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Subwoofer and centre
speaker
You can connect a subwoofer and a
centre speaker to this device.
In order to optimise the sound still fur-
ther when using a subwoofer and cen-
tre speaker, you can set a low-pass fil-
ter for the subwoofer and a high-pass
filter for the front and rear channels sep-
arately.
Adjusting the subwoofer boost
level (gain)
You can set a permanent volume boost/
reduction level between -6 and +6 for
the connected subwoofer and therefore
emphasise or tone down the subwoof-
er’s bass reproduction. The setting that
you should select depends on the in-
stallation position and location of the
subwoofer in your vehicle. If necessary,
find out which setting you prefer by try-
ing out the various settings.
➮ Press the AUDIO button :.
“AUDIO MENU” appears in the display.
➮ Press the softkey 5 assigned to
the “SUBOUT” display item.
➮ Press the softkey 5 assigned to
the “GAIN” display item.
➮ Move the joystick 8 up/right to
boost the gain or move it down/left
to reduce the gain.
When you have finished making your
changes,
➮ press the joystick OK 8 or the
AUDIO button :.
Adjusting the subwoofer phase
You can adjust the phase of the sub-
woofer output to suit your subwoofer.
The phase setting can be adjusted in
steps of “45°” to between “-135°” and
“180°”.
➮ Press the AUDIO button :.
“AUDIO MENU” appears in the display.
➮ Press the softkey 5 assigned to
the “SUBOUT” display item.
➮ Press the softkey 5 assigned to
the “PHASE” display item.
➮ Move the joystick 8 to switch be-
tween the available settings.
When you have finished making your
changes,
➮ press the joystick OK 8 or the
AUDIO button :.
Setting up the low-pass filter
You can use the low-pass filter to set a
frequency up to which the subwoofer
will work. All the signals above the set
frequency will be “cut off” and not sent
to the subwoofer.
You can choose between the following
frequencies: “40 Hz”, “50 Hz”, “63 Hz”
and “100 Hz”. If your subwoofer is fitted
with a built-in low-pass filter, you can
also select the “FLAT” setting and thus
allow all the frequencies to be sent to
the subwoofer.
You should adjust this setting to suit the
frequency range and capabilities of your
subwoofer. For further information,
please read the subwoofer’s documen-
tation.
SUBWOOFER AND CENTRE SPEAKER