Sunfire MK IV - Manual (Page 6)

User's Manual 6
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1. Power/Auto on Indicator
This light is bright when the subwoofer
is on, and dim when the subwoofer is
in its standby mode. This is controlled
by the AUTO ON/OFF circuit. The
presence of an audio signal turns the
unit on. After approximately fifteen
minutes of signal absence, the
subwoofer will go to its standby mode.
The light will only go off when the unit
is unplugged from the wall.
2. Volume Control
This control lets you match the output
level of the subwoofer to the level of
your satellite/main speakers. The
subwoofer output will increase as the
volume control is rotated clockwise.
When you have just installed your
system, turn this down first before
turning on your subwoofer. This will
prevent any loud surprises.
3. Crossover Frequency
This controls the high frequency cutoff
point. With the control rotated fully
clockwise, the subwoofer will repro-
duce frequencies up to 100 Hz. With
the control fully counter-clockwise the
subwoofer reproduces up to 35 Hz.
Rotate the control until the bass
sounds natural. If the mid-bass sounds
natural but you want more low bass,
turn the crossover frequency down a
little, then turn the volume control up
by about the same amount. This
increases the low-bass output while
leaving the mid-bass output the same.
4. Phase Control
This control changes the relative phase
of the subwoofer with respect to your
other speakers. Use this control to help
blend the subwoofer with the rest of
your system. This is accomplished by
adjusting the control in small incre-
ments as you listen for the most bass
at your listening position. As a final
trim, readjust the crossover and
volume controls after the phase control
has been set.
5. Flat/Video Contour Switch
When this switch is set to FLAT, the
frequency response extends down to
18 Hz. This is the recommended
setting for most audio and video
applications.
When set to Video Contour, a low
frequency roll-off is introduced
commencing below approximately
30 Hz. This setting may be used if your
Control Panel Features