Audio Research HIGH DEFINITION PH9, Manual

Page: 5 / 22

5
Warnings
• To prevent fire or shock hazard, do not
expose your PH9 to rain or moisture.
• Do not place objects containing
water on top of this unit.
• This unit contains voltages which can cause
serious injury or death. Do not operate
with covers removed. Refer servicing
to your authorized Audio Research
dealer or other qualified personnel.
• The detachable power cord on your PH9 is
equipped with a heavy gauge, 3-conductor
(where applicable) cable and a standard
three-prong grounding plug. For absolute
protection, do not defeat the ground
power plug. This provides power line
grounding of the PH9 chassis to provide
absolute protection from electrical shock.
• The appliance coupler (a.c. power
connector) at the rear of this unit must be
accessible for emergency power disconnect.
• The power button on the front of this
unit, when off, does not disconnect
all power from this unit. This unit is
in sleep mode when not on. (In sleep
mode, the tubes and audio circuit are
powered off; the microprocessor that
operates the PH9 remains on).
• For continued protection against fire
hazard, replace the fuse only with the same
type and rating as specified at the fuse
holder (see page 19 for fuse information).
• This unit is RoHS compliant.
• The PH9 has automatic muting to help
protect system components in the event
of low line voltage. When sensing low line
voltage, the preamp displays ‘Low Line’
and automatically goes into ‘Mute’. This
condition will persist until the line voltage
returns to a safe operating level; please
note the unit will remain in ‘Mute’ even
after ‘Low Line’ no longer appears.
• Note that automatic muting is only
designed to protect against power line
interruptions or severe voltage drop. It
will not mute in the event of subsonic
transmissions from a faulty input source,
amplifier failure or speaker malfunction.
A note about packaging...
Save all packaging in a dry place away from
fire hazard. Your PH9 preamplifier is a
precision electronic instrument and should
be properly cartoned any time shipment is
made. You may not have occasion to return
your unit to the factory for service, but if
that should prove necessary, or another
occasion requiring shipment occurs, the
original packaging will protect your PH9
from unnecessary damage or delay.