Quadral AURUM 170 - Manual (Page 4)

Rear centre speaker
In contrast to 5.1 surround sets, 6.1 systems have an additional rear centre speaker
that should be placed behind and slightly above the typical listening position.
Rear speakers
Whether you direct the rear speakers toward the listening position is a matter of taste.
Also, many listeners prefer the rear speakers to be positioned above ear height. This
can be achieved by mounting the units on a sturdy wall bracket, a high speaker
stand, a sideboard or shelf.
Stands and wall brackets
To obtain optimal positioning of the front and rear speakers, quadral offers suitable
stands and wall brackets. Some speaker models also have a keyhole-shaped cut-out
in the back of the speaker for wall mounting.
Should you have any questions, please contact us on tel.: +49 (0) 511 7904-0,
e-mail: [email protected]
Connecting to the amplifier
Before connecting the speakers to your hi-fi or surround system, make sure the
amplifier/receiver is switched off and its status LED is not lit. To connect the speakers,
you will need a two-core speaker cable for each speaker. Make sure these are of
sufficient length and don’t shorten the cables before checking they are long enough
to hide behind furniture or under the carpet. For cables longer than 5 metres, we
recommend a cross-sectional area of at least 2.5 sq mm per core in order to avoid
unnecessary power loss. Strip the insulation of the cores to a length of around 10 mm
at both ends of the cable so that they are bared for good contact.
Screw terminals
For connection, the speakers are provided with colour-coded screw terminals on the
back of the cabinet. Loosen the screw terminals and feed the stripped end of the
core into the hole that is now free. The two cores of speaker cables have different
colouring or shape for recognition. Connect one core to the red, positive terminal
– the remaining core to the black terminal. Tighten the screws hand-tight. To ensure
correct polarity, check that the core connected to the red, positive terminal of
the speaker is also the core that is connected to the red, positive terminal of the
amplifier and that the other core is connected to the black, negative terminals of
both the speaker and amplifier.
With the AURUM loudspeakers, you can choose between three modes of
operation.
a) Conventional mode
Do not remove the jumpers,
connect the speaker cable
as shown in the illustration.
b) Biwiring mode
Open the jumpers after loosening the four
screw terminals on the back of the speaker
and connect the cable as shown in the
illustration.
c) Biamping mode
Open the jumpers and connect
the cables as shown in the illustration.
In the biwiring/biamping mode, the bass frequencies are controlled via the two
lower terminals – and the midrange/treble frequencies via the two upper terminals.
Make sure you use the correct polarities in these modes and that you remove the
jumpers on the speaker terminal to avoid damaging your amplifier.
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Amplifier/
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BDA AURUM 22.1005.indd 6-7 30.10.2005 15:39:07 Uhr