Cloud MA40 User manual

MA40 Installation and User Guide v1.0
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MA40
Mini Amplier
Installation and User Guide

MA40 Installation and User Guide v1.0
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WARNING:
To reduce the risk of re or electric shock, do not expose this appliance to rain or
moisture.
WARNING:SHOCK HAZARD – DO NOT OPEN
AVIS: RISQUE DE CHOC ELECTRIQUE – 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 sufcient 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.

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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 ampliers) that produce heat.
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 specied by the manufacturer.
12. Use only with the cart, stand, tripod, bracket or table specied by
the manufacturer or sold with the apparatus, when a cart is used,
use caution when moving the cart/apparatus combination to avoid
injury from tip-over.
13. Unplug this apparatus during lightning storms or when unused for long periods
of time.
14. Refer all servicing to qualied 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.

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Do not expose the apparatus to dripping or splashing, and ensure that
no objects lled with water, 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’objet.
The mains plug is used as the disconnect device and it should remain
readily accessible during intended use. In order to 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.
Terminals marked with the symbol may use Class 2 Wiring, but
voltages at these terminals may be of sufcient 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.

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Contents
IMPORTANT SAFETY INSTRUCTIONS ..........................................3
SAFETY INFORMATION ....................................................................7
Safety Notes regarding Installation........................................................................ 7
Conformities .............................................................................................................. 7
RoSH and WEEE declaration .............................................................................. 8
Safety Considerations and Information................................................................ 9
Mains Fuse ............................................................................................................. 9
Servicing .................................................................................................................. 9
OVERVIEW..........................................................................................10
Introduction.............................................................................................................. 10
Applicable Models................................................................................................... 10
MA40 main features................................................................................................ 11
What’s in the Box ................................................................................................... 11
BLOCK DIAGRAM .............................................................................12
FRONT PANEL DESCRIPTION .......................................................13
REAR PANEL DESCRIPTION...........................................................14
INSTALLATION..................................................................................15
Mechanical ................................................................................................................ 15
Ventilation ................................................................................................................. 16
Connections and adjustments.............................................................................. 17
Line inputs............................................................................................................. 17
Sensitivity & Gain Control.............................................................................. 18
Music Level and EQ control........................................................................... 18
Line 1 Priority.................................................................................................... 18
Mic inputs.............................................................................................................. 19
Mic gain adjustment.......................................................................................... 19
Microphone level control................................................................................ 20
Mic EQ ................................................................................................................ 20
Microphone priority......................................................................................... 20
Output ................................................................................................................... 20

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Remote Control.................................................................................................. 21
Connecting an RL-1 Series remote control plate ..................................... 22
Control of music source and level via external DC ................................. 22
Music Mute Input................................................................................................. 23
Auto Power Down.............................................................................................. 24
Loudspeaker EQ cards....................................................................................... 24
Installation Instructions ................................................................................... 24
APPENDIX ..........................................................................................25
PCB layout diagram................................................................................................. 25
Table of internal jumpers and default settings .............................................. 25
Summary of rear panel DIP switch functions ................................................... 26
EMC considerations ............................................................................................... 27
Earthing...................................................................................................................... 27
Technical specications .......................................................................................... 28

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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 qualied to do so and
fully understand the hazards associated with mains-operated equipment.
• The unit has no user-serviceable parts. Refer servicing to qualied 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 unit 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 standards:
BS EN 60065:2002 (+A2:2010)
UL60065
This product is compliant with the relevant provisions of:
Energy Star® Eligibility Criteria Ver 3.0 for Audio-Video products.

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RoSH and WEEE declaration
Cloud Electronics Limited manages its business and collaborates with its suppliers
to comply with the European Union restriction of the use of certain hazardous
substances in electrical and electronic equipment, RoSH Directive (2002/95/EC),
that came into force on 1st July 2006, and similar restrictions in other jurisdictions.
The “crossed out wheelie bin” symbol on the product and represented
above is there to remind users of the obligation of selective collection
of waste. This label is applied to various products to indicate that the
product is not to be thrown away as unsorted municipal waste. At the
end of life, dispose of this product by returning it to the point of sale or
to your local municipal collection point for recycling of electric and electronic
devices.
Customer participation is important to minimize the potential effects on the
environment and human health that can result from hazardous substances that may
be contained in this product.
Please dispose of this product and its packaging in accordance with local and national
disposal regulations, including those governing the recovery and recycling of waste
electrical and electronic equipment. Contact your local waste administration, waste
collection company or dealer.

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Safety Considerations and Information
The MA40 is powered by an external DC supply. A separate Power Supply Unit
(PSU) is supplied with the amplier. The PSU must be earthed. Ensure that the mains
power supply provides an effective earth connection using a three-wire termination.
Mains Fuse
The PSU is a sealed unit and contains no user-replaceable fuses. Mains over-current
protection is provided by the fuse in the AC mains plug, which should be rated at
5 A.
Servicing
The unit contains no user serviceable parts. Refer servicing to qualied service
personnel. Do not perform servicing unless you are qualied 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. Only reassemble the unit using
either the original bolts/screws, or ones identical to the original parts

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OVERVIEW
Introduction
The MA40 is a very compact mono amplier designed for integration into audio
and AV systems where de-centralised installation is advantageous. It is intended
as an “install-and-forget” component, and is small enough to be tted into wall or
ceiling voids or in any convenient location adjacent to projectors, at screen displays
or loudspeakers. A simple set of controls and conguration options makes it easy
to integrate into any audio system. It is highly suitable for use with in-store digital
signage, gallery and museum exhibits and xed or mobile tour guide systems.
The MA40 can deliver 40 W (mono) into a 4 ohm load. It has two unbalanced
stereo inputs for line level signals (typically music sources) and a balanced mic input
for announcements, etc. Front panel preset-type controls are provided for music
levels, music EQ and microphone level. There are also various preset adjustments
and conguration DIP switches on the rear panel, and jumpers mounted internally
on the main PCB. A Cloud RL Series remote level control plate can be wired to
the rear panel RL-1 connector; this connector also allows audio volume control by
a third-party control system (e.g., Crestron, AMX, etc.) using a DC voltage in the
range 0 – 10 V.
Applicable Models
This Installation Guide describes the installation and operation of the following
model only:
• Cloud MA40 40 W mono amplier for 4 ohm loudspeakers
NOTE: Amplier models MA40F, MA40T and MA40E are NOT covered by this
Guide, and when installing any of these models, reference should only be made to
the Guides specic to them.