Cloud Electronics 44/50 - Manual (Page 4)

44/50: Installation and Operation Manual 3
4 Installation
The Cloud 44/50 is suitable for mounting in a standard 19" equipment rack and occupies
two units of rack space. Sufficient ventilation should be provided particularly where it is
required to deliver a high output power for long periods of time; the unit draws cool air
through the front panel and exhausts through the rear panel. The 44/50 is 300mm deep
but a depth of 375mm should be allowed to clear connectors.
5 Music Inputs
The 44/50 operates in mono but is fitted with four stereo line inputs, which are internally
mixed to form a mono signal. 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 47k
Ω
.
6 Sensitivity & Gain Control
All four 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 44/50 and the music level controls have an optimum range of control.
7 Music Control - Local or Remote
The music source and music level control functions can be operated from the front panel,
or remotely when the optional REM-4 plug-in four channel remote control module is fitted
and wired to a maximum of four RSL-1 control plates. This plate can be positioned up to
100 metres from the 44/50 and 2-core cable with overall screen should be used. Self-
adhesive labels are provided to identify the signal source on both the 44/50 front panel
and the RSL-1. The front panel mounted music level controls can be defeated if required,
please refer to section 27 for full details. If preferred, the music source can be controlled
from the 44/50 front panel with the music level only controlled remotely using the RL-1
remote level control. See section 21 for REM-4 fitting instructions and section 24 for
remote level plate installation requirements.
8 Music Equalisation
Separate treble and bass controls are provided for music signals only on each of the four
zones. This arrangement allows the installer to optimise the response of the music
signals on a zone by zone basis where different acoustic properties require optimal
equalisation adjustment. The equalisation controls are concealed behind the removable
control panel secured to the front panel. Using the supplied Allen key, remove the four
Allen cap screws which retain the control panel; the HF and LF equalisation controls are
clearly marked and located below the music controls for the relevant zone. A flat
frequency response can be achieved by positioning the slot on the control shaft in the
horizontal plane. The music treble control (HF) has a range of
±
10dB at 10kHz and the
music bass control operates with a range of
±
10dB at 50Hz.