Sony CDX-M9900 Mode D'emploi page 33

Adjusting the subwoofer
volume
— Sub Woofer
1
Press (SOURCE) to select a source
(radio, CD, MD or AUX).
2
Press (MENU).
3
Press < or , repeatedly to select
"Sound," then press (ENTER).
4
Press < or , repeatedly to select
"Sub Woofer," then press (ENTER).
5
Press < or , repeatedly to adjust
the volume level, then press (ENTER).
The volume level is adjustable in 1 dB steps
from –∞, –10 dB to +10 dB.
6
Press (MENU).
The display returns to the normal display.
Tip
"–∞" appears when the volume level is below –10 dB.
Adjusting the cut-off frequency for the
subwoofer(s)
— LPF (Low pass filter)
To match the characteristics of the connected
subwoofer(s), you can cut out the unwanted high
and middle frequency signals entering the
subwoofer(s). By setting the cut-off frequency
(see the diagram below), the subwoofer(s) will
output only low frequency signals for a clearer
sound.
Cut-off frequency
Frequency (Hz)
1
Press (SOURCE) to select a source
(radio, CD, MD or AUX).
2
Press (MENU).
3
Press < or , repeatedly to select
"Sound," then press (ENTER).
4
Press < or , repeatedly to select
"LPF," then press (ENTER).
5
Press < or , repeatedly to select the
desired cut-off frequency, then press
(ENTER).
Each time you press < or ,, the frequency
changes as follows:
OFF y 125Hz y 78Hz
6
Press (MENU).
The display returns to the normal display.
To cancel the cut-off frequency, select "OFF" in
Step 5.
off
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