Switch On/Off; Level Controls - D.A.S. CSA Serie Manual Del Usuario

Cooling
A fan cools the aluminium heat sinks from back to front.
When mounting the unit onto a 19-inch rack, a rack cooling
system is not required, since the air is exhausted out through
the front grille. However, the rack must not be sealed, and it
should at least have a large enough ventilation grille to allow air
into the rack.
Input cable connections
The Input Cabling Appendix B shows balanced and unbalanced
connection from different types of connector to the amplifiers.
Speaker cable connections
Several output connection modes are available. See Appendix
D for more details.
Ensure that you remove only the required length of cable sleeve
that allows for the conductor itself to be hidden. Always note
polarity shown on the back panel.
The cables must be Class II.
Connection to mains
Nominal AC voltage is 230 V. Export versions may operate at
115 V AC. Nominal AC voltage will always be indicated on the
back panel.
Current draw
Consumption can be consulted, for 230 Vac, at the table in
Appendix C. Multiply by two times for 115 Vac.
International safety agencies specify AC consumption using
pink noise at 1/8 th of maximum power. This is done to
represent the current requirements to reproduce a typical
musical programme. The 1/3
case scenario, while the maximum draw represents
consumption with sine wave signal, which will never occur in
practice.
(Current Draw and Heat Emission tables, Appendix C)
Heat emission
Use the table on Appendix C to predict the heat emission from
your amplifier. They are given in both BTU (British Thermal
Unit) and calories.
Serie CSA / CSA series
rd
power rating represents a worst-
Manual del usuario / User's manual
USE

SWITCH ON/OFF

Switch your sound system on from back to front. Thus, switch
on the amplifiers last on your sound system. Switch sound
sources (CDs, turntables) first, then your mixer, then your
processors and crossovers and finally the amplifiers. If you
have more than one amplifier, switch them on sequentially, one
at a time or use a sequencer.
Follow the reverse order when switching off, and switch off the
amplifiers before any other element on your sound system.
CLIP LED
The clip LED should never be on continuously. This will distort
the signal and may damage the speakers. In fact, severe
clipping is an easy way of burning a speaker's voice coil.
The amplifiers feature an automatic limiting system that
impedes prolonged saturation, but the dynamic nature of music
signals stops it from being a brick wall protection. Thus at
most, the clip light could be lit occasionally. Also distorted
music produces listening fatigue.

LEVEL CONTROLS

The LEVEL rotary potentiometer is used for changing the input
gain. Although related to output power, it is not a direct
representation of it. Thus, we can have maximum output
power with the gain at mid position. Similarly, we may have
the gain controls at maximum and not have maximum output
if our source signal is not hot enough.
One way to use the volume controls is to set them such that
when the mixer's faders are at their maximum level, we are
just below clipping level on the amplifier or clipping very
occasionally.
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