7
In your system
To ensure normal component life and safe
operation this unit must be operated only
in an upright position. Adequate airflow
and proper cooling can occur only if there
is no restriction above and behind the unit
and on either side.
The special non-marring elastomer feet
provide adequate spacing and stability
only on a smooth, hard surface, and also
assist to isolate the preamplifier from
spurious vibrations. For upright stability
and best performance, never operate
the unit while it is sitting on a soft surface
such as a thick rug or carpet.
Due to its weight, this preamplifier must
be supported on a surface specifically
rated for such a load. Check with the
manufacturer of your support system to
be sure it is rated to handle this weight.
If the unit is to be operated in an
enclosure such as an equipment rack,
make certain that adequate airflow above
and to each side of the unit is provided.
Audio Research recommends a minimum
of 6-8 inches (15-20 cm) of clearance
above the LS28SE to maintain proper
ambient operating temperature.
The ‘ambient’ operating temperature
should never exceed 120° F or 49° C.
Improper installation will cause premature
tube failure and will affect your warranty,
as well as the service life of the unit.
It is normal for a vacuum tube preamplifier
to run quite warm, and if used for
prolonged periods, hot to the touch.
All components within are, however,
operated at safe, conservative levels and
will not be improperly affected thereby,
providing the requirements outlined
above are adhered to.
A Note about Vacuum Tubes
The vacuum tubes in your LS28SE have
been burned in, tested and electrically
matched to provide the best performance
and reliability of your preamplifier. That
said, vacuum tubes must be replaced
from time to time. The 6H30 tubes in the
LS28SE should have an expected life
of approximately 4,000 hours, while the
6550WE tube in the power supply should
have a life expectancy of approximately
2,000 hours. These life expectancies are
only approximate.
Summary of Contents for ARCLS28SE
Page 1: ...H I G H D E F I N I T I O N LS28SE...
Page 2: ...There is only One Reference...
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