Cloud MPA MK2 Series, MPA240 MK2, MPA120 MK2 Installation And User Manual

MPA MK2 SERIES

SINGLE ZONE MIXER-AMPLIFIERS

Installation and User Guide

MPA MK2 Installation and User Guide V1.0

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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MPA MK2 Installation and User Guide V1.0

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.

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 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 isolate the apparatus from the mains, the mains plug should be completely removed form the mains outlet
socket.

Le prise du secteur ne doit pas être obstruée ou doit être facilement accessible pendant son utilisation. Pour être

complètement déconnnecté de l’alimentation d’entrée, la prise doit être débranchée du secteur.

This apparatus is of Class 1 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 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.

MPA MK2 Installation and User Guide V1.0

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Energy Efciency Certication

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MPA MK2 Installation and User Guide V1.0

The Cloud MPA120 MK2 and MPA240 MK2 Mixer-ampliers have been designed to meet the relevant
provisions of the US Environmental Protection Agency’s ENERGY STAR® Program.

The ENERGY STAR Program exists to identify products that contribute to the saving of energy and
the reduction of harmful emissions, thereby both saving you money and protecting the environment.

ENERGY STAR certication is your assurance that this product is energy efcient. You can verify its inclusion in the ENERGY
STAR Program at:

https://www.energystar.gov/productnder/product/certied-audio-video/results

MPA MK2 Installation and User Guide V1.0

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Contents

IMPORTANT SAFETY INSTRUCTIONS ................................................................................................................. 3

Energy Efciency Certication ......................................................................................................................................... 4

SAFETY INFORMATION .......................................................................................................................................... 8

Safety Notes regarding Installation ................................................................................................................................ 8

Conformities ........................................................................................................................................................................... 8

RoHS and WEEE declaration .......................................................................................................................................... 8

Safety Considerations and Information ......................................................................................................................... 8

Caution – High Voltage ................................................................................................................................................... 8

Caution – Mains Fuse ....................................................................................................................................................... 8

Caution – Servicing ........................................................................................................................................................... 8

OVERVIEW ................................................................................................................................................................ 9

Introduction ............................................................................................................................................................................ 9

Applicable Models ................................................................................................................................................................. 9

MPA MK2 Series main features ........................................................................................................................................ 9

What’s in the box ................................................................................................................................................................10

Schematic Diagram ............................................................................................................................................................ 11

Front panel description ..................................................................................................................................................... 12

Rear panel description .......................................................................................................................................................13

INSTALLATION ....................................................................................................................................................... 15

Hardware considerations ..................................................................................................................................................15

Ventilation ............................................................................................................................................................................15

Power Supply ........................................................................................................................................................................15

Fuses and ratings .............................................................................................................................................................15

Connections and Controls ................................................................................................................................... 16

Music Inputs .........................................................................................................................................................................16

Sensitivity & Gain Control ............................................................................................................................................16

Music Source Select .......................................................................................................................................................16

Music Level Control ....................................................................................................................................................... 16

Remote Control of Music Source and Level ........................................................................................................... 16

Music Equalisation .........................................................................................................................................................17

Music Priority ...................................................................................................................................................................17

Microphone Inputs ..............................................................................................................................................................17

Gain Control .....................................................................................................................................................................18

Microphone level control ..............................................................................................................................................18

Microphone Equalisation .............................................................................................................................................18

Paging control and mic priority ...................................................................................................................................... 19

Microphone Access Input .............................................................................................................................................. 19

Mic 1-over-Mic 2 priority ............................................................................................................................................19

Outputs ..................................................................................................................................................................20

Speaker Output ............................................................................................................................................................... 20

Connecting to Lo-Z loudspeakers ...............................................................................................................................20

Connecting to 70/100 V-line systems ......................................................................................................................20

Auxiliary Output ..............................................................................................................................................................21

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MPA MK2 Installation and User Guide V1.0

Facility Port ............................................................................................................................................................21

Connecting an active remote module .......................................................................................................................... 22

Music Mute (Fire Alarm Interface) ......................................................................................................................23

Auto Power Down ..............................................................................................................................................................23

Options and Additional Information ............................................................................................................................23

Multi-zone Applications ................................................................................................................................................23

Control of music source and level

via external DC .................................................................................................................................................................23

Using the Facility Port as an auxiliary input ...........................................................................................................24

APPENDIX ................................................................................................................................................................25

PCB jumper locations .........................................................................................................................................................25

Table of internal jumpers and default settings ......................................................................................................26

Troubleshooting ..................................................................................................................................................................27

EMC Considerations ..........................................................................................................................................................27

Earthing .................................................................................................................................................................................27

TECHNICAL SPECIFICATIONS .............................................................................................................................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.

TThe “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.

• 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 55035:2017 (Immunity)

BS EN 55032:2015 (Emissions)

BS EN 6100-3-2:2-14 (Harmonics)

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 standard:

BS EN 62368-1:2014

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.

Safety Considerations and Information

The unit must be earthed. Ensure that the mains power
supply provides an effective earth connection using a three­wire termination.

Caution – High Voltage

Do not touch any part or terminal carrying the hazardous live
symbol while power is applied to the unit. Terminals to

which the hazardous live symbol refers require installation by
a qualied person.

Caution – Mains Fuse

The MPA MK2 contains no user-replaceable fuses. Mains
over-current protection is provided by the fuse in the IEC
receptacle; only replace this fuse with one of an identical
type and rating.

If the replacement fuse blows immediately it indicates that
the mixer amplier has developed a fault, which should be
referred to competent service personnel.

This product is compliant with the relevant provisions of

Energy Star® Eligibility Criteria Ver 3.0 for Audio­Video products.

RoHS 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, RoHS Directive
(2002/95/EC), that came into force on 1st July 2006, and
similar restrictions in other jurisdictions.

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MPA MK2 Installation and User Guide V1.0

Caution – Servicing

The unit contains no user-serviceable parts. Refer servicing to
qualied 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 bolts/screws identical to the original parts.

OVERVIEW

• Separate HF/LF EQ adjustments (rear panel) for mic signals
and music source

Introduction

The Cloud MPA MK2 Series are audio mixer-ampliers with
applications in Licensed, Retail, Leisure and similar venues.

Two models are available to suit different output power
requirements (120 or 240 watts); otherwise the models have
identical facilities.

The mixer-ampliers have inputs for six stereo line signals and
two microphone signals. Front panel controls are provided for
music source selection, music level and microphone levels. A
multi-function Facility Port allows the connection of remote
active input modules.

An extensive selection of pre-set controls is located on the
rear panel; primary unit conguration options are selectable
using rear panel DIP switches. Certain installation options are
set using internal PCB jumpers.

The units are also compatible with standard Cloud remote
control plates from the RL and RSL Series.

Applicable Models

This Installation and User Guide describes the installation
and operation of the following models:

 Cloud MPA120 MK2: 120 W mono amplier for 4

ohm loudspeakers or 100/70 V-line loudspeaker
systems

 Cloud MPA240 MK2: 240 W mono amplier for 4

ohm loudspeakers or 100/70 V-line loudspeaker
systems

All references to “MPA MK2” throughout this Installation and
User Guide may be taken as being applicable to both models.

• Paging control on Mic 1 input via short-to-ground access
connection

• Mic 1 congurable as high-voltage input for paging from
existing 70/100 V-line system

• High-voltage input alternatively selectable to Line 5
input: permits existing background music to be routed via
MPA MK2

• Selectable VOX mic-over-music priority on all mic Inputs

• Automatic Mic 1-over-Mic 2 priority in Page mode; may be

overridden by internal jumper

• Selectable LINE 6 priority with choice of release times

• Selectable pre-announcement chime

• Music Mute control input (N/O and N/C) for interface to

an emergency system

• Facility port for connection of LM-2, L-1 or M-1 remote
input modules via screened Cat 5 cable; LM-2 also allows
remote control of music level and line input selection

• Facility Port supports BT-1 Bluetooth input module

• Compatible with standard Cloud remote control plates:

RL-1 Series (music level) and RSL-6 Series (music level and
source selection)

• Power amplier protection circuitry

• Power amplier input limiter

• Transformerless output stage can be congured to drive

either 70/100 V-line systems directly, or low impedance
loudspeakers (4/8 ohms)

• Switchable 65 Hz low-pass lter: reduces transformer
saturation in 70/100 V-line systems

• Aux output from pre-amp (balanced, line level)

MPA MK2 Series main features

• Provide amplication and simple control of music, mic
sources and paging in a single unit

• Two versions: output power ratings of 120 or 240 W

• Integral two-channel microphone mixer with per-input

sensitivity adjustment

• Front panel controls for music source, music level and level
of each mic input

• Six (unbalanced) stereo line inputs with individual
sensitivity adjustment

• Two balanced mic inputs – 12 V phantom power available
on either or both

• Fixed 100 Hz hi-pass mic channel lter

• Separate microphone limiter circuit to prevent power stage

limiter from ducking music signal in the presence of high
mic levels

• Automatic power-down function (user-selectable)

• ENERGY STAR Certication applied for

• Convection cooled (MPA120 MK2); forced-air cooling with

variable speed control (MPA240 MK2)

• 1U 19” rack mounting unit

Available Options:

• LM-2 remote active mic/line input module with music
source selection and volume controls

• BT-1 remote Bluetooth wireless audio input module

• L-1 remote active line input module

• M-1 remote active mic input module

• RL Series remote control plates for music volume

• RSL Series remote control plates for music source selection

and level

• PM-1 single zone paging mic

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