Atlantic Technology 212 SB Gebruiksaanwijzing - Pagina 10
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10
Care of Your Subwoofer
Dual Subwoofer Placement
When two subwoofers are used,you may wish to place them asymmetri-
cally; that is, in slightly different positions in the room (Figure 7). This
will reduce common mode room resonances that occur with symmetri-
cally positioned subwoofers.You can also try placing the subwoofers in
the same corner,if you wish.Experiments have shown this to be a viable
means of producing smooth bass response in many rooms.
Figure 7
Asymmetrical arrangement for 2 subwoofers in a home theater, for example, one
closer to a corner than the other
Place subwoofers
assymmetrically in room
for smoother bass
Using the Subwoofer Crossover Control
ON
AUTO
When used with the System 1200 or 2200,
60 Hz
the Crossover control should be set at
around 100Hz unless you are using a pro-
cessor with its own built-in crossover. The
goal is to optimize the performance of the
40 Hz
140 Hz
system by ensuring that the subwoofer and
satellites produce a cohesive and well integrated sound"picture. "
NORMAL
INVERT
Many surround sound receivers and processors offer a choice of cross-
overs,typically between 80 Hz and 120 Hz.If yours does,we recommend
using the 100Hz setting when using small speakers such as those in the
NORMAL
BYPASS
CAUTION:
System 1200 or 2200.Consult your electronics owner's manual for more
FOR CONTINUED PROTECTION AGAINST FIRE,
details.
REPLACE ONLY WITH SAME TYPE 250V FUSE
RIGHT
L / MONO
Higher crossover frequencies pass more bass but can sound boomy
and may be more easily localized to the subwoofer. Higher crossover
frequencies may be suitable, however, when using very small satellites
that have no real low frequency performance. Settings lower than 80Hz
should be employed if you are using larger speakers that have extended
bass response.This way,the subwoofer will only reproduce the very low-
est bass frequencies that are in the range where the large main speakers
begin to roll off.
It's generally undesirable to have the main speakers and the subwoofer
overlap too much. Larger speakers means a lower Low-pass crossover
frequency, smaller speakers means a higher Low-pass crossover fre-
quency. Consult the manufacturer's specified low frequency response
for your main speakers to determine the appropriate Low-pass setting
on your subwoofer.In the end,however,a little time spent experimenting
will generally result in dramatically better bass response.
STANDBY
CROSSOVER
FREQUENCY
PHASE
CROSSOVER
OUTPUT
INPUT
ON
AUTO
60 Hz
Model 102, 212 and 422 SB Powered Subwoofer
The Phase Invert Control
40 Hz
140 Hz
NORMAL
INVERT
phase can enhance room acoustics. Since there is so much variation in
NORMAL
BYPASS
the industry regarding phase, a switch that will reverse the phase of the
subwoofer is provided on the amplifier panel.Listen to a monaural musi-
cal source with strong bass content.(For example,you can use the mono
RIGHT
L / MONO
switch on an FM tuner or preamp, or use a Y-connector on the outputs
of one of your source components to get a mono signal.)
Experiment with the position of the phase switch to get the smoothest
bass.It should be obvious which is the correct setting.In particular,there
will be a more integrated transition between the satellites and the sub-
woofer when they are properly phased.
A Word About Bass, Center Channel Modes
and System Set Up
Many surround processors and receivers feature a"Wide"and"Normal"
mode for the center channel speaker.Atlantic Technology recommends
that the center channel be operated in the "Normal" mode when using
a powered subwoofer. The center channel speaker will sound more
dynamic and the intelligibility of the system will generally be improved
when in the"Normal"mode.
With discrete digital 5.1,6.1,or 7.1 channel systems (Dolby Digital,DTS,
etc.) many controllers provide a Bass Management option,which lets you
set the front and rear speakers in a limited bandwidth (Small) or full
range (Large) mode.When using a subwoofer with Atlantic Technology
speakers we recommend setting such a controller to the Small position
for all the speakers in the system.
Care of Your Subwoofer
The 102 SB, 212 SB and 422 SB are constructed from Medium Density
Fiberboard. MDF is a non-resonant material ideal for speaker system
enclosures. To clean the cabinet you may use a soft cloth either dry or
slightly dampened with clean water.Be careful not to wet the cabinet or
allow any water to enter the cabinet seams.Avoid placing your speakers
in direct sunlight or near a source of heat that may, over time, damage
the finish.
IMPORTANT: Save Your Boxes! If you can do so, save the carton,
packing pieces and plastic bags that came with your subwoofer.
They will be useful in case you move or have to ship your sub-
woofer for any reason. In any case, save all packing materials until
you are certain that the system has suffered no damage in ship-
ment. If you find such damage, either visible or internal, contact
your dealer immediately for the proper return procedure.
STANDBY
CROSSOVER
FREQUENCY
A subwoofer operating out of phase
with the rest of the system won't pro-
PHASE
vide optimum low frequency perfor-
mance. Also, the correct subwoofer
CROSSOVER
OUTPUT
INPUT