Cloud mpa120 Manual

CLOUD MPA Series Mixer-Amplifiers

General Description

The Cloud MPA Series is intended to provide a complete audio
solution for Houses of Worship, retail outlets, hotels, licensed
premises and other spaces where music, announcements and/or
flexible paging are required. It combines the functions of a four-
channel microphone mixer with full paging facilities, a six-input music
source selector and a mono power amplifier in a single 2U unit.
There are two models in the MPA range, which differ only in the
rated power of the amplifier stage:
• MPA120 120 watts
• MPA240 240 watts
(all ratings are into 4 ohms)
The MPA mixer-amplifiers have six unbalanced stereo line inputs
for music sources, and four balanced microphone inputs. Each
microphone input has its own rear panel sensitivity control and front
panel gain control, allowing multiple mics to be mixed together. Each
line input has a rear panel sensitivity control; the required music
source is selected by a front panel rotary switch and the volume is
also adjusted on the front panel. The selected music source is mixed
with the summed mic signals before being fed to the power amplifier
stage.
The MPA Series is compatible with the Cloud PM1 single-zone paging
microphone, and may also be used for one of the zones supported by
the Cloud PM4/8/12/16/4-SA/8-SA multizone paging microphones.
Alternatively, Mic 1 input may be configured to suit most OEM paging
systems; paging is activated by a short-to-ground access connection,
and Mic 1 may be configured to have automatic priority over the
other mic inputs to prevent announcement clashes. Mic inputs may
Every Cloud product is exhaustively tested for electronic performance and sonic perfection in Sheffield, England.
482.6 mm
19"
All Cloud products are exclusively designed in the UK.
MPA Series - front panel view (MPA240 illustrated)
MPA Series - rear panel view (MPA240 illustrated)
be selected to have automatic priority over the selected music
source, and additionally, Line Input 6 may be set to have priority over
any other selected to facilitate connection of a digital sound store
or similar device. A pre-announcement chime may also be enabled at
installation. Mic 1 may be configured as a galvanically-isolated input
for connection to (compatible) telephone systems, to permit paging
to take place from any telephone extension.
A range of EQ cards to match the MPA Series to various popular
installed-audio loudspeakers is available.
A 100/70/25 V-line transformer is fitted as standard, and the output
stage drives high-impedance line loudspeaker distribution systems
directly. An internal jumper allows the transformer to be disabled,
permitting the amplifier to be used to drive low-impedance
loudspeakers.
In addition to the main output, there is an MOH/Utility Output
available as both an unbalanced line level signal and as a fully-isolated
output suitable for driving the Music On Hold input of a telephone
system. The music source at this output can follow the front panel
music source selection or be fixed to Line 6, and the music/mic
mix may be adjusted independently. A separate, balanced line level
"Pre Out" output is also provided to facilitate the connection of
additional power amplifiers.
Music level only, or music level and source selection may be
controlled remotely if wished, using standard Cloud remote control
plates.
In common with most Cloud products, a Music Mute Input is
provided, which may permit compliance with local Fire Authority
regulations; the microphone inputs remain active when the Music
Mute is applied.
C l e a r l y b e t t e r s o u n d