31
5Press M or m to adjust the volume
level.
The volume level is adjustable by 1 dB steps
from –12 dB to +12 dB.
Tip
When you lower the volume all the way down,
“–∞dB” appears and the cut-off frequency is
disabled.
6Press (ENTER).
After the effect setting is complete, the
display returns to the normal playback mode.

Adjusting the volume of the

subwoofer(s)

1Press (SOURCE) to select a source
(tuner, CD, or MD).
2Press (SOUND) repeatedly until “SUB”
appears.
3Press < or , to adjust the volume.
After 3 seconds, the display returns to the
normal playback mode.
Tip
When you press < repeatedly to adjust the volume
all the way down, “–∞dB” appears and the cutout
frequency of the subwoofer is disabled.

Adjusting the frequency of the

subwoofer(s) (CDX-M770 only)

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 so you can get
a clearer sound image.
1Press (MENU).
2Press M or m repeatedly until “Sub
LPF” appears.
3Press (ENTER).
4Press < or , to select the desired
cut-off frequency.
Each time you press < or ,, the frequency
changes as follows:
62 Hz y 78 Hz y 99 Hz y 125 Hz
y 157 Hz y off
5Press M or m to adjust the volume.
The volume level is adjustable by 1 dB steps
from –12 dB to +12 dB.
Tip
When you lower the volume all the way down,
“–∞dB” appears and the cut-off frequency is
disabled.
6Press (ENTER).
After the frequency setting is complete, the
display returns to the normal playback mode.

Other adjustable items (CDX-

M670, MDX-M690 only)
The following items can be adjusted:
•HPF (High pass filter) — to select the cut-off
frequency to “off,” “78 Hz,” or “125 Hz.”
•LPF (Low pass filter) — to select the cut-off
frequency to “78 Hz,” “125 Hz,” or “off.”
•Loud (Loudness) — to enjoy bass and treble
even at low volumes. The bass and treble will
be reinforced.
1Press (MENU).
To set A.Scrl, press (MENU) during CD/MD
playback.
2Press M or m repeatedly until the
desired item appears.
3Press , to select the desired setting
(Example: “on” or “off”).
4Press (ENTER).
After the mode setting is completed, the
display returns to normal play mode.
Note
The displayed item will differ depending on the source.
Tip
You can easily switch among categories by pressing M
or m for 2 seconds.
Cut-off frequency
Frequency (Hz)
Level