10
11
Connection variant no. 4b
(Differences of models cause a different position of the operating elements.)
Starting up
Having correctly connected up your subwoofer as described in the above, first switch on your
amplifier. Now switch on your subwoofer by means of the mains switch on the rear panel.
The indicator must then light up. When it does so, this means that your subwoofer is now
ready for operation.
When the unit has been switched on you can now adjust the subwoofer to achieve the ideal
balance. This will only be necessary once unless you purchase new speakers. In this case you
will have to balance the subwoofer again with the new speakers.
Now put your system into operation with a music signal. First set the Frequency control to
centre (neutral) position. Now slowly turn the Volume control clockwise until a tonal balance
is established in the bass range between the subwoofer and your satellites. You can use the
Frequency control to adjust the crossover range.
The general rules here are:
large satellites (boxes), turn the control further anticlockwise
and
small satellites (boxes), turn the control further clockwise.
Having adjusted the Frequency control it might be necessary to readjust the Volume control
to achieve an ideal tonal balance again. The superimposition of your satellites’ sound waves
and those of the subwoofer can lead to interference at your listening position. At worst, this
means that the bass sound you hear there will be no more than “subdued“ despite correct
setting of Frequency and Volume controls. If this is the case, please turn the Phase control on
the rear panel to the 0° or 10° position (not possible with the SUB 45).
At a point of the Phase control you will notice the bass sound becoming more powerful
and punchy. By experimenting and listening you will thus find the ideal setting to suit your
requirements.
Please note: Always bear in mind that the setting of the subwoofer should be carried out to
suit your listening position. That means that when adjusting a control you should always return
to your listening position to hear whether your adjustment has a positive effect there.
5. Subwoofer electronic
(Differences of models cause a different position of the operating elements.)
Switch for upper transition frequency:
When the selector switch is set at VAR, the FREQUENCY con-
troller regulates the upper crossover frequency.
When the selector is set at FLAT, the subwoofer will operate up
into the lower midranges and requires the active filtering of an
AV receiver or AV amplifier.
Operating the subwoofer using the Sub Out
terminal of a surround amplifier
If your surround amplifier offers you the option of adjusting the volume of the subwoofer via
the bass management facility we recommend that you proceed as follows:
Adjust the subwoofer's volume control switch to the "neutral" position, and the Frequency con-
trol switch to the "maximum" position. Now carry out a volume test on the surround amplifier,
setting the satellites and the subwoofer to identical volume levels.
Please refer to the operating instructions supplied with your surround amplifier for details on
volume adjustment.
Sub Pre-Out
POWER
PHASE
LOW LEVEL
INPUT
L
R
STANDBY
OFF
ON
0∞
180∞
R
L
R
L
-
+
+
-
HIGH LEVEL
OUTPUT
HIGH LEVEL
INPUT
-3
3
d
2
-14
FREQUENCY
VOLUME
150
0 dB
-7
50
100 Hz
65
80
120
135
SURROUND AMPLIFIER
SUBWOOFER
ENGLISH
POWER
PHASE
STANDBY
OFF
ON
0∞
180∞
-3
3
d
2
-14
FREQUENCY
VOLUME
150
0 dB
-7
50
100 Hz
65
80
120
135
FREQUENCY
FLAT
VAR.
150
50
100 Hz
70
85
120
135
BDA Subwoofer 11.2006.indd 10-11
16.11.2006 13:28:02 Uhr
