Aurora One Rev 1.0
4
1.0
Aurora One Connections and Setup
From the factory, the Aurora One is configured in High Gain Mode for all inputs, unless the
front gain and bypass toggle switches are used.
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To learn about selecting and programming the gain modes, see section 2.0
1.1
Preamplifier Placement
For best operation and longest life of components, the preamplifier should be set up and used in a
well-ventilated area with good air circulation. Do not use the amplifier in enclosed furniture as
overheating can damage the amplifier, diminish tube life, and cause risk of fire.
It is always recommended to place the preamplifier on a sturdy substantial shelf to help minimize
vibrations coupled in from the floor.
Radiating electromagnetic noise (EMI) from sources such as large transformers, cellphones and Wi-
Fi routers can also cause audible noise from the speakers if this equipment if placed too close to
the preamp. It is best to have this equipment located far away.
1.2
Mains AC Grounding
Always share the same AC mains ground circuit with all other audio equipment.
For lowest noise, it is always recommended to share the same AC mains ground circuit between all
audio equipment in a system. The easiest and best way to achieve this is to share a common outlet
or known common circuit and use a high-quality power strip to power all pieces of equipment. This
is most desirable to ensure the ground reference of all audio equipment is at the same potential.
Ground is used as a safety voltage reference and should not have any current flowing. However, it
is likely that any 2 ground circuits in a building
’
s wiring will have a small voltage differential
between them. If these grounds are shared by audio equipment, a ground loop is formed, and the
small voltage differential can now drive a current through the audio ground, causing noise.
Faulty equipment on the AC line can also be a source of ground noise.