Audio Research Definition DS450M, Руководство пользователя

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6
Installation
The amplifier may be installed in a
ventilated
cabinet; observe the
following guidelines to maximize the
performance and service of your
amplifier.
With proper installation, the DS450M may
be left on continuously for maximum
performance on demand; it will draw
approximately 55 watts of AC power at
idle. However, the DS450M has been
designed and engineered to minimize
any ‘warm up’ necessary for best sonics;
generally, a half-hour or 45 minutes of
actual playing time will bring the
amplifier
around to more than
acceptable performance levels, with
some
additional improvement
noticeable over the next hour or two.
Warm-up characteristics will depend
upon ambient room temperature at
start-up, the nature of the installation
and the resolving power of the
associated equipment.
Operate the DS450M only in a horizontal
(upright) position. Adequate airflow and
proper cooling can be maintained only
if there is no restriction around the unit.
The five (5) non-marring feet provide
adequate spacing and mechanical
damping only from a smooth, hard
surface.
Never operate the unit while it is
sitting on a soft, irregular surface such as
a rug
or carpet.
If the unit is to be operated in an
enclosure such as an equipment rack,
make certain that adequate ai flow
above and below the unit is provided.
The ‘ambient’ operating temperature
should never exceed 120 degrees F or
49 degrees C. Improper installation will
cause premature component failure
and will affect your warranty, as well as
the service life of the unit.
It is normal for the DS450M power
amplifier to run lightly to moderately
warm to the touch. All components
within
are operated at safe,
conservative levels and will not be
improperly affected, providing the
requirements
outlined above are
adhered to.
Remote Turn-on Connections
The DS450M has a built-in 12VDC remote
turn-on/off circuit for operation by a
master control system in a home theater
or large audio system. Use a 3.5mm
(140") diameter mini plug to connect to
the +12V IN jack on the rear of the
DS450M. Two identical paralleled jacks
are
provided to allow chaining
connections to control two or more
DS450Ms or other equipment.
The +12V IN jack should be connected
to the +12VDC output of the master
control system, using a continuous
+12VDC signal at 20mA per DS450M for
the duration of amplifier on time. Do not
use a momentary or data pulse control
signal.
The front power switch on the DS450M
must be off to use the remote turn-on.
Front power switch is disabled when 12
volt trigger is energized. The front power
switch will not turn the DS450M off if the
12 volt trigger is energized.
The +12VDC remote jacks have polarity
protection, so they will not operate if a -
12VDC signal is accidentally connected,
or if the control wires are reversed.
Operating Procedure
1. Make sure you have read and
followed the INSTALLATION and
CONNECTION instructions prior to
attempting operation.
2 .Secure all rear panel connections
between DS450M, and input source,
and loudspeakers.
3. Make sure the amplifier is properly
connected to a high-current AC
power receptacle via the supplied
power cord (see CONNECTIONS).
4. Your preamplifier should be ‘On’ and
muted and/or set at minimum gain.
5. Turn Power switch from ‘Off’ to ‘On’.
Unit is ready to play when LED is on.
Note: if the power indicator LED fails to
light, turn the Power switch to ‘Off‘
and check the appropriate fuse for
possible failure. Extra fuses for AC
power are included with the unit. If
green light is blinking after turn on, a
low line voltage condition exists–turn