Installation And Connections; Installation; Connections In General; Connecting Loudspeakers - SPHINX PROJECT EIGHTEEN User Manual

4. INSTALLATION AND CONNECTIONS

Installation

Attention: The power amp weighs more than 24
kg!
So make sure you place the Project Eighteen on a
stable and sturdy support.
Never 'stack' two power amps on top of each other.
The Project Eighteen will become warm so correct
placement is critical. Do not position it on top of or
close to other heat radiating equipment (such as
other power amps) or in direct sunlight.
Please ensure the unrestricted ventilation
around the component.
If you need to use the amp in a closed cabinet or on
a bookshelf you absolutely provide unrestricted
ventilation around the component.
To prevent any possible interference keep power
supply cables away from all audio cables.
If all these conditions will be met the Project
Eighteen shall perform to the extremely high
standards it is designed for.

Connections in general

Before you start connecting equipment it always is
wise to check whether all mains power cables of all
components are disconnected from the mains
outlets!
This will prevent any damage to the loudspeakers
and amplifiers caused by incorrect wiring or
settings.
Always use loudspeaker and audio cables and
connectors of the highest quality.
Siltech cable is used throughout internally so we
recommend using this same cable for all external
connections.
If you have the choice between longer loudspeaker
cables or longer audio cables, choose the latter
(cables between preamp and power amp will cause
the least signal quality loss).
SPHINX

Connecting loudspeakers

We recommend using a double pair of cables if this
is possible with the loudspeakers used (one pair for
the highs and another for the lows).
In most cases you will hear a substantial
improvement in the sound quality (but: be careful to
prevent shorted connections).
Your dealer can recommend the best cables and
connection methods.
Connect the red RIGHT OUTPUT terminal (3.) to
the red or '+' terminal of the right loudspeaker.
Connect the black RIGHT OUTPUT terminal (3.) to
the black or '—' terminal of the right loudspeaker.
Connect the left loudspeaker in the same way to the
LEFT OUTPUT terminals (11.)
When using unterminated cables please check
carefully if there are no 'loose ends' cause a short
between the '+' and the '—' of the terminals on amp
and loudspeakers!

Connecting the inputs

Make sure you connect L and R properly. Most
cinch cables use Red for the Right channel and
White or Black for Left.
All cinch connectors on the Project Eighteen's rear
panel have a red centre for the right channel and a
white one for the left channel.
The XLR connectors are marked BALANCED
RIGHT and LEFT.
When making the connections please refer to the
descriptions for parts 3. up to 13. on page 5.
The Project Eighteen has two input types

Balanced

To the BALANCED LEFT and RIGHT(600 Ω) inputs
you connect the corresponding outputs from the
pre-amp.

Unbalanced

The unbalanced inputs CINCH LEFT and CINCH
RIGHT (20 kΩ) can be used for any unbalanced line
level signal (like from a pre-amp).
Use only one type of input. The switch (7.) on the
rear panel lets you select between the type of
inputs.
Note: Do not place a so-called 'shorting connector'
in the unused input.
Project Eighteen
6