Yamaha AX-490 - Manual (Page 9)

9
Adjusting the BASS and TREBLE
controls
Adjusting the BALANCE control Selecting the SPEAKER system
Adjust the balance of the output volume to the left and right
speakers to compensate for sound imbalance caused from
speaker location or listening room conditions. Because one or two speaker systems can be connected to this
unit, the SPEAKERS switches allow you to select speaker
system A or B, or both at once.
BASS : Turn this clockwise to increase (or counter-
clockwise to decrease) the low frequency
response.
TREBLE : Turn this clockwise to increase (or counter-
clockwise to decrease) the high frequency
response.
Adjusting the continuously variable
LOUDNESS control
This control provides compensation for the human ears’ loss of
sensitivity to high and low-frequency ranges at low volume.
This control is adjustable to retain full tonal range at any
volume level.
1
Set to the “FLAT” position.
2
Set to the loudest listening
level that you would listen
to.
3
Turn until the desired
volume is gained.
AX-590 AX-490
AX-590
AX-590 AX-490
AX-590 AX-490
AX-490
BALANCE
5 5
4
3
2
l
0
l
2
3
4
L R
BASS
5 5
4
3
2
l
0
l
2
3
4
TREBLE
5 5
4
3
2
l
0
l
2
3
4
BASS
5 5
4
3
2
l
0
l
2
3
4
TREBLE
5 5
4
3
2
l
0
l
2
3
4
BALANCE
5 5
4
3
2
l
0
l
2
3
4
L R
SPEAKERS
A B
ON
OFF
ON
OFF
LOUDNESS
5 7
4
3
2
l
FLAT
l0
9
8
6
30 dB
LOUDNESS
5 7
4
3
2
l
FLAT
l0
9
8
6
30 dB
LOUDNESS
5 7
4
3
2
l
FLAT
l0
9
8
6
30 dB
LOUDNESS
5 7
4
3
2
l
FLAT
l0
9
8
6
30 dB
VOLUME
l6 l8
20
24
28
34
40
50
60
70
l4
l2
l0
8
6
4
3
2
l
0
–dB