24 Series Installation and User Guide V1.0
7
OVERVIEW
Introduction
The Cloud 24 Series are two-zone audio mixer-ampliers,
with applications in Licensed, Retail, Leisure and similar
venues.
Two models are available to suit different output power
requirements (2 x 120 or 2 x 240 watts). Otherwise the
models have almost identical facilities.
The mixer-ampliers have inputs for four stereo line signals
and a microphone signal. Front panel controls are provided
for music source selection, music level and microphone level
in each of the two zones. 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 conguration options are selectable
using rear panel DIP switches. Certain installation options are
set using internal PCB jumpers.
The units are compatible with standard Cloud remote control
plates from the RL and RSL Series, and may also be remotely
control using RS-232 serial commands.
Applicable Models
This Installation and User Guide describes the installation
and operation of the following models:
Cloud 24-120: 2 x 120 W mono mixer-amplier
for 4 or 8 ohm loudspeakers, or 70/100 V-line
loudspeaker systems
Cloud 24-240: 2 x 240 W mono mixer-amplier
for 4 or 8 ohm loudspeakers, or 70/100 V-line
loudspeaker systems
All references to “24 Series” throughout this Installation and
User Guide may be taken as being applicable to either model.
24 Series main features
• Provides amplication for two zones, with simple per-zone
control of music, mic sources and paging in a single unit
• Available in two versions, with output power ratings of 120
or 240 W per zone
• Transformerless output stages: can be congured to drive
either 70/100 V-line systems directly, or low impedance
loudspeakers (4/8 ohms)
• Model 24-120 permits power sharing in Hi-Z mode:
maximum available power of 240 W may be shared as
required between the two channels
• Front panel controls for music source, music level and mic
level in each zone
• Two unbalanced and two balanced stereo line inputs, with
individual gain trim controls
• Balanced mic input; 12 V phantom power available
• 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
• Separate HF/LF EQ adjustments (rear panel) for mic signals
and music source
• Paging control of Mic input via short-to-ground access
connection for each zone
• Selectable VOX mic-over-music priority
• Selectable LINE 4 priority
• 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-4/RSL-6 Series (music
level and source selection)
• RS-232 serial control port; protocol includes global and
per-zone functions
• Power amplier protection circuitry
• Power amplier input limiters
• Switchable 65 Hz high-pass lter (per-zone): reduces
transformer saturation in 70/100 V-line systems
• Balanced Utility output with separate rear panel controls
for music/mic mix: music source can follow Zone 1
selection or be permanently LINE 1
• Per-zone auxiliary output from pre-amp (balanced, line
level)
• Automatic power-down function (user-selectable)
• Thermostatically-controlled forced-air cooling
• 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 Series paging mics