Heat Emission; Operation; Switch On/Off - D.A.S. Energy Serie Manual Del Usuario

3.6.- HEAT EMISSION

Use the table below to predict the heat emission from your ampli-
fier, which can be useful to evaluate air conditioning requirements.
They are given in BTU (British Thermal Unit) and calories.
MODEL
CARGA Max. POWER
LOAD
BTU/h
8 + 8 ohms 485
E - 2
4 + 4 ohms 790
8 + 8 ohms 865
E - 4
4 + 4 ohms 1440
8 + 8 ohms 810
E - 8
4 + 4 ohms 1320
Bridge 8 ohms 1380
8 + 8 ohms 1280
E - 12
4 + 4 ohms 1600
Bridge 8 ohms 1795
8 + 8 ohms 3740
E - 20
4 + 4 ohms 5815
Bridge 8 ohms 5710

4. OPERATION

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.
Follow the reverse order when switching off, and switch off the
amplifiers before any other element on your sound system.
CLIP LED
The red LED light 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. At most, the clip light
could be lit occasionally.
Additionally, models E-2 and E-4 feature an automatic limiting
system that impedes prolonged saturation (clip), therefore
protecting the speakers from one of the most common failure types.
23 HIGH PERFORMANCE POWER AMPLIFIERS
1/3 POWER 1/8 POWERA
Kcal/h BTU/h Kcal/h BTU/h
120 500 125 395
200 735 185 600
220 815 205 645
365 1370 345 1060
205 355 90 140
330 320 80 165
350 445 110 210
325 565 145 230
405 420 105 150
450 510 130 185
940 1995 505 1130
1465 2325 585 1305
1440 2215 560 1260
Fig.3.7
LEVEL CONTROLS
The INPUT 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
IDLE
have the gain controls at maximum and not
Kcal/h BTU/h Kcal/h
100 155 40
have maximum output if our source signal is not
150 155 40
165 315 80
hot enough.
265 315 80
35 235 60
One way to use the volume controls is to set
40 235 60
them such that when the mixer's faders are at
55 235 60
60 315 80
their maximum level, we are just below clipping
40 315 80
45 315 80
level on the amplifier or clipping very
285 315 80
330 315 80
occasionally.
320 315 80
INPUTS - XLR and 1/4" PHONE (commonly referred to as "jack")
Both connectors are in parallel so any of them can be used to feed
signal to an amplifier channel. Although unbalanced signals can be
used, we recommend the use of balanced connections for the
greater immunity to interfering noise. XLR is normally preferred to
1/4" phone since it has a locking mechanism that avoids accidental
disconnection.
Since they are in parallel, they can be used to feed the signal to
another amplifier. For example, one could plug into channel A's XLR
connector, and use the 1/4" ("jack") connector of the same channel
to feed another amplifier with the same signal.
The graphs that follow show the recommended connection from
different connector types. The connectors on the left hand side plug
into the sound sources such as mixers, and the connectors on the
right plug into the amplifier's input connectors. Note that
unbalanced to balanced connections have two terminals joined
together (- and ground). When using balanced to balanced
connections, try lifting ground on the input connector if hum is
present in the system.