Audio Research Definition DSi200, Owner'S Manual, Page: 6 / 14

14-gauge and have a standard grounding plug properly
installed. These power cords are to be used with caution,
at the sole risk of the owner.
Installation
The amplifier may be installed in a ventilated cabinet;
observe the following guidelines to maximize the perfor-
mance and service of your amplifier.
With proper installation, the DSi200 may be left on contin-
uously for maximum performance on demand; it will draw
38 watts of AC power at idle. However, the DSi200 has
been designed and engineered to minimize any “warm up”
necessary for best sonics; generally, a half-hour to 45 min-
utes 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 DSi200 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, irregu -
lar 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 air flow above
and below the unit is provided. The “ambient” operating
temperature should never exceed 120º F or 49º 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 DSi200 power amplifier to run slightly
warm to the touch. All components within are operated at
safe, conservative levels and will not be improperly affect-
ed, providing the requirements outlined above are adhered
to.
Do not operate your DSi200 without the top and bottom
covers installed. These are required both for safety as well
as shielding from interference (except in service operations
by qualified personnel).
Operating Procedure
Start-up:
1 . Make sure you have read and complied with the
INSTALLATION AND CONNECTION instructions prior
to attempting operation.
2. Secure all rear-panel connections between DSi200, and
input sources,
and loudspeakers.
3 . Make sure the DSi200 is properly connected to a ground-
ed high-current power receptacle via the supplied
14-gauge, 3-prong grounded power cord (see AC POWER
CONNECTIONS).
4. Turn on source component(s) to be used.
5. Press Power switch (either on remote or front panel).
The display will illuminate and the Mute LED will flash
for approximately 5 seconds while power supply stabi-
lizes, indicating operation of automatic muting circuit.
After this automatic muting period the word “MUTE”
will stay on, indicating that your DSi200 is in the “mute”
position. Adjust the Volume control to the minimum
level. Press “Mute” button to initiate operation. When
the “o p e r a te” position is manually selected the word
“MUTE” will turn off, indicating the DSi200 is ready for
operation.
Note: If the display does not come on, check the line fuse
for possible failure. An extra fuse for A. C. power is
included with your DSi200.
6. Press Input selector for desired source; set remaining
switch options to desired positions.
7. Activate selected input source, then deactivate Mute
switch and adjust Volume control as necessary.
8 . Your DSi200 should now operate satisfactorily. However,
a full stabilization or warm-up time of approximately one
half hour is recommended for best sonic performance.
Shut-Down:
1. Activate “Mute” function.
2. Set Volume level to “0”.
3. Press Power switch to “off ”.
4. Turn off input sources.
Troubleshooting:
It is possible for a static discharge to temporarily disable
the microprocessor that allows the controls to function. If
this should occur, depress the “Mute” button, then turn off
the DSi200 and
unplug from the A.C. receptacle for 60
s e c o n d s .
Reconnect the A.C. plug and turn the unit back
on. The controls should resume normal operation. If the
problem persists, contact your dealer or Audio Research
Customer Service at 763-577-9700.
Model DSi200
3