7
Installation
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 phono 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
Reference Phono 3 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 Reference Phono 3
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 Reference Phono 3 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 Reference Phono 3
Page 1: ...Reference Phono 3 H I G H D E F I N I T I O N...
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