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Model T70.1 PBM
Figure 2:
Typical arrange-
ment for a single
subwoofer in a
home theater.
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with no signal detected from the rest of the system, the amplifier will shut itself off and go into
standby mode. Power consumption in the standby mode is negligible. Standby operation can be
completely bypassed by placing the “Auto” switch in the “On” position. In this mode, the subwoofer
will be controlled by the position of the Main Power switch.
Placement and Operation
Generally speaking, the best location for your new Subwoofer will be in the front of the room, in or
close to a corner (Figure 2). 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 too much bass or a “one note” boomy effect. Under such circumstances
the subwoofer may work better away from the wall or corner. You should experiment to find the best
position in your room.
Helpful Hint: A particularly useful experiment is to place the subwoofer right at the prime listening position
(move that couch or chair out of the way and put the sub in its place). Then play something with lots of good
bass (preferably music), and walk around the room, listening to the subwoofer’s response. When you locate an
area that has ample amounts of well defined bass you have found a good potential place to locate the sub.
Dual Subwoofer Placement
When two subwoofers are used you may wish to place them asymmetrically; that is, in slightly
different positions in the room (Figure 3). This will reduce common mode room resonances that
typically occur with symmetrically placed subwoofers. Another good option is to place the subwoofers
in the same corner. Several tests have shown this to be a viable means of producing smooth bass
response in many rooms.