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10
User's Manual
Observe the following precautions when
choosing a location for your Classic vacuum
tube preamplifier:
• The Classic is an all-vacuum tube
design. It may be operated at any
angle, and has modest ventilation
requirements. Do not cover the side
ventilation slots.
• It’s location relative to other stereo
components is not critical, except that
it should not be stacked with, or placed
adjacent to, powerful amplifiers which
may generate external hum fields.
• Typically it is best to locate the Classic
close to the turntable or CD player so
that connection cables may be kept
short. The turntable should be on a
solid, vibration-free surface to avoid
problems of acoustic feedback and
instability. In many systems it may be
convenient to locate the preamp within
arm’s length of the prime listening
position, for which long cables to the
amplifier will be necessary; normally,
cable runs of up to 30 feet are OK.
• Protect it from prolonged exposure to
direct sunlight and other direct
sources of heat, such as heating
vents and radiators.
• Do not expose the unit to rain or
moisture. If fluid or a foreign object
should enter the unit, immediately turn
off the power and contact your Sunfire
Dealer.
• Avoid excessive exposure to
extreme cold or dust.
• Do not place heavy objects on top of
the unit.
AC Power Considerations
Ensure that the unit is plugged into an outlet
capable of supplying the correct voltage
specified for your model.
Care
If you need to clean the front surface, first turn
off the power and then use a slightly damp-
ened cloth, rubbing with the grain. Be careful
not to scratch the front window.
Connection Tips
Before setting up your new system, please
consider the following :
• Before making or changing any
connections, check the front panel to
make sure the Power switch is DOWN
(off), and that the Volume Control is
set for no output (full counterclock-
wise). The amplifier and all other
equipment should be turned off and
the preamplifier line cord unplugged
before making any connections.
• Whenever possible, keep the power
cords away from the signal cables
or speaker wires to prevent any hum
or interference being heard in the
speakers.
• Choose reliable interconnect cables,
also called patch cords or RCA cables.
They should be fully shielded and as
short as possible for the job.
• If your amplifier has balanced inputs,
then we recommend using the bal-
anced outputs of the preamplifier as
this will provide superior noise rejec-
tion.
• Some patch cords can be a very tight
fit and there is usually a preferred
method of getting them off, some have
to be removed with a twisting action.
Be gentle or you may damage the
jacks of the amplifier or your other
components.
Installation
Installation