Using The Subwoofer - Yamaha YHT-494 Owner's Manual

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1
Rear panel
a Power indicator
Lights up when the POWER switch is set to ON; goes off
when the POWER switch is set to OFF.
b INPUT jack
Input jack for connecting the line-level subwoofer output
on your amplifier.
c VOLUME control
Adjusts the volume of the subwoofer. Turn it clockwise to
increase the volume; counterclockwise to decrease the
volume.
d POWER switch
Set this to ON to turn on the subwoofer. Set it to OFF to
turn off the subwoofer.
Frequency characteristics
The following graph shows the
frequency characteristics of the
subwoofer (NS-SW280).
100 dB
90
80
70
60
50
40
20 50 100 200
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En

Using the subwoofer

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The following graph shows the combined frequency characteristics
of the subwoofer (NS-SW280) and front/center speaker (NS-BR300),
and surround speaker (NS-B285).
500 Hz
Setting the subwoofer volume
The very first time you use the subwoofer, you need to set the
volume balance between the subwoofer and the front speakers
as follows.
1
Turn on your other AV components.
2
Set the subwoofer's VOLUME control to minimum
(0).
3
Set the subwoofer's POWER switch to ON.
The power indicator on the rear panel lights up.
4
Play an audio source that contains low-frequency
bass sounds. Set the amplifier's volume control to a
suitable level.
5
Turn the subwoofer's VOLUME control up gradually
until you achieve a good balance between the
subwoofer and the other speakers.
Notes
• Once the subwoofer volume has been set, you can leave the
subwoofer's VOLUME control set as it is and use your
amplifier's volume control to adjust the volume of the entire
system.
• If you replace the front/center speaker (NS-BR300) with
other speakers, you will need to re-adjust the subwoofer's
volume.
• The frequency characteristics graphs below show how the
subwoofer and front speakers work together to provide a
full-range sound.
100 dB
90
80
70
NS-SW280
60
NS-B285
50
40
20 50 100 200 500 Hz
100 dB
90
80
70
NS-SW280
60
NS-BR300
50
40
20 50 100 200 500 Hz