Cloud 36-50 MULTI-ZONE Installation & Operation Manual - Page 4

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36/50: Installation and Operation Manual

Installation

The Cloud 36/50 is suitable for mounting in a standard 19" equipment rack and occupies two

units of rack space. Sufficient ventilation should be provided particularly where the unit is

required to deliver a high output power for a long period of time. The cooling is provided by

convection and the airflow through the ventilation slots must not be obstructed. In rack

mounting applications we recommend that 1U of space is left both above and below the unit,

though this may not be necessary if other equipment directly above and below the unit does

not cover the ventilation slots. In free standing applications the feet supplied should be fitted,

the unit stood on a flat surface and precautions should be taken to ensure that items will not

be placed on top of the unit that may cover the ventilation slots. The 36/50 is 300mm deep

but a depth of 375mm should be allowed to clear connectors.

Music Inputs

The 36/50 operates in mono but is fitted with six stereo line inputs, which are internally mixed

to form mono signals. The line inputs are suitable for most music sources such as compact

disc players, tape players and receivers etc. All the inputs are unbalanced and use RCA type

phono sockets. The input impedance is 47kΩ.

Sensitivity & Gain Control

All six line inputs have a pre-set gain control on the rear panel adjacent to the respective

input sockets. The input sensitivity can be varied from -12dBu (195mV) to +8dBu (2.0V). The

pre-set gain controls should be set so that all the input signals operate at the same level

within the unit and the music level controls have an optimum range of control. For nominal

operating levels the figure below gives a rough guide to settings for

typical equipment, though as there is little in the way of standards

for the output levels of CD players, tape players etc It is likely that

some experimentation will be needed to find precisely the right

levels. When setting the gain controls to achieve the maximum

output level it should be noted that the unit has clip limiters on all the

power amplifier sections. These clip limiters can give a false

impression of the signal level, allowing the user to set the input gain

controls to inappropriately high levels without noticeable clipping.

Music Control - Local or Remote

The music source and music level

control functions can be controlled from

either the front panel, or a remote

control plate located up to 100m from

the 36/50. There are two remote

control plates available for the 36/50

the RSL-6 and the RL-1. The RSL-6

should be used when remote control of

music source and music level is

required whereas the RL-1 can be used

when the application calls for remote

control of the level only (source

selection via front panel). RSL-6 and

RL-1 remote control plates can be

mounted onto a standard British flush

or surface mounted 25mm deep back

box. Two-core cable with overall

screen should be used to connect the

remote controls to the Cloud 36/50, the

diagrams to the right show how to

connect the two remote plates.

See section 21 for installation details.

06/12/02 V5.0

Typical Gain Settings