Sony CDX-M9900 - Subwoofer and Loudness Settings

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Adjusting the cut-off frequency for the
front/rear speakers
— HPF (High pass filter)
To match the characteristics of the installed
speaker system, you can select the cut-off
frequency of the speakers.
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
“HPF,” 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 78Hz y 125Hz
6 Press (MENU).
The display returns to the normal display.
To cancel the cut-off frequency, select “OFF” in
Step 5.
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.
Cut-off frequency
Frequency (Hz)
Level
off