Safety Instructions; Connection To The Preamplifier; Mains Power Connection - Pro-Ject Audio Systems Amp Box S3 CI Instructions For Use

Dear music lover,
thank you for purchasing a Pro-Ject Audio Systems custom integration amplifier.
In order to achieve maximum performance and reliability you should study these instructions for use carefully.
Warning of a hazard for the user, the unit or possible misuse.
Important notice.

Safety instructions

AC outlet voltages vary from country to country. Before connecting to the mains, make sure that the
voltage in your area meets the voltage requirements printed on the power supply. The power cord is
used to disconnect the unit from the mains. Make sure that the power cord is easily accessible at all times.
Never handle the device, the power cord/power supply while your hands are wet or damp.
Avoid letting liquids enter the device or the power supply. Never place any item containing liquid, such
as a flower vase on or near the device. Never spill any liquid on the device or the power supply. Never
place any naked flame sources, such as lighted candles on or near the device. The product shall not be used
in damp or wet locations, next to a bathtub, sink, swimming pool or any other similar conditions.
Connectors
Make all connections whilst the amplifier is disconnected from the mains. Take care to connect the left
and right channels correctly. The right channel is usually marked red, the left channel black or white.
Make sure the polarity of the connection is correct at each end of the cables.
Only connect one loudspeaker with an impedance not less than 4 ohms per channel.
Never use any other power supply than the one supplied with the unit.

Connection to the preamplifier

The Input sockets marked Left / Right are for connecting the cables from your pre-amp or AV processor. Signal
can be relayed further via RCA output marked Loop.
Connection to the speakers
The output terminals accept phoenix connectors. A 4-pin phoenix connector for the speaker outputs is included
in the packaging.
Take care to mount L+/- and R+/- speaker cables wires correctly. + and – is usually clearly marked
on speaker cables.

Mains power connection

Connect the low voltage plug from the power supply to the Power DC 20-24V phoenix connectors of the
amplifier before connecting the power supply to the mains. A 2-pin phoenix connector for the power supply is
included in the packaging. Mount the
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© Pro-Ject Audio Systems · Amp Box S3 CI · Revision 2024.05.27
red PSU cable in the "+" and the black in the "-" connectors.