Ecler ALMA24, User Manual

Page: 7 / 21

7
INSTALLATION
The ALMA24 can be mounted in a standard 19” rack (482.6 mm) taking up one height
unit (44 mm).
For professional use it is recommended to place the processor in the same rack as the
power amplifiers.
Given the small power consumption of the unit, no ventilation is required. Nevertheless,
it is advisable not to expose the unit to extreme temperatures as well as ensure a dry
and dust-free operating environment.
It is important not to place the processor next to electrical noise sources such as
transformers, voltage dimmers, motors, etc. or their mains supply cables. The metal cover
of the device should never be removed under any circumstance for that same reason.
The ALMA24 operates with alternate current (AC) between 100 and 240V at 47 to 63Hz.
This device features an oversized power supply which adapts itself to any mains voltage
around the world, without the need of manual adjustment.
Even though the noise produced by powering up is minimum, it is always advisable to
follow this power up sequence: signal sources, mixing unit, processor and, finally, power
amplifiers. The power down sequence must follow exactly a reverse order. By closely
following these sequences, all peaks or transients produced by switching on and off
devices do not affect the next devices in the chain and, of course, never reach the
loudspeakers, which are extremely sensitive about this.
6.1 Ground Loops
Care should be taken, so that the different mechanical and electrical grounds, as well as
the chassis and ground connections arriving to the device, to be independent from each
other.
Ground loops can be easily detected through a low frequency hum noise (50Hz).
Depending on the level of this noise, it can interfere on the music quality.
6.2 Audio connections
Usually, many people do not care enough about the quality of cables. Many times,
because of a bad connection or bad quality cables, there can be important problems
during the music reproduction.