User manual
6
ENGLISH
7
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: ovs@
quadral.com
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 some
quadral 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.
HI
LO
+
+
-
-
HI
LO
+
+
-
-
HI
LO
+
+
-
-
HI
LO
+
+
-
-
HI
LO
+
+
-
-
HI
LO
+
+
-
-
HI
LO
+
+
-
-
HI
LO
+
+
-
-
HI
LO
+
+
-
-
Amplifier/
output
stage
Tweeter/midrange
Woofer
Jumper
Amplifier/
output
stage
Amplifier/
output
stage
Amplifier/
output
stage
BDA allgemein 17.10.indd 6-7 01.11.2005 10:11:34 Uhr