Positioning 0; Installation 0; Cable Connection - Bowers & Wilkins Nautilus User Manual

Positioning Installation
Placement of any loudspeaker can significantly All connections should be made with the
influence the relative balance of sound in the equipment turned off. Each Nautilus comes
listening seat and we recommend a degree of with its own dedicated active crossover network.
experimentation. In general it will be found that The serial number on the amplifier end of the
Nautilus gives optimum results when "toed-in" harness should match the serial number on
to a greater extent than in previous systems, the rear of the crossover network.
set typically at an angle of between 60° and The crossover can be connected to the
90°. This is due to the smooth, wide dispersion amplifiers with Phono leads for unbalanced
of Nautilus which is capable of increasing the operation or XLR types for balanced operation.
relative significance of the side-wall reflection. Each Nautilus will require  separate amplifier
Another benefit of the dispersion characteristic channel for each drive unit. The gain and phase
is the substantially increased listening area in of each must be identical.
which a pleasant and realistic stereo image may Each amplifier (channel) should be capable
be enjoyed. of delivering at least 0V RMS into 6 ohms for
60º 90º
 Meter
Listening area
0
realistic levels of reproduction. Most amplifiers
capable of delivering 00 watts into 6 ohms
should be suitable. Connect each of the 
crossover outputs (LF, LMF, UMF, HF) in turn
to each amplifier or amplifier channel.
The loudspeaker harness should then be
connected to the appropriate terminals on
the corresponding amplifier. The input to the
crossover should then be connected to the
output of the preamplifier. Connect the power
and turn on the crossover, followed by
the amplifiers.
To Power Amp
XLR & Phono Outputs
(XLR to be used for
balanced inputs &
Phono for standard
single ended inputs)
USE ONE TYPE ONLY
FOR EACH OUTPUT
From Pre-Amp
XLR & Phono inputs
(XLR to be used for
balanced inputs &
Phono for standard
single ended inputs)
USE ONE TYPE ONLY
Mains A/C in

Cable connection

High Frequency Unit Connection to Nautilus is via an 8-core cable of
high purity silver on copper, terminated in bare
+ RED + ROT + ROUGE + ROJO + ROSSO
– BLACK – SCHWARZ – NOIR – NEGRO – NERO
ends to allow the most direct connection to the
+ VERMELHO + ROOD
amplifier terminals.
– PRETO – ZWART
It is generally accepted that the wires between
power amp and driver should be as short as
possible, so we do not recommend that the
Upper Mid Range Unit captive cable be lengthened in any way.
In the majority of cases it will be most
+ BROWN + BRAUN + MARRON + MARRON + MARRONE
– BLUE – BLAU – BLEU – AZUL – AZZURRO
convenient to locate the crossover units in
+ CASTANHO + BRUIN
close proximity to the power amplifiers, with
– AZUL – BLAUW
correspondingly short line interconnects. Each
cable should be connected directly to the
respective outputs of each amplifier.
The line from pre-amplifier and crossover
is likely to be comparatively long and
Lower Mid Range Unit
should, therefore, be of high quality and low
+ YELLOW + GELB + JAUNE + AMARILLO + GIALLO
capacitance. It is further recommended that the
– GREEN – GRÜN – VERT – VERDE – VERDE
balanced input of the crossover be used with
+ AMARELO + GEEL
– VERDE – GROEN
two-core screened cable – even if the pre-amp
is single ended.
In the latter case, the screen and one core
should be joined at the source end.
Detail of twin cored screened lead connecting
phono to XLR plugs (pre-amp to x-over)
Low Frequency Unit
+ ORANGE + ORANGE + ORANGE + NARANJA + ARENCIO
– VIOLET – VIOLETT – VIOLET – VIOLETA – VIOLETTO
+ LARANJA + ORANJE
– VIOLETA – PAARS