, it is suggested that input
signal leads be kept as short as possible. Always use balanced interconnections
wherever possible. If the MA60/MA60media mixer-amplier is mounted in a 19” rack,
do not locate the unit in close proximity to a powerful amplier of any kind, which
may radiate a strong magnetic eld from the power transformer.
Earthing
When several mains powered units are connected together via their signal cables,
there is a risk of one or more earth loops which may cause an audible hum
on the system even with the gain controls set to minimum. The 0 V rail of an
MA60/MA60media mixer-amplier is directly coupled to the chassis ground. No
interconnection problems should be encountered, but if there is any hum or other
extraneous noise when source equipment is connected, the situation can generally be
remedied by observing the following guidelines:
• Always connect sources using balanced connections wherever possible. Note
that, for EMC reasons, the cable screen should be connected at both ends.
• Use audio isolating transformers (readily available from trade suppliers) at the
inputs if necessary. These will ensure that the amplier is electrically isolated from
the source equipment.
• The signal source units should be located as close as possible to the ampliers
and the metal housing of the various units should not be electrically connected
together through the equipment rack. If this is a problem, rack isolating kits
are available from specialist hardware suppliers. If the problem persists, try to
connect all interconnected units, including power ampliers to a common power
source to ensure a common ground is provided.
MA60 & MA60media Installation and User Guide v1.2
33
Technical specications
Line inputs
Low-Z output: +0 dB/-1 dB from 20 Hz – 20 kHz (65 Hz lter out)
Frequency response
Distortion
Sensitivity 195 mV (-12 dBu) to 2.0 V (+8 dBu)
Input Gain control 20 dB range
Input impedance 47k ohms
Headroom >20 dB
Noise -93 dB, 22 Hz –22 kHz, at speaker output, relative to full power
Microphone Inputs
100/70/50 V-line outputs (with CXL-50T transformer tted): +0 dB/-3 dB
from 20 Hz – 20 kHz (65 Hz lter switched out)
Low-Z output: <0.05% @ 1 kHz, 1 dB below full power (80 kHz bandwidth)
High voltage output: <0.05% @ 1 kHz, 1 dB below full power (80 kHz
bandwidth)
Frequency response
Distortion <0.05% @ 1 kHz, 1 dB below full power (80 kHz bandwidth)
Gain range 40 dB range
Input Impedance >2k ohms (balanced)
Phantom Power 15 V, switchable per-input by jumpers
Headroom >20 dB
Noise -127 dB EIN 22 Hz-22 kHz (150 W)
Low-Z output: -3 dB @ 100 Hz (3rd. order lter); -1 dB @20 kHz
High voltage output: -3 dB @ 100 Hz (3rd. order lter); -2 dB @20 kHz
Outputs
60 watts @ 1 kHz & <0.07% THD+N Low impedance output
Output Power
Equalisation HF: ±10 dB/5 kHz LF: ±10 dB/100 Hz
Protection
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MA60 & MA60media Installation and User Guide v1.2
50 watts @ 1 kHz & <0.07% THD+N 50/70/100V line outputs (optional
transformer tted)
Dynamic level signal limiter max gain reduction of 20 dB, thermal protection,
IV limiting & short circuit protection, switch on delay
General specications
Power input 230 V, 115 V versions available
Fuse rating 230/120 V - T2A H
Fuse type 20 mm x 5 mm
Cooling Convection cooled, vents top and bottom.
Dimensions (mm) 213.0 wide x 88 high (2U) x 278 deep (+ connectors & knobs)
Net weight
4.65 kg (with CXL-50T transformer)
3.5 kg (without CXL-50T transformer)
MA60 & MA60media Installation and User Guide v1.2
35
Cloud Electronics Limited
140 Staniforth Road
Shefeld S9 3HF
England
Tel: +44 (0)114 244 7051
Fax: +44 (0)114 242 5462
email: info@cloud.co.uk
web: www.cloud.co.uk
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