4
Model SB-900DF Powered Subwoofer
Placement and Operation
Generally speaking, the best location for your new subwoofer is the
front of the room, close to a corner (Figure 5). Every room has its own
unique sound characteristics, and flexibility in the exact placement of
the subwoofer is always desirable. The closer the subwoofer is placed to
a wall and especially a corner, the more and deeper the bass response
you will hear. However, in some rooms, corner placement can produce a
“one note” boomy effect. Under such circumstances the subwoofer may
work better away from the corner. Experiment to find the best position
in your room.
Figure 5
Typical arrangement for a single subwoofer in a home theater.
1.
Start here
2.
Move to
corner for
more bass
3.
Move away
from wall for
less bass
Using the Subwoofer Crossover Control
NOTE: Set this control to "BYPASS" if
you are using a receiver that has its own
subwoofer crossover. Set this control to
"ACTIVE" if your electronics do not have
a bass management function. The goal is
to optimize the performance of the sys-
tem by ensuring that the subwoofer and
satellites produce a cohesive and well integrated sound “picture.”
Most surround sound receivers and processors offer a choice of cross-
overs, typically between 60Hz and 150Hz. We recommend using a setting
between 120Hz and 150Hz when using small speakers such as those in
a soundbar. Consult your electronics owner's manual for more details.
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.
Care of Your Subwoofer
Your subwoofer is 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.
015-1099-A
Subwoofer Troubleshooting Guide
Once your subwoofer is set up, you should have many years of maintenance free enjoyment from your system. However, if you should encoun-
ter a problem, refer to the following guide to help you find the solution. If a problem persists, you should contact your local authorized Atlantic
Technology dealer.
Problem
Possible Cause
Possible Solution
No bass output
AC power cord unplugged or
Plug into a working outlet.
plugged into a non-working outlet.
Input cables not securely
Check all connections, then try another
connected or defective.
input cable.
Audible buzz or hum
Input cable not securely connected
Check all connections, then try another
or defective.
input cable.
Ground loop through antenna or
Test by disconnecting antenna and/or cable
cable TV system input.
system input leads. If hum goes away, install
isolation balun(s) at that point.
