VAC Phi 300 - Manual (Page 9)

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10) Do not place in a completely enclosed cabinet. Do not stack other equipment on top of
the VAC unit.
11) Do not operate on carpet or any other surface that might block air flow.
12) The chassis and glass will become hot in normal use.
13) Do not allow the chassis to touch any metal parts, such as the frame of an equipment rack.
This might create a parallel ground path that could degrade the sound of your system.
14) Connect the power cord to the power source indicated on the rear panel (will be either
100, 120, 220, or 240 volts AC). Voltage conversions must be done at the factory of by
an authorized VAC importer.
15) Avoid power conditioners that float the ground pin.
16) Power requirements are approximately 1000 watts. Pay close attention to power quality,
and be aware that different power cords can alter the sound.
17) Check the bias settings of the output tubes when the unit is first installed and whenever
a tube is changed. It is also a good idea to verify the settings periodically, such as once a
week. Follow the bias procedure outlined later in this manual.
18) Note that there is a front panel MUTE switch; this function causes the input signal(s) to be
muted. The Phi 300 will only be muted if you select it. This may be useful if you are changing
cables or source equipment.
NOTE: Do not remove and connect input cables or speaker cables while is amplifier is running.
Doing so risks damage to your loudspeakers or the amplifier.
Do not operate the amplifier without a loudspeaker or load resistor attached.