Dynacord Professional Power Amplifiers - Manual (Page 45)

dsa s
eries
- d
ual
-C
Hannel
45
DSA Series - Dual-Channel
amplifiers that proviDe a multituDe of highly economic
solutions to the proBlems poseD By fixeD installations.
solid dYnacord technology
for fixed installations at very
competitive prices was the
maxims for the development of
the dsa power amplifier series.
They offer a very high, stable out-
put with high efficiency at a high
performance level. DSA power
amplifiers are therefore the ideal
choice for typical fixed installation
applications.
They are protected against over-
heating, short circuit and both
high frequencies and DC at the
output. Damage to the end transistors
through the feedback of electrical
energy is prevented by the back
EMF protective circuitry. During
a soft start, a relay delays the
switching on of the power outputs.
In addition, a power-up current
limiter prevents the blowing of the
mains fuses. Fast audio processors
continuously compare the input
and output signals. In the event of
any non-linearity, the processors
send control signals to the limiters,
which dynamically reduce the in-
put gain of the power amplifier.
Input level controls on the rear panel
and level and control displays on
the front panel offer a high degree
of user comfort, and a quick over-
view of the operating state of the
power amplifiers is provided by
the easily read LED display with its
Power, Protect, Signal Display and
Limit indicators.
A switchable high-pass filter (HPF)
(50 Hz, 18 dB/oct) can be used
to suppress low frequency signals,
which otherwise could lead to satura-
tion of the transformers when out-
put transformers are connected. A
Ground Lift switch is also provided
to separate the chassis ground
from the signal ground in order to
eliminate ground loop hum.
The POWER REMOTE connector
makes the task of remote controlling
the power amplifier as well as
switching it on and off simple.
For further remote-supervision and
–control possibilities and integration
into IRIS-Net networks, an optional
remote control module (RCM-810)
is available. (see pages 42-43)
German engineering. Manufactured
in accordance with the Bosch
Production System (BPS) in Zhuhai,
China.