Cloud Electronics CXV-225 User Manual
CXV-225 & CXV-425
AMPLIFIERS
Installation and User Guide
Contents
Safety Information ........................................ 4
Safety Notes Regarding Installation .......................4
Conformities ...............................................................4
Safety Considerations and Information ................4
General Description ...................................... 5
Applicable Models ...................................................... 5
Schematic Diagram ...................................... 5
Front Panel Description ............................... 6
Rear Panel Description ................................. 7
Installation ..................................................... 8
Mechanical ................................................................... 8
Ventilation .................................................................... 8
Connections and Adjustments ................................8
Inputs ............................................................................ 8
Sensitivity and Gain Control ................................8
Input Routing ...........................................................8
Remote Control of Level ......................................9
Outputs ........................................................................9
Protection...............................................................10
High Pass Filters ....................................................10
VCA Cards (optional) .............................................10
Installation .............................................................10
BOSE® Equalisation Modules (Optional) ...........11
Installation ..............................................................11
General Notes ............................................. 11
EMC Considerations ...............................................11
Earthing ......................................................................11
Technical Specications .............................. 12
General Specications ................................ 12
Location of Internal Jumpers and
Connectors. .................................................. 13
CXV-225 connector and jumper details .............13
CXV-425 connector and jumper details .............14
CXV-225 & CXV-425 User Manual v1.0 3
CXV-225 & CXV-425 User Manual v1.04
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 servicing •
to qualied service personnel.
Safety Considerations and Information
The unit must be earthed. Ensure that the mains power
supply provides an effective earth connection using a threewire 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 Fuse
Replace the mains fuse only with the same type and rating as
marked on the rear panel.
The fuse body size is 20 mm x 5 mm.
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 55103-1:1997
BS EN 55103-2:1997
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 60065:2002
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.
Only reassemble the unit using bolts/screws identical to the
original parts.
The CXV Series was developed and manufactured with high
quality materials and components, which can be recycled
and/or reused.
CXV-225 & CXV-425 User Manual v1.0 5
General Description
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LEVEL
LEVEL
LEVEL
LEVEL
FREQ
FREQ
FREQ
FREQ
VCA
VCA
VCA
VCA
SPEAKER
EQ
SPEAKER
EQ
SPEAKER
EQ
SPEAKER
EQ
CLIP
LIMITER
CLIP
LIMITER
CLIP
LIMITER
CLIP
LIMITER
PROTECT
PROTECT
PROTECT
PROTECT
OUTPUTS
J4
J3
J2
J1
CHANNEL.
POWER
AMPLIFIER
POWER
AMPLIFIER
POWER
AMPLIFIER
POWER
AMPLIFIER
CXV-225
CXV-425
fig.1: CXV Series schematic diagram
The Cloud CXV-225 and CXV-425 are high power
(250 W/ch), multi-channel audio ampliers intended for use
with high quality PA and background music systems in ofces,
hotels, factories, leisure facilities and other commercial and
industrial premises.
They are designed to drive 100 V line speaker systems
directly, and have no low-impedance outputs. Low impedance
loudspeakers can only be connected to these ampliers
with the use of an intermediate 100 V line transformer.
Loudspeakers designed for such ‘installed-sound’ applications
will normally include an integral transformer, typically with
selectable output power taps. If you have any doubt about
the suitability of this amplier for the speaker system it is to
be connected to, please verify that the speakers are of the
100 V line type with the manufacturer.
Unlike traditional 100 V line amplier designs, the CXV-225
and CXV-425 do not employ an output transformer. This
produces a considerable saving in weight and a signicant
improvement in audio quality.
Applicable Models
This manual describes the installation and operation of the
following models:
Cloud CXV-225 2-channel amplier – •
2 x 250 W, 2U 19” rack unit
Cloud CXV-425 4-channel amplier – •
4 x 250 W, 3U 19” rack unit
Apart from the number of channels and the units’ physical
dimensions and power consumption gures, the two
models are otherwise identical for the practical purposes of
installation and operation.
Schematic Diagram
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